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)
177 * This barrier makes sure that all updates to ownership bits
178 * done by set_eqe_hw() hit memory before the consumer index
179 * is updated. set_eq_ci() allows the HCA to possibly write
180 * more EQ entries, and we want to avoid the exceedingly
181 * unlikely possibility of the HCA writing an entry and then
182 * having set_eqe_hw() overwrite the owner field.
185 mthca_write64(MTHCA_EQ_DB_SET_CI | eq->eqn, ci & (eq->nent - 1),
186 dev->kar + MTHCA_EQ_DOORBELL,
187 MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
190 static inline void arbel_set_eq_ci(struct mthca_dev *dev, struct mthca_eq *eq, u32 ci)
192 /* See comment in tavor_set_eq_ci() above. */
194 __raw_writel((__force u32) cpu_to_be32(ci),
195 dev->eq_regs.arbel.eq_set_ci_base + eq->eqn * 8);
196 /* We still want ordering, just not swabbing, so add a barrier */
200 static inline void set_eq_ci(struct mthca_dev *dev, struct mthca_eq *eq, u32 ci)
202 if (mthca_is_memfree(dev))
203 arbel_set_eq_ci(dev, eq, ci);
205 tavor_set_eq_ci(dev, eq, ci);
208 static inline void tavor_eq_req_not(struct mthca_dev *dev, int eqn)
210 mthca_write64(MTHCA_EQ_DB_REQ_NOT | eqn, 0,
211 dev->kar + MTHCA_EQ_DOORBELL,
212 MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
215 static inline void arbel_eq_req_not(struct mthca_dev *dev, u32 eqn_mask)
217 writel(eqn_mask, dev->eq_regs.arbel.eq_arm);
220 static inline void disarm_cq(struct mthca_dev *dev, int eqn, int cqn)
222 if (!mthca_is_memfree(dev)) {
223 mthca_write64(MTHCA_EQ_DB_DISARM_CQ | eqn, cqn,
224 dev->kar + MTHCA_EQ_DOORBELL,
225 MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
229 static inline struct mthca_eqe *get_eqe(struct mthca_eq *eq, u32 entry)
231 unsigned long off = (entry & (eq->nent - 1)) * MTHCA_EQ_ENTRY_SIZE;
232 return eq->page_list[off / PAGE_SIZE].buf + off % PAGE_SIZE;
235 static inline struct mthca_eqe *next_eqe_sw(struct mthca_eq *eq)
237 struct mthca_eqe *eqe;
238 eqe = get_eqe(eq, eq->cons_index);
239 return (MTHCA_EQ_ENTRY_OWNER_HW & eqe->owner) ? NULL : eqe;
242 static inline void set_eqe_hw(struct mthca_eqe *eqe)
244 eqe->owner = MTHCA_EQ_ENTRY_OWNER_HW;
247 static void port_change(struct mthca_dev *dev, int port, int active)
249 struct ib_event record;
251 mthca_dbg(dev, "Port change to %s for port %d\n",
252 active ? "active" : "down", port);
254 record.device = &dev->ib_dev;
255 record.event = active ? IB_EVENT_PORT_ACTIVE : IB_EVENT_PORT_ERR;
256 record.element.port_num = port;
258 ib_dispatch_event(&record);
261 static int mthca_eq_int(struct mthca_dev *dev, struct mthca_eq *eq)
263 struct mthca_eqe *eqe;
268 while ((eqe = next_eqe_sw(eq))) {
270 * Make sure we read EQ entry contents after we've
271 * checked the ownership bit.
276 case MTHCA_EVENT_TYPE_COMP:
277 disarm_cqn = be32_to_cpu(eqe->event.comp.cqn) & 0xffffff;
278 disarm_cq(dev, eq->eqn, disarm_cqn);
279 mthca_cq_completion(dev, disarm_cqn);
282 case MTHCA_EVENT_TYPE_PATH_MIG:
283 mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
287 case MTHCA_EVENT_TYPE_COMM_EST:
288 mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
292 case MTHCA_EVENT_TYPE_SQ_DRAINED:
293 mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
294 IB_EVENT_SQ_DRAINED);
297 case MTHCA_EVENT_TYPE_SRQ_QP_LAST_WQE:
298 mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
299 IB_EVENT_QP_LAST_WQE_REACHED);
302 case MTHCA_EVENT_TYPE_SRQ_LIMIT:
303 mthca_srq_event(dev, be32_to_cpu(eqe->event.srq.srqn) & 0xffffff,
304 IB_EVENT_SRQ_LIMIT_REACHED);
307 case MTHCA_EVENT_TYPE_WQ_CATAS_ERROR:
308 mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
312 case MTHCA_EVENT_TYPE_PATH_MIG_FAILED:
313 mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
314 IB_EVENT_PATH_MIG_ERR);
317 case MTHCA_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
318 mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
319 IB_EVENT_QP_REQ_ERR);
322 case MTHCA_EVENT_TYPE_WQ_ACCESS_ERROR:
323 mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
324 IB_EVENT_QP_ACCESS_ERR);
327 case MTHCA_EVENT_TYPE_CMD:
329 be16_to_cpu(eqe->event.cmd.token),
330 eqe->event.cmd.status,
331 be64_to_cpu(eqe->event.cmd.out_param));
334 case MTHCA_EVENT_TYPE_PORT_CHANGE:
336 (be32_to_cpu(eqe->event.port_change.port) >> 28) & 3,
337 eqe->subtype == 0x4);
340 case MTHCA_EVENT_TYPE_CQ_ERROR:
341 mthca_warn(dev, "CQ %s on CQN %06x\n",
342 eqe->event.cq_err.syndrome == 1 ?
343 "overrun" : "access violation",
344 be32_to_cpu(eqe->event.cq_err.cqn) & 0xffffff);
345 mthca_cq_event(dev, be32_to_cpu(eqe->event.cq_err.cqn),
349 case MTHCA_EVENT_TYPE_EQ_OVERFLOW:
350 mthca_warn(dev, "EQ overrun on EQN %d\n", eq->eqn);
353 case MTHCA_EVENT_TYPE_EEC_CATAS_ERROR:
354 case MTHCA_EVENT_TYPE_SRQ_CATAS_ERROR:
355 case MTHCA_EVENT_TYPE_LOCAL_CATAS_ERROR:
356 case MTHCA_EVENT_TYPE_ECC_DETECT:
358 mthca_warn(dev, "Unhandled event %02x(%02x) on EQ %d\n",
359 eqe->type, eqe->subtype, eq->eqn);
369 * The HCA will think the queue has overflowed if we
370 * don't tell it we've been processing events. We
371 * create our EQs with MTHCA_NUM_SPARE_EQE extra
372 * entries, so we must update our consumer index at
375 if (unlikely(set_ci >= MTHCA_NUM_SPARE_EQE)) {
377 * Conditional on hca_type is OK here because
378 * this is a rare case, not the fast path.
380 set_eq_ci(dev, eq, eq->cons_index);
386 * Rely on caller to set consumer index so that we don't have
387 * to test hca_type in our interrupt handling fast path.
392 static irqreturn_t mthca_tavor_interrupt(int irq, void *dev_ptr)
394 struct mthca_dev *dev = dev_ptr;
398 if (dev->eq_table.clr_mask)
399 writel(dev->eq_table.clr_mask, dev->eq_table.clr_int);
401 ecr = readl(dev->eq_regs.tavor.ecr_base + 4);
405 writel(ecr, dev->eq_regs.tavor.ecr_base +
406 MTHCA_ECR_CLR_BASE - MTHCA_ECR_BASE + 4);
408 for (i = 0; i < MTHCA_NUM_EQ; ++i)
409 if (ecr & dev->eq_table.eq[i].eqn_mask) {
410 if (mthca_eq_int(dev, &dev->eq_table.eq[i]))
411 tavor_set_eq_ci(dev, &dev->eq_table.eq[i],
412 dev->eq_table.eq[i].cons_index);
413 tavor_eq_req_not(dev, dev->eq_table.eq[i].eqn);
419 static irqreturn_t mthca_tavor_msi_x_interrupt(int irq, void *eq_ptr)
421 struct mthca_eq *eq = eq_ptr;
422 struct mthca_dev *dev = eq->dev;
424 mthca_eq_int(dev, eq);
425 tavor_set_eq_ci(dev, eq, eq->cons_index);
426 tavor_eq_req_not(dev, eq->eqn);
428 /* MSI-X vectors always belong to us */
432 static irqreturn_t mthca_arbel_interrupt(int irq, void *dev_ptr)
434 struct mthca_dev *dev = dev_ptr;
438 if (dev->eq_table.clr_mask)
439 writel(dev->eq_table.clr_mask, dev->eq_table.clr_int);
441 for (i = 0; i < MTHCA_NUM_EQ; ++i)
442 if (mthca_eq_int(dev, &dev->eq_table.eq[i])) {
444 arbel_set_eq_ci(dev, &dev->eq_table.eq[i],
445 dev->eq_table.eq[i].cons_index);
448 arbel_eq_req_not(dev, dev->eq_table.arm_mask);
450 return IRQ_RETVAL(work);
453 static irqreturn_t mthca_arbel_msi_x_interrupt(int irq, void *eq_ptr)
455 struct mthca_eq *eq = eq_ptr;
456 struct mthca_dev *dev = eq->dev;
458 mthca_eq_int(dev, eq);
459 arbel_set_eq_ci(dev, eq, eq->cons_index);
460 arbel_eq_req_not(dev, eq->eqn_mask);
462 /* MSI-X vectors always belong to us */
466 static int mthca_create_eq(struct mthca_dev *dev,
472 u64 *dma_list = NULL;
474 struct mthca_mailbox *mailbox;
475 struct mthca_eq_context *eq_context;
481 eq->nent = roundup_pow_of_two(max(nent, 2));
482 npages = ALIGN(eq->nent * MTHCA_EQ_ENTRY_SIZE, PAGE_SIZE) / PAGE_SIZE;
484 eq->page_list = kmalloc(npages * sizeof *eq->page_list,
489 for (i = 0; i < npages; ++i)
490 eq->page_list[i].buf = NULL;
492 dma_list = kmalloc(npages * sizeof *dma_list, GFP_KERNEL);
496 mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
499 eq_context = mailbox->buf;
501 for (i = 0; i < npages; ++i) {
502 eq->page_list[i].buf = dma_alloc_coherent(&dev->pdev->dev,
503 PAGE_SIZE, &t, GFP_KERNEL);
504 if (!eq->page_list[i].buf)
505 goto err_out_free_pages;
508 pci_unmap_addr_set(&eq->page_list[i], mapping, t);
510 clear_page(eq->page_list[i].buf);
513 for (i = 0; i < eq->nent; ++i)
514 set_eqe_hw(get_eqe(eq, i));
516 eq->eqn = mthca_alloc(&dev->eq_table.alloc);
518 goto err_out_free_pages;
520 err = mthca_mr_alloc_phys(dev, dev->driver_pd.pd_num,
521 dma_list, PAGE_SHIFT, npages,
522 0, npages * PAGE_SIZE,
523 MTHCA_MPT_FLAG_LOCAL_WRITE |
524 MTHCA_MPT_FLAG_LOCAL_READ,
527 goto err_out_free_eq;
529 memset(eq_context, 0, sizeof *eq_context);
530 eq_context->flags = cpu_to_be32(MTHCA_EQ_STATUS_OK |
532 MTHCA_EQ_STATE_ARMED |
534 if (mthca_is_memfree(dev))
535 eq_context->flags |= cpu_to_be32(MTHCA_EQ_STATE_ARBEL);
537 eq_context->logsize_usrpage = cpu_to_be32((ffs(eq->nent) - 1) << 24);
538 if (mthca_is_memfree(dev)) {
539 eq_context->arbel_pd = cpu_to_be32(dev->driver_pd.pd_num);
541 eq_context->logsize_usrpage |= cpu_to_be32(dev->driver_uar.index);
542 eq_context->tavor_pd = cpu_to_be32(dev->driver_pd.pd_num);
544 eq_context->intr = intr;
545 eq_context->lkey = cpu_to_be32(eq->mr.ibmr.lkey);
547 err = mthca_SW2HW_EQ(dev, mailbox, eq->eqn, &status);
549 mthca_warn(dev, "SW2HW_EQ failed (%d)\n", err);
550 goto err_out_free_mr;
553 mthca_warn(dev, "SW2HW_EQ returned status 0x%02x\n",
556 goto err_out_free_mr;
560 mthca_free_mailbox(dev, mailbox);
562 eq->eqn_mask = swab32(1 << eq->eqn);
565 dev->eq_table.arm_mask |= eq->eqn_mask;
567 mthca_dbg(dev, "Allocated EQ %d with %d entries\n",
573 mthca_free_mr(dev, &eq->mr);
576 mthca_free(&dev->eq_table.alloc, eq->eqn);
579 for (i = 0; i < npages; ++i)
580 if (eq->page_list[i].buf)
581 dma_free_coherent(&dev->pdev->dev, PAGE_SIZE,
582 eq->page_list[i].buf,
583 pci_unmap_addr(&eq->page_list[i],
586 mthca_free_mailbox(dev, mailbox);
589 kfree(eq->page_list);
596 static void mthca_free_eq(struct mthca_dev *dev,
599 struct mthca_mailbox *mailbox;
602 int npages = (eq->nent * MTHCA_EQ_ENTRY_SIZE + PAGE_SIZE - 1) /
606 mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
610 err = mthca_HW2SW_EQ(dev, mailbox, eq->eqn, &status);
612 mthca_warn(dev, "HW2SW_EQ failed (%d)\n", err);
614 mthca_warn(dev, "HW2SW_EQ returned status 0x%02x\n", status);
616 dev->eq_table.arm_mask &= ~eq->eqn_mask;
619 mthca_dbg(dev, "Dumping EQ context %02x:\n", eq->eqn);
620 for (i = 0; i < sizeof (struct mthca_eq_context) / 4; ++i) {
622 printk("[%02x] ", i * 4);
623 printk(" %08x", be32_to_cpup(mailbox->buf + i * 4));
624 if ((i + 1) % 4 == 0)
629 mthca_free_mr(dev, &eq->mr);
630 for (i = 0; i < npages; ++i)
631 pci_free_consistent(dev->pdev, PAGE_SIZE,
632 eq->page_list[i].buf,
633 pci_unmap_addr(&eq->page_list[i], mapping));
635 kfree(eq->page_list);
636 mthca_free_mailbox(dev, mailbox);
639 static void mthca_free_irqs(struct mthca_dev *dev)
643 if (dev->eq_table.have_irq)
644 free_irq(dev->pdev->irq, dev);
645 for (i = 0; i < MTHCA_NUM_EQ; ++i)
646 if (dev->eq_table.eq[i].have_irq)
647 free_irq(dev->eq_table.eq[i].msi_x_vector,
648 dev->eq_table.eq + i);
651 static int mthca_map_reg(struct mthca_dev *dev,
652 unsigned long offset, unsigned long size,
655 unsigned long base = pci_resource_start(dev->pdev, 0);
657 if (!request_mem_region(base + offset, size, DRV_NAME))
660 *map = ioremap(base + offset, size);
662 release_mem_region(base + offset, size);
669 static void mthca_unmap_reg(struct mthca_dev *dev, unsigned long offset,
670 unsigned long size, void __iomem *map)
672 unsigned long base = pci_resource_start(dev->pdev, 0);
674 release_mem_region(base + offset, size);
678 static int mthca_map_eq_regs(struct mthca_dev *dev)
680 if (mthca_is_memfree(dev)) {
682 * We assume that the EQ arm and EQ set CI registers
683 * fall within the first BAR. We can't trust the
684 * values firmware gives us, since those addresses are
685 * valid on the HCA's side of the PCI bus but not
686 * necessarily the host side.
688 if (mthca_map_reg(dev, (pci_resource_len(dev->pdev, 0) - 1) &
689 dev->fw.arbel.clr_int_base, MTHCA_CLR_INT_SIZE,
691 mthca_err(dev, "Couldn't map interrupt clear register, "
697 * Add 4 because we limit ourselves to EQs 0 ... 31,
698 * so we only need the low word of the register.
700 if (mthca_map_reg(dev, ((pci_resource_len(dev->pdev, 0) - 1) &
701 dev->fw.arbel.eq_arm_base) + 4, 4,
702 &dev->eq_regs.arbel.eq_arm)) {
703 mthca_err(dev, "Couldn't map EQ arm register, aborting.\n");
704 mthca_unmap_reg(dev, (pci_resource_len(dev->pdev, 0) - 1) &
705 dev->fw.arbel.clr_int_base, MTHCA_CLR_INT_SIZE,
710 if (mthca_map_reg(dev, (pci_resource_len(dev->pdev, 0) - 1) &
711 dev->fw.arbel.eq_set_ci_base,
712 MTHCA_EQ_SET_CI_SIZE,
713 &dev->eq_regs.arbel.eq_set_ci_base)) {
714 mthca_err(dev, "Couldn't map EQ CI register, aborting.\n");
715 mthca_unmap_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_unmap_reg(dev, (pci_resource_len(dev->pdev, 0) - 1) &
719 dev->fw.arbel.clr_int_base, MTHCA_CLR_INT_SIZE,
724 if (mthca_map_reg(dev, MTHCA_CLR_INT_BASE, MTHCA_CLR_INT_SIZE,
726 mthca_err(dev, "Couldn't map interrupt clear register, "
731 if (mthca_map_reg(dev, MTHCA_ECR_BASE,
732 MTHCA_ECR_SIZE + MTHCA_ECR_CLR_SIZE,
733 &dev->eq_regs.tavor.ecr_base)) {
734 mthca_err(dev, "Couldn't map ecr register, "
736 mthca_unmap_reg(dev, MTHCA_CLR_INT_BASE, MTHCA_CLR_INT_SIZE,
746 static void mthca_unmap_eq_regs(struct mthca_dev *dev)
748 if (mthca_is_memfree(dev)) {
749 mthca_unmap_reg(dev, (pci_resource_len(dev->pdev, 0) - 1) &
750 dev->fw.arbel.eq_set_ci_base,
751 MTHCA_EQ_SET_CI_SIZE,
752 dev->eq_regs.arbel.eq_set_ci_base);
753 mthca_unmap_reg(dev, ((pci_resource_len(dev->pdev, 0) - 1) &
754 dev->fw.arbel.eq_arm_base) + 4, 4,
755 dev->eq_regs.arbel.eq_arm);
756 mthca_unmap_reg(dev, (pci_resource_len(dev->pdev, 0) - 1) &
757 dev->fw.arbel.clr_int_base, MTHCA_CLR_INT_SIZE,
760 mthca_unmap_reg(dev, MTHCA_ECR_BASE,
761 MTHCA_ECR_SIZE + MTHCA_ECR_CLR_SIZE,
762 dev->eq_regs.tavor.ecr_base);
763 mthca_unmap_reg(dev, MTHCA_CLR_INT_BASE, MTHCA_CLR_INT_SIZE,
768 int mthca_map_eq_icm(struct mthca_dev *dev, u64 icm_virt)
774 * We assume that mapping one page is enough for the whole EQ
775 * context table. This is fine with all current HCAs, because
776 * we only use 32 EQs and each EQ uses 32 bytes of context
777 * memory, or 1 KB total.
779 dev->eq_table.icm_virt = icm_virt;
780 dev->eq_table.icm_page = alloc_page(GFP_HIGHUSER);
781 if (!dev->eq_table.icm_page)
783 dev->eq_table.icm_dma = pci_map_page(dev->pdev, dev->eq_table.icm_page, 0,
784 PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
785 if (pci_dma_mapping_error(dev->eq_table.icm_dma)) {
786 __free_page(dev->eq_table.icm_page);
790 ret = mthca_MAP_ICM_page(dev, dev->eq_table.icm_dma, icm_virt, &status);
794 pci_unmap_page(dev->pdev, dev->eq_table.icm_dma, PAGE_SIZE,
795 PCI_DMA_BIDIRECTIONAL);
796 __free_page(dev->eq_table.icm_page);
802 void mthca_unmap_eq_icm(struct mthca_dev *dev)
806 mthca_UNMAP_ICM(dev, dev->eq_table.icm_virt, 1, &status);
807 pci_unmap_page(dev->pdev, dev->eq_table.icm_dma, PAGE_SIZE,
808 PCI_DMA_BIDIRECTIONAL);
809 __free_page(dev->eq_table.icm_page);
812 int mthca_init_eq_table(struct mthca_dev *dev)
819 err = mthca_alloc_init(&dev->eq_table.alloc,
821 dev->limits.num_eqs - 1,
822 dev->limits.reserved_eqs);
826 err = mthca_map_eq_regs(dev);
830 if (dev->mthca_flags & MTHCA_FLAG_MSI_X) {
831 dev->eq_table.clr_mask = 0;
833 dev->eq_table.clr_mask =
834 swab32(1 << (dev->eq_table.inta_pin & 31));
835 dev->eq_table.clr_int = dev->clr_base +
836 (dev->eq_table.inta_pin < 32 ? 4 : 0);
839 dev->eq_table.arm_mask = 0;
841 intr = dev->eq_table.inta_pin;
843 err = mthca_create_eq(dev, dev->limits.num_cqs + MTHCA_NUM_SPARE_EQE,
844 (dev->mthca_flags & MTHCA_FLAG_MSI_X) ? 128 : intr,
845 &dev->eq_table.eq[MTHCA_EQ_COMP]);
849 err = mthca_create_eq(dev, MTHCA_NUM_ASYNC_EQE + MTHCA_NUM_SPARE_EQE,
850 (dev->mthca_flags & MTHCA_FLAG_MSI_X) ? 129 : intr,
851 &dev->eq_table.eq[MTHCA_EQ_ASYNC]);
855 err = mthca_create_eq(dev, MTHCA_NUM_CMD_EQE + MTHCA_NUM_SPARE_EQE,
856 (dev->mthca_flags & MTHCA_FLAG_MSI_X) ? 130 : intr,
857 &dev->eq_table.eq[MTHCA_EQ_CMD]);
861 if (dev->mthca_flags & MTHCA_FLAG_MSI_X) {
862 static const char *eq_name[] = {
863 [MTHCA_EQ_COMP] = DRV_NAME " (comp)",
864 [MTHCA_EQ_ASYNC] = DRV_NAME " (async)",
865 [MTHCA_EQ_CMD] = DRV_NAME " (cmd)"
868 for (i = 0; i < MTHCA_NUM_EQ; ++i) {
869 err = request_irq(dev->eq_table.eq[i].msi_x_vector,
870 mthca_is_memfree(dev) ?
871 mthca_arbel_msi_x_interrupt :
872 mthca_tavor_msi_x_interrupt,
873 0, eq_name[i], dev->eq_table.eq + i);
876 dev->eq_table.eq[i].have_irq = 1;
879 err = request_irq(dev->pdev->irq,
880 mthca_is_memfree(dev) ?
881 mthca_arbel_interrupt :
882 mthca_tavor_interrupt,
883 IRQF_SHARED, DRV_NAME, dev);
886 dev->eq_table.have_irq = 1;
889 err = mthca_MAP_EQ(dev, async_mask(dev),
890 0, dev->eq_table.eq[MTHCA_EQ_ASYNC].eqn, &status);
892 mthca_warn(dev, "MAP_EQ for async EQ %d failed (%d)\n",
893 dev->eq_table.eq[MTHCA_EQ_ASYNC].eqn, err);
895 mthca_warn(dev, "MAP_EQ for async EQ %d returned status 0x%02x\n",
896 dev->eq_table.eq[MTHCA_EQ_ASYNC].eqn, status);
898 err = mthca_MAP_EQ(dev, MTHCA_CMD_EVENT_MASK,
899 0, dev->eq_table.eq[MTHCA_EQ_CMD].eqn, &status);
901 mthca_warn(dev, "MAP_EQ for cmd EQ %d failed (%d)\n",
902 dev->eq_table.eq[MTHCA_EQ_CMD].eqn, err);
904 mthca_warn(dev, "MAP_EQ for cmd EQ %d returned status 0x%02x\n",
905 dev->eq_table.eq[MTHCA_EQ_CMD].eqn, status);
907 for (i = 0; i < MTHCA_NUM_EQ; ++i)
908 if (mthca_is_memfree(dev))
909 arbel_eq_req_not(dev, dev->eq_table.eq[i].eqn_mask);
911 tavor_eq_req_not(dev, dev->eq_table.eq[i].eqn);
916 mthca_free_irqs(dev);
917 mthca_free_eq(dev, &dev->eq_table.eq[MTHCA_EQ_CMD]);
920 mthca_free_eq(dev, &dev->eq_table.eq[MTHCA_EQ_ASYNC]);
923 mthca_free_eq(dev, &dev->eq_table.eq[MTHCA_EQ_COMP]);
926 mthca_unmap_eq_regs(dev);
929 mthca_alloc_cleanup(&dev->eq_table.alloc);
933 void mthca_cleanup_eq_table(struct mthca_dev *dev)
938 mthca_free_irqs(dev);
940 mthca_MAP_EQ(dev, async_mask(dev),
941 1, dev->eq_table.eq[MTHCA_EQ_ASYNC].eqn, &status);
942 mthca_MAP_EQ(dev, MTHCA_CMD_EVENT_MASK,
943 1, dev->eq_table.eq[MTHCA_EQ_CMD].eqn, &status);
945 for (i = 0; i < MTHCA_NUM_EQ; ++i)
946 mthca_free_eq(dev, &dev->eq_table.eq[i]);
948 mthca_unmap_eq_regs(dev);
950 mthca_alloc_cleanup(&dev->eq_table.alloc);