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
34 #include <linux/errno.h>
35 #include <linux/interrupt.h>
36 #include <linux/pci.h>
38 #include "mthca_dev.h"
39 #include "mthca_cmd.h"
40 #include "mthca_config_reg.h"
43 MTHCA_NUM_ASYNC_EQE = 0x80,
44 MTHCA_NUM_CMD_EQE = 0x80,
45 MTHCA_NUM_SPARE_EQE = 0x80,
46 MTHCA_EQ_ENTRY_SIZE = 0x20
50 * Must be packed because start is 64 bits but only aligned to 32 bits.
52 struct mthca_eq_context {
55 __be32 logsize_usrpage;
56 __be32 tavor_pd; /* reserved for Arbel */
59 __be32 arbel_pd; /* lost_count for Tavor */
62 __be32 consumer_index;
63 __be32 producer_index;
65 } __attribute__((packed));
67 #define MTHCA_EQ_STATUS_OK ( 0 << 28)
68 #define MTHCA_EQ_STATUS_OVERFLOW ( 9 << 28)
69 #define MTHCA_EQ_STATUS_WRITE_FAIL (10 << 28)
70 #define MTHCA_EQ_OWNER_SW ( 0 << 24)
71 #define MTHCA_EQ_OWNER_HW ( 1 << 24)
72 #define MTHCA_EQ_FLAG_TR ( 1 << 18)
73 #define MTHCA_EQ_FLAG_OI ( 1 << 17)
74 #define MTHCA_EQ_STATE_ARMED ( 1 << 8)
75 #define MTHCA_EQ_STATE_FIRED ( 2 << 8)
76 #define MTHCA_EQ_STATE_ALWAYS_ARMED ( 3 << 8)
77 #define MTHCA_EQ_STATE_ARBEL ( 8 << 8)
80 MTHCA_EVENT_TYPE_COMP = 0x00,
81 MTHCA_EVENT_TYPE_PATH_MIG = 0x01,
82 MTHCA_EVENT_TYPE_COMM_EST = 0x02,
83 MTHCA_EVENT_TYPE_SQ_DRAINED = 0x03,
84 MTHCA_EVENT_TYPE_SRQ_QP_LAST_WQE = 0x13,
85 MTHCA_EVENT_TYPE_SRQ_LIMIT = 0x14,
86 MTHCA_EVENT_TYPE_CQ_ERROR = 0x04,
87 MTHCA_EVENT_TYPE_WQ_CATAS_ERROR = 0x05,
88 MTHCA_EVENT_TYPE_EEC_CATAS_ERROR = 0x06,
89 MTHCA_EVENT_TYPE_PATH_MIG_FAILED = 0x07,
90 MTHCA_EVENT_TYPE_WQ_INVAL_REQ_ERROR = 0x10,
91 MTHCA_EVENT_TYPE_WQ_ACCESS_ERROR = 0x11,
92 MTHCA_EVENT_TYPE_SRQ_CATAS_ERROR = 0x12,
93 MTHCA_EVENT_TYPE_LOCAL_CATAS_ERROR = 0x08,
94 MTHCA_EVENT_TYPE_PORT_CHANGE = 0x09,
95 MTHCA_EVENT_TYPE_EQ_OVERFLOW = 0x0f,
96 MTHCA_EVENT_TYPE_ECC_DETECT = 0x0e,
97 MTHCA_EVENT_TYPE_CMD = 0x0a
100 #define MTHCA_ASYNC_EVENT_MASK ((1ULL << MTHCA_EVENT_TYPE_PATH_MIG) | \
101 (1ULL << MTHCA_EVENT_TYPE_COMM_EST) | \
102 (1ULL << MTHCA_EVENT_TYPE_SQ_DRAINED) | \
103 (1ULL << MTHCA_EVENT_TYPE_CQ_ERROR) | \
104 (1ULL << MTHCA_EVENT_TYPE_WQ_CATAS_ERROR) | \
105 (1ULL << MTHCA_EVENT_TYPE_EEC_CATAS_ERROR) | \
106 (1ULL << MTHCA_EVENT_TYPE_PATH_MIG_FAILED) | \
107 (1ULL << MTHCA_EVENT_TYPE_WQ_INVAL_REQ_ERROR) | \
108 (1ULL << MTHCA_EVENT_TYPE_WQ_ACCESS_ERROR) | \
109 (1ULL << MTHCA_EVENT_TYPE_LOCAL_CATAS_ERROR) | \
110 (1ULL << MTHCA_EVENT_TYPE_PORT_CHANGE) | \
111 (1ULL << MTHCA_EVENT_TYPE_ECC_DETECT))
112 #define MTHCA_SRQ_EVENT_MASK ((1ULL << MTHCA_EVENT_TYPE_SRQ_CATAS_ERROR) | \
113 (1ULL << MTHCA_EVENT_TYPE_SRQ_QP_LAST_WQE) | \
114 (1ULL << MTHCA_EVENT_TYPE_SRQ_LIMIT))
115 #define MTHCA_CMD_EVENT_MASK (1ULL << MTHCA_EVENT_TYPE_CMD)
117 #define MTHCA_EQ_DB_INC_CI (1 << 24)
118 #define MTHCA_EQ_DB_REQ_NOT (2 << 24)
119 #define MTHCA_EQ_DB_DISARM_CQ (3 << 24)
120 #define MTHCA_EQ_DB_SET_CI (4 << 24)
121 #define MTHCA_EQ_DB_ALWAYS_ARM (5 << 24)
132 } __attribute__((packed)) comp;
140 } __attribute__((packed)) cmd;
143 } __attribute__((packed)) qp;
146 } __attribute__((packed)) srq;
152 } __attribute__((packed)) cq_err;
156 } __attribute__((packed)) port_change;
160 } __attribute__((packed));
162 #define MTHCA_EQ_ENTRY_OWNER_SW (0 << 7)
163 #define MTHCA_EQ_ENTRY_OWNER_HW (1 << 7)
165 static inline u64 async_mask(struct mthca_dev *dev)
167 return dev->mthca_flags & MTHCA_FLAG_SRQ ?
168 MTHCA_ASYNC_EVENT_MASK | MTHCA_SRQ_EVENT_MASK :
169 MTHCA_ASYNC_EVENT_MASK;
172 static inline void tavor_set_eq_ci(struct mthca_dev *dev, struct mthca_eq *eq, u32 ci)
175 * This barrier makes sure that all updates to ownership bits
176 * done by set_eqe_hw() hit memory before the consumer index
177 * is updated. set_eq_ci() allows the HCA to possibly write
178 * more EQ entries, and we want to avoid the exceedingly
179 * unlikely possibility of the HCA writing an entry and then
180 * having set_eqe_hw() overwrite the owner field.
183 mthca_write64(MTHCA_EQ_DB_SET_CI | eq->eqn, ci & (eq->nent - 1),
184 dev->kar + MTHCA_EQ_DOORBELL,
185 MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
188 static inline void arbel_set_eq_ci(struct mthca_dev *dev, struct mthca_eq *eq, u32 ci)
190 /* See comment in tavor_set_eq_ci() above. */
192 __raw_writel((__force u32) cpu_to_be32(ci),
193 dev->eq_regs.arbel.eq_set_ci_base + eq->eqn * 8);
194 /* We still want ordering, just not swabbing, so add a barrier */
198 static inline void set_eq_ci(struct mthca_dev *dev, struct mthca_eq *eq, u32 ci)
200 if (mthca_is_memfree(dev))
201 arbel_set_eq_ci(dev, eq, ci);
203 tavor_set_eq_ci(dev, eq, ci);
206 static inline void tavor_eq_req_not(struct mthca_dev *dev, int eqn)
208 mthca_write64(MTHCA_EQ_DB_REQ_NOT | eqn, 0,
209 dev->kar + MTHCA_EQ_DOORBELL,
210 MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
213 static inline void arbel_eq_req_not(struct mthca_dev *dev, u32 eqn_mask)
215 writel(eqn_mask, dev->eq_regs.arbel.eq_arm);
218 static inline void disarm_cq(struct mthca_dev *dev, int eqn, int cqn)
220 if (!mthca_is_memfree(dev)) {
221 mthca_write64(MTHCA_EQ_DB_DISARM_CQ | eqn, cqn,
222 dev->kar + MTHCA_EQ_DOORBELL,
223 MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
227 static inline struct mthca_eqe *get_eqe(struct mthca_eq *eq, u32 entry)
229 unsigned long off = (entry & (eq->nent - 1)) * MTHCA_EQ_ENTRY_SIZE;
230 return eq->page_list[off / PAGE_SIZE].buf + off % PAGE_SIZE;
233 static inline struct mthca_eqe *next_eqe_sw(struct mthca_eq *eq)
235 struct mthca_eqe *eqe;
236 eqe = get_eqe(eq, eq->cons_index);
237 return (MTHCA_EQ_ENTRY_OWNER_HW & eqe->owner) ? NULL : eqe;
240 static inline void set_eqe_hw(struct mthca_eqe *eqe)
242 eqe->owner = MTHCA_EQ_ENTRY_OWNER_HW;
245 static void port_change(struct mthca_dev *dev, int port, int active)
247 struct ib_event record;
249 mthca_dbg(dev, "Port change to %s for port %d\n",
250 active ? "active" : "down", port);
252 record.device = &dev->ib_dev;
253 record.event = active ? IB_EVENT_PORT_ACTIVE : IB_EVENT_PORT_ERR;
254 record.element.port_num = port;
256 ib_dispatch_event(&record);
259 static int mthca_eq_int(struct mthca_dev *dev, struct mthca_eq *eq)
261 struct mthca_eqe *eqe;
266 while ((eqe = next_eqe_sw(eq))) {
268 * Make sure we read EQ entry contents after we've
269 * checked the ownership bit.
274 case MTHCA_EVENT_TYPE_COMP:
275 disarm_cqn = be32_to_cpu(eqe->event.comp.cqn) & 0xffffff;
276 disarm_cq(dev, eq->eqn, disarm_cqn);
277 mthca_cq_completion(dev, disarm_cqn);
280 case MTHCA_EVENT_TYPE_PATH_MIG:
281 mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
285 case MTHCA_EVENT_TYPE_COMM_EST:
286 mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
290 case MTHCA_EVENT_TYPE_SQ_DRAINED:
291 mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
292 IB_EVENT_SQ_DRAINED);
295 case MTHCA_EVENT_TYPE_SRQ_QP_LAST_WQE:
296 mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
297 IB_EVENT_QP_LAST_WQE_REACHED);
300 case MTHCA_EVENT_TYPE_SRQ_LIMIT:
301 mthca_srq_event(dev, be32_to_cpu(eqe->event.srq.srqn) & 0xffffff,
302 IB_EVENT_SRQ_LIMIT_REACHED);
305 case MTHCA_EVENT_TYPE_WQ_CATAS_ERROR:
306 mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
310 case MTHCA_EVENT_TYPE_PATH_MIG_FAILED:
311 mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
312 IB_EVENT_PATH_MIG_ERR);
315 case MTHCA_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
316 mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
317 IB_EVENT_QP_REQ_ERR);
320 case MTHCA_EVENT_TYPE_WQ_ACCESS_ERROR:
321 mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
322 IB_EVENT_QP_ACCESS_ERR);
325 case MTHCA_EVENT_TYPE_CMD:
327 be16_to_cpu(eqe->event.cmd.token),
328 eqe->event.cmd.status,
329 be64_to_cpu(eqe->event.cmd.out_param));
332 case MTHCA_EVENT_TYPE_PORT_CHANGE:
334 (be32_to_cpu(eqe->event.port_change.port) >> 28) & 3,
335 eqe->subtype == 0x4);
338 case MTHCA_EVENT_TYPE_CQ_ERROR:
339 mthca_warn(dev, "CQ %s on CQN %06x\n",
340 eqe->event.cq_err.syndrome == 1 ?
341 "overrun" : "access violation",
342 be32_to_cpu(eqe->event.cq_err.cqn) & 0xffffff);
343 mthca_cq_event(dev, be32_to_cpu(eqe->event.cq_err.cqn),
347 case MTHCA_EVENT_TYPE_EQ_OVERFLOW:
348 mthca_warn(dev, "EQ overrun on EQN %d\n", eq->eqn);
351 case MTHCA_EVENT_TYPE_EEC_CATAS_ERROR:
352 case MTHCA_EVENT_TYPE_SRQ_CATAS_ERROR:
353 case MTHCA_EVENT_TYPE_LOCAL_CATAS_ERROR:
354 case MTHCA_EVENT_TYPE_ECC_DETECT:
356 mthca_warn(dev, "Unhandled event %02x(%02x) on EQ %d\n",
357 eqe->type, eqe->subtype, eq->eqn);
367 * The HCA will think the queue has overflowed if we
368 * don't tell it we've been processing events. We
369 * create our EQs with MTHCA_NUM_SPARE_EQE extra
370 * entries, so we must update our consumer index at
373 if (unlikely(set_ci >= MTHCA_NUM_SPARE_EQE)) {
375 * Conditional on hca_type is OK here because
376 * this is a rare case, not the fast path.
378 set_eq_ci(dev, eq, eq->cons_index);
384 * Rely on caller to set consumer index so that we don't have
385 * to test hca_type in our interrupt handling fast path.
390 static irqreturn_t mthca_tavor_interrupt(int irq, void *dev_ptr)
392 struct mthca_dev *dev = dev_ptr;
396 if (dev->eq_table.clr_mask)
397 writel(dev->eq_table.clr_mask, dev->eq_table.clr_int);
399 ecr = readl(dev->eq_regs.tavor.ecr_base + 4);
403 writel(ecr, dev->eq_regs.tavor.ecr_base +
404 MTHCA_ECR_CLR_BASE - MTHCA_ECR_BASE + 4);
406 for (i = 0; i < MTHCA_NUM_EQ; ++i)
407 if (ecr & dev->eq_table.eq[i].eqn_mask) {
408 if (mthca_eq_int(dev, &dev->eq_table.eq[i]))
409 tavor_set_eq_ci(dev, &dev->eq_table.eq[i],
410 dev->eq_table.eq[i].cons_index);
411 tavor_eq_req_not(dev, dev->eq_table.eq[i].eqn);
417 static irqreturn_t mthca_tavor_msi_x_interrupt(int irq, void *eq_ptr)
419 struct mthca_eq *eq = eq_ptr;
420 struct mthca_dev *dev = eq->dev;
422 mthca_eq_int(dev, eq);
423 tavor_set_eq_ci(dev, eq, eq->cons_index);
424 tavor_eq_req_not(dev, eq->eqn);
426 /* MSI-X vectors always belong to us */
430 static irqreturn_t mthca_arbel_interrupt(int irq, void *dev_ptr)
432 struct mthca_dev *dev = dev_ptr;
436 if (dev->eq_table.clr_mask)
437 writel(dev->eq_table.clr_mask, dev->eq_table.clr_int);
439 for (i = 0; i < MTHCA_NUM_EQ; ++i)
440 if (mthca_eq_int(dev, &dev->eq_table.eq[i])) {
442 arbel_set_eq_ci(dev, &dev->eq_table.eq[i],
443 dev->eq_table.eq[i].cons_index);
446 arbel_eq_req_not(dev, dev->eq_table.arm_mask);
448 return IRQ_RETVAL(work);
451 static irqreturn_t mthca_arbel_msi_x_interrupt(int irq, void *eq_ptr)
453 struct mthca_eq *eq = eq_ptr;
454 struct mthca_dev *dev = eq->dev;
456 mthca_eq_int(dev, eq);
457 arbel_set_eq_ci(dev, eq, eq->cons_index);
458 arbel_eq_req_not(dev, eq->eqn_mask);
460 /* MSI-X vectors always belong to us */
464 static int mthca_create_eq(struct mthca_dev *dev,
470 u64 *dma_list = NULL;
472 struct mthca_mailbox *mailbox;
473 struct mthca_eq_context *eq_context;
479 eq->nent = roundup_pow_of_two(max(nent, 2));
480 npages = ALIGN(eq->nent * MTHCA_EQ_ENTRY_SIZE, PAGE_SIZE) / PAGE_SIZE;
482 eq->page_list = kmalloc(npages * sizeof *eq->page_list,
487 for (i = 0; i < npages; ++i)
488 eq->page_list[i].buf = NULL;
490 dma_list = kmalloc(npages * sizeof *dma_list, GFP_KERNEL);
494 mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
497 eq_context = mailbox->buf;
499 for (i = 0; i < npages; ++i) {
500 eq->page_list[i].buf = dma_alloc_coherent(&dev->pdev->dev,
501 PAGE_SIZE, &t, GFP_KERNEL);
502 if (!eq->page_list[i].buf)
503 goto err_out_free_pages;
506 pci_unmap_addr_set(&eq->page_list[i], mapping, t);
508 clear_page(eq->page_list[i].buf);
511 for (i = 0; i < eq->nent; ++i)
512 set_eqe_hw(get_eqe(eq, i));
514 eq->eqn = mthca_alloc(&dev->eq_table.alloc);
516 goto err_out_free_pages;
518 err = mthca_mr_alloc_phys(dev, dev->driver_pd.pd_num,
519 dma_list, PAGE_SHIFT, npages,
520 0, npages * PAGE_SIZE,
521 MTHCA_MPT_FLAG_LOCAL_WRITE |
522 MTHCA_MPT_FLAG_LOCAL_READ,
525 goto err_out_free_eq;
527 memset(eq_context, 0, sizeof *eq_context);
528 eq_context->flags = cpu_to_be32(MTHCA_EQ_STATUS_OK |
530 MTHCA_EQ_STATE_ARMED |
532 if (mthca_is_memfree(dev))
533 eq_context->flags |= cpu_to_be32(MTHCA_EQ_STATE_ARBEL);
535 eq_context->logsize_usrpage = cpu_to_be32((ffs(eq->nent) - 1) << 24);
536 if (mthca_is_memfree(dev)) {
537 eq_context->arbel_pd = cpu_to_be32(dev->driver_pd.pd_num);
539 eq_context->logsize_usrpage |= cpu_to_be32(dev->driver_uar.index);
540 eq_context->tavor_pd = cpu_to_be32(dev->driver_pd.pd_num);
542 eq_context->intr = intr;
543 eq_context->lkey = cpu_to_be32(eq->mr.ibmr.lkey);
545 err = mthca_SW2HW_EQ(dev, mailbox, eq->eqn, &status);
547 mthca_warn(dev, "SW2HW_EQ failed (%d)\n", err);
548 goto err_out_free_mr;
551 mthca_warn(dev, "SW2HW_EQ returned status 0x%02x\n",
554 goto err_out_free_mr;
558 mthca_free_mailbox(dev, mailbox);
560 eq->eqn_mask = swab32(1 << eq->eqn);
563 dev->eq_table.arm_mask |= eq->eqn_mask;
565 mthca_dbg(dev, "Allocated EQ %d with %d entries\n",
571 mthca_free_mr(dev, &eq->mr);
574 mthca_free(&dev->eq_table.alloc, eq->eqn);
577 for (i = 0; i < npages; ++i)
578 if (eq->page_list[i].buf)
579 dma_free_coherent(&dev->pdev->dev, PAGE_SIZE,
580 eq->page_list[i].buf,
581 pci_unmap_addr(&eq->page_list[i],
584 mthca_free_mailbox(dev, mailbox);
587 kfree(eq->page_list);
594 static void mthca_free_eq(struct mthca_dev *dev,
597 struct mthca_mailbox *mailbox;
600 int npages = (eq->nent * MTHCA_EQ_ENTRY_SIZE + PAGE_SIZE - 1) /
604 mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
608 err = mthca_HW2SW_EQ(dev, mailbox, eq->eqn, &status);
610 mthca_warn(dev, "HW2SW_EQ failed (%d)\n", err);
612 mthca_warn(dev, "HW2SW_EQ returned status 0x%02x\n", status);
614 dev->eq_table.arm_mask &= ~eq->eqn_mask;
617 mthca_dbg(dev, "Dumping EQ context %02x:\n", eq->eqn);
618 for (i = 0; i < sizeof (struct mthca_eq_context) / 4; ++i) {
620 printk("[%02x] ", i * 4);
621 printk(" %08x", be32_to_cpup(mailbox->buf + i * 4));
622 if ((i + 1) % 4 == 0)
627 mthca_free_mr(dev, &eq->mr);
628 for (i = 0; i < npages; ++i)
629 pci_free_consistent(dev->pdev, PAGE_SIZE,
630 eq->page_list[i].buf,
631 pci_unmap_addr(&eq->page_list[i], mapping));
633 kfree(eq->page_list);
634 mthca_free_mailbox(dev, mailbox);
637 static void mthca_free_irqs(struct mthca_dev *dev)
641 if (dev->eq_table.have_irq)
642 free_irq(dev->pdev->irq, dev);
643 for (i = 0; i < MTHCA_NUM_EQ; ++i)
644 if (dev->eq_table.eq[i].have_irq)
645 free_irq(dev->eq_table.eq[i].msi_x_vector,
646 dev->eq_table.eq + i);
649 static int mthca_map_reg(struct mthca_dev *dev,
650 unsigned long offset, unsigned long size,
653 unsigned long base = pci_resource_start(dev->pdev, 0);
655 if (!request_mem_region(base + offset, size, DRV_NAME))
658 *map = ioremap(base + offset, size);
660 release_mem_region(base + offset, size);
667 static void mthca_unmap_reg(struct mthca_dev *dev, unsigned long offset,
668 unsigned long size, void __iomem *map)
670 unsigned long base = pci_resource_start(dev->pdev, 0);
672 release_mem_region(base + offset, size);
676 static int mthca_map_eq_regs(struct mthca_dev *dev)
678 if (mthca_is_memfree(dev)) {
680 * We assume that the EQ arm and EQ set CI registers
681 * fall within the first BAR. We can't trust the
682 * values firmware gives us, since those addresses are
683 * valid on the HCA's side of the PCI bus but not
684 * necessarily the host side.
686 if (mthca_map_reg(dev, (pci_resource_len(dev->pdev, 0) - 1) &
687 dev->fw.arbel.clr_int_base, MTHCA_CLR_INT_SIZE,
689 mthca_err(dev, "Couldn't map interrupt clear register, "
695 * Add 4 because we limit ourselves to EQs 0 ... 31,
696 * so we only need the low word of the register.
698 if (mthca_map_reg(dev, ((pci_resource_len(dev->pdev, 0) - 1) &
699 dev->fw.arbel.eq_arm_base) + 4, 4,
700 &dev->eq_regs.arbel.eq_arm)) {
701 mthca_err(dev, "Couldn't map EQ arm register, aborting.\n");
702 mthca_unmap_reg(dev, (pci_resource_len(dev->pdev, 0) - 1) &
703 dev->fw.arbel.clr_int_base, MTHCA_CLR_INT_SIZE,
708 if (mthca_map_reg(dev, (pci_resource_len(dev->pdev, 0) - 1) &
709 dev->fw.arbel.eq_set_ci_base,
710 MTHCA_EQ_SET_CI_SIZE,
711 &dev->eq_regs.arbel.eq_set_ci_base)) {
712 mthca_err(dev, "Couldn't map EQ CI register, aborting.\n");
713 mthca_unmap_reg(dev, ((pci_resource_len(dev->pdev, 0) - 1) &
714 dev->fw.arbel.eq_arm_base) + 4, 4,
715 dev->eq_regs.arbel.eq_arm);
716 mthca_unmap_reg(dev, (pci_resource_len(dev->pdev, 0) - 1) &
717 dev->fw.arbel.clr_int_base, MTHCA_CLR_INT_SIZE,
722 if (mthca_map_reg(dev, MTHCA_CLR_INT_BASE, MTHCA_CLR_INT_SIZE,
724 mthca_err(dev, "Couldn't map interrupt clear register, "
729 if (mthca_map_reg(dev, MTHCA_ECR_BASE,
730 MTHCA_ECR_SIZE + MTHCA_ECR_CLR_SIZE,
731 &dev->eq_regs.tavor.ecr_base)) {
732 mthca_err(dev, "Couldn't map ecr register, "
734 mthca_unmap_reg(dev, MTHCA_CLR_INT_BASE, MTHCA_CLR_INT_SIZE,
744 static void mthca_unmap_eq_regs(struct mthca_dev *dev)
746 if (mthca_is_memfree(dev)) {
747 mthca_unmap_reg(dev, (pci_resource_len(dev->pdev, 0) - 1) &
748 dev->fw.arbel.eq_set_ci_base,
749 MTHCA_EQ_SET_CI_SIZE,
750 dev->eq_regs.arbel.eq_set_ci_base);
751 mthca_unmap_reg(dev, ((pci_resource_len(dev->pdev, 0) - 1) &
752 dev->fw.arbel.eq_arm_base) + 4, 4,
753 dev->eq_regs.arbel.eq_arm);
754 mthca_unmap_reg(dev, (pci_resource_len(dev->pdev, 0) - 1) &
755 dev->fw.arbel.clr_int_base, MTHCA_CLR_INT_SIZE,
758 mthca_unmap_reg(dev, MTHCA_ECR_BASE,
759 MTHCA_ECR_SIZE + MTHCA_ECR_CLR_SIZE,
760 dev->eq_regs.tavor.ecr_base);
761 mthca_unmap_reg(dev, MTHCA_CLR_INT_BASE, MTHCA_CLR_INT_SIZE,
766 int mthca_map_eq_icm(struct mthca_dev *dev, u64 icm_virt)
772 * We assume that mapping one page is enough for the whole EQ
773 * context table. This is fine with all current HCAs, because
774 * we only use 32 EQs and each EQ uses 32 bytes of context
775 * memory, or 1 KB total.
777 dev->eq_table.icm_virt = icm_virt;
778 dev->eq_table.icm_page = alloc_page(GFP_HIGHUSER);
779 if (!dev->eq_table.icm_page)
781 dev->eq_table.icm_dma = pci_map_page(dev->pdev, dev->eq_table.icm_page, 0,
782 PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
783 if (pci_dma_mapping_error(dev->pdev, dev->eq_table.icm_dma)) {
784 __free_page(dev->eq_table.icm_page);
788 ret = mthca_MAP_ICM_page(dev, dev->eq_table.icm_dma, icm_virt, &status);
792 pci_unmap_page(dev->pdev, dev->eq_table.icm_dma, PAGE_SIZE,
793 PCI_DMA_BIDIRECTIONAL);
794 __free_page(dev->eq_table.icm_page);
800 void mthca_unmap_eq_icm(struct mthca_dev *dev)
804 mthca_UNMAP_ICM(dev, dev->eq_table.icm_virt, 1, &status);
805 pci_unmap_page(dev->pdev, dev->eq_table.icm_dma, PAGE_SIZE,
806 PCI_DMA_BIDIRECTIONAL);
807 __free_page(dev->eq_table.icm_page);
810 int mthca_init_eq_table(struct mthca_dev *dev)
817 err = mthca_alloc_init(&dev->eq_table.alloc,
819 dev->limits.num_eqs - 1,
820 dev->limits.reserved_eqs);
824 err = mthca_map_eq_regs(dev);
828 if (dev->mthca_flags & MTHCA_FLAG_MSI_X) {
829 dev->eq_table.clr_mask = 0;
831 dev->eq_table.clr_mask =
832 swab32(1 << (dev->eq_table.inta_pin & 31));
833 dev->eq_table.clr_int = dev->clr_base +
834 (dev->eq_table.inta_pin < 32 ? 4 : 0);
837 dev->eq_table.arm_mask = 0;
839 intr = dev->eq_table.inta_pin;
841 err = mthca_create_eq(dev, dev->limits.num_cqs + MTHCA_NUM_SPARE_EQE,
842 (dev->mthca_flags & MTHCA_FLAG_MSI_X) ? 128 : intr,
843 &dev->eq_table.eq[MTHCA_EQ_COMP]);
847 err = mthca_create_eq(dev, MTHCA_NUM_ASYNC_EQE + MTHCA_NUM_SPARE_EQE,
848 (dev->mthca_flags & MTHCA_FLAG_MSI_X) ? 129 : intr,
849 &dev->eq_table.eq[MTHCA_EQ_ASYNC]);
853 err = mthca_create_eq(dev, MTHCA_NUM_CMD_EQE + MTHCA_NUM_SPARE_EQE,
854 (dev->mthca_flags & MTHCA_FLAG_MSI_X) ? 130 : intr,
855 &dev->eq_table.eq[MTHCA_EQ_CMD]);
859 if (dev->mthca_flags & MTHCA_FLAG_MSI_X) {
860 static const char *eq_name[] = {
861 [MTHCA_EQ_COMP] = DRV_NAME " (comp)",
862 [MTHCA_EQ_ASYNC] = DRV_NAME " (async)",
863 [MTHCA_EQ_CMD] = DRV_NAME " (cmd)"
866 for (i = 0; i < MTHCA_NUM_EQ; ++i) {
867 err = request_irq(dev->eq_table.eq[i].msi_x_vector,
868 mthca_is_memfree(dev) ?
869 mthca_arbel_msi_x_interrupt :
870 mthca_tavor_msi_x_interrupt,
871 0, eq_name[i], dev->eq_table.eq + i);
874 dev->eq_table.eq[i].have_irq = 1;
877 err = request_irq(dev->pdev->irq,
878 mthca_is_memfree(dev) ?
879 mthca_arbel_interrupt :
880 mthca_tavor_interrupt,
881 IRQF_SHARED, DRV_NAME, dev);
884 dev->eq_table.have_irq = 1;
887 err = mthca_MAP_EQ(dev, async_mask(dev),
888 0, dev->eq_table.eq[MTHCA_EQ_ASYNC].eqn, &status);
890 mthca_warn(dev, "MAP_EQ for async EQ %d failed (%d)\n",
891 dev->eq_table.eq[MTHCA_EQ_ASYNC].eqn, err);
893 mthca_warn(dev, "MAP_EQ for async EQ %d returned status 0x%02x\n",
894 dev->eq_table.eq[MTHCA_EQ_ASYNC].eqn, status);
896 err = mthca_MAP_EQ(dev, MTHCA_CMD_EVENT_MASK,
897 0, dev->eq_table.eq[MTHCA_EQ_CMD].eqn, &status);
899 mthca_warn(dev, "MAP_EQ for cmd EQ %d failed (%d)\n",
900 dev->eq_table.eq[MTHCA_EQ_CMD].eqn, err);
902 mthca_warn(dev, "MAP_EQ for cmd EQ %d returned status 0x%02x\n",
903 dev->eq_table.eq[MTHCA_EQ_CMD].eqn, status);
905 for (i = 0; i < MTHCA_NUM_EQ; ++i)
906 if (mthca_is_memfree(dev))
907 arbel_eq_req_not(dev, dev->eq_table.eq[i].eqn_mask);
909 tavor_eq_req_not(dev, dev->eq_table.eq[i].eqn);
914 mthca_free_irqs(dev);
915 mthca_free_eq(dev, &dev->eq_table.eq[MTHCA_EQ_CMD]);
918 mthca_free_eq(dev, &dev->eq_table.eq[MTHCA_EQ_ASYNC]);
921 mthca_free_eq(dev, &dev->eq_table.eq[MTHCA_EQ_COMP]);
924 mthca_unmap_eq_regs(dev);
927 mthca_alloc_cleanup(&dev->eq_table.alloc);
931 void mthca_cleanup_eq_table(struct mthca_dev *dev)
936 mthca_free_irqs(dev);
938 mthca_MAP_EQ(dev, async_mask(dev),
939 1, dev->eq_table.eq[MTHCA_EQ_ASYNC].eqn, &status);
940 mthca_MAP_EQ(dev, MTHCA_CMD_EVENT_MASK,
941 1, dev->eq_table.eq[MTHCA_EQ_CMD].eqn, &status);
943 for (i = 0; i < MTHCA_NUM_EQ; ++i)
944 mthca_free_eq(dev, &dev->eq_table.eq[i]);
946 mthca_unmap_eq_regs(dev);
948 mthca_alloc_cleanup(&dev->eq_table.alloc);