2 * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
3 * Copyright (c) 2005, 2006, 2007 Cisco Systems, Inc. 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/init.h>
35 #include <linux/interrupt.h>
36 #include <linux/dma-mapping.h>
38 #include <linux/mlx4/cmd.h>
44 MLX4_NUM_ASYNC_EQE = 0x100,
45 MLX4_NUM_SPARE_EQE = 0x80,
46 MLX4_EQ_ENTRY_SIZE = 0x20
50 * Must be packed because start is 64 bits but only aligned to 32 bits.
52 struct mlx4_eq_context {
66 __be32 mtt_base_addr_l;
68 __be32 consumer_index;
69 __be32 producer_index;
73 #define MLX4_EQ_STATUS_OK ( 0 << 28)
74 #define MLX4_EQ_STATUS_WRITE_FAIL (10 << 28)
75 #define MLX4_EQ_OWNER_SW ( 0 << 24)
76 #define MLX4_EQ_OWNER_HW ( 1 << 24)
77 #define MLX4_EQ_FLAG_EC ( 1 << 18)
78 #define MLX4_EQ_FLAG_OI ( 1 << 17)
79 #define MLX4_EQ_STATE_ARMED ( 9 << 8)
80 #define MLX4_EQ_STATE_FIRED (10 << 8)
81 #define MLX4_EQ_STATE_ALWAYS_ARMED (11 << 8)
83 #define MLX4_ASYNC_EVENT_MASK ((1ull << MLX4_EVENT_TYPE_PATH_MIG) | \
84 (1ull << MLX4_EVENT_TYPE_COMM_EST) | \
85 (1ull << MLX4_EVENT_TYPE_SQ_DRAINED) | \
86 (1ull << MLX4_EVENT_TYPE_CQ_ERROR) | \
87 (1ull << MLX4_EVENT_TYPE_WQ_CATAS_ERROR) | \
88 (1ull << MLX4_EVENT_TYPE_EEC_CATAS_ERROR) | \
89 (1ull << MLX4_EVENT_TYPE_PATH_MIG_FAILED) | \
90 (1ull << MLX4_EVENT_TYPE_WQ_INVAL_REQ_ERROR) | \
91 (1ull << MLX4_EVENT_TYPE_WQ_ACCESS_ERROR) | \
92 (1ull << MLX4_EVENT_TYPE_PORT_CHANGE) | \
93 (1ull << MLX4_EVENT_TYPE_ECC_DETECT) | \
94 (1ull << MLX4_EVENT_TYPE_SRQ_CATAS_ERROR) | \
95 (1ull << MLX4_EVENT_TYPE_SRQ_QP_LAST_WQE) | \
96 (1ull << MLX4_EVENT_TYPE_SRQ_LIMIT) | \
97 (1ull << MLX4_EVENT_TYPE_CMD))
108 } __attribute__((packed)) comp;
116 } __attribute__((packed)) cmd;
119 } __attribute__((packed)) qp;
122 } __attribute__((packed)) srq;
128 } __attribute__((packed)) cq_err;
132 } __attribute__((packed)) port_change;
136 } __attribute__((packed));
138 static void eq_set_ci(struct mlx4_eq *eq, int req_not)
140 __raw_writel((__force u32) cpu_to_be32((eq->cons_index & 0xffffff) |
143 /* We still want ordering, just not swabbing, so add a barrier */
147 static struct mlx4_eqe *get_eqe(struct mlx4_eq *eq, u32 entry)
149 unsigned long off = (entry & (eq->nent - 1)) * MLX4_EQ_ENTRY_SIZE;
150 return eq->page_list[off / PAGE_SIZE].buf + off % PAGE_SIZE;
153 static struct mlx4_eqe *next_eqe_sw(struct mlx4_eq *eq)
155 struct mlx4_eqe *eqe = get_eqe(eq, eq->cons_index);
156 return !!(eqe->owner & 0x80) ^ !!(eq->cons_index & eq->nent) ? NULL : eqe;
159 static int mlx4_eq_int(struct mlx4_dev *dev, struct mlx4_eq *eq)
161 struct mlx4_eqe *eqe;
166 while ((eqe = next_eqe_sw(eq))) {
168 * Make sure we read EQ entry contents after we've
169 * checked the ownership bit.
174 case MLX4_EVENT_TYPE_COMP:
175 cqn = be32_to_cpu(eqe->event.comp.cqn) & 0xffffff;
176 mlx4_cq_completion(dev, cqn);
179 case MLX4_EVENT_TYPE_PATH_MIG:
180 case MLX4_EVENT_TYPE_COMM_EST:
181 case MLX4_EVENT_TYPE_SQ_DRAINED:
182 case MLX4_EVENT_TYPE_SRQ_QP_LAST_WQE:
183 case MLX4_EVENT_TYPE_WQ_CATAS_ERROR:
184 case MLX4_EVENT_TYPE_PATH_MIG_FAILED:
185 case MLX4_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
186 case MLX4_EVENT_TYPE_WQ_ACCESS_ERROR:
187 mlx4_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
191 case MLX4_EVENT_TYPE_SRQ_LIMIT:
192 case MLX4_EVENT_TYPE_SRQ_CATAS_ERROR:
193 mlx4_srq_event(dev, be32_to_cpu(eqe->event.srq.srqn) & 0xffffff,
197 case MLX4_EVENT_TYPE_CMD:
199 be16_to_cpu(eqe->event.cmd.token),
200 eqe->event.cmd.status,
201 be64_to_cpu(eqe->event.cmd.out_param));
204 case MLX4_EVENT_TYPE_PORT_CHANGE:
205 mlx4_dispatch_event(dev,
206 eqe->subtype == MLX4_PORT_CHANGE_SUBTYPE_ACTIVE ?
207 MLX4_DEV_EVENT_PORT_UP :
208 MLX4_DEV_EVENT_PORT_DOWN,
209 be32_to_cpu(eqe->event.port_change.port) >> 28);
212 case MLX4_EVENT_TYPE_CQ_ERROR:
213 mlx4_warn(dev, "CQ %s on CQN %06x\n",
214 eqe->event.cq_err.syndrome == 1 ?
215 "overrun" : "access violation",
216 be32_to_cpu(eqe->event.cq_err.cqn) & 0xffffff);
217 mlx4_cq_event(dev, be32_to_cpu(eqe->event.cq_err.cqn),
221 case MLX4_EVENT_TYPE_EQ_OVERFLOW:
222 mlx4_warn(dev, "EQ overrun on EQN %d\n", eq->eqn);
225 case MLX4_EVENT_TYPE_EEC_CATAS_ERROR:
226 case MLX4_EVENT_TYPE_ECC_DETECT:
228 mlx4_warn(dev, "Unhandled event %02x(%02x) on EQ %d at index %u\n",
229 eqe->type, eqe->subtype, eq->eqn, eq->cons_index);
238 * The HCA will think the queue has overflowed if we
239 * don't tell it we've been processing events. We
240 * create our EQs with MLX4_NUM_SPARE_EQE extra
241 * entries, so we must update our consumer index at
244 if (unlikely(set_ci >= MLX4_NUM_SPARE_EQE)) {
246 * Conditional on hca_type is OK here because
247 * this is a rare case, not the fast path.
259 static irqreturn_t mlx4_interrupt(int irq, void *dev_ptr)
261 struct mlx4_dev *dev = dev_ptr;
262 struct mlx4_priv *priv = mlx4_priv(dev);
266 writel(priv->eq_table.clr_mask, priv->eq_table.clr_int);
268 for (i = 0; i < MLX4_NUM_EQ; ++i)
269 work |= mlx4_eq_int(dev, &priv->eq_table.eq[i]);
271 return IRQ_RETVAL(work);
274 static irqreturn_t mlx4_msi_x_interrupt(int irq, void *eq_ptr)
276 struct mlx4_eq *eq = eq_ptr;
277 struct mlx4_dev *dev = eq->dev;
279 mlx4_eq_int(dev, eq);
281 /* MSI-X vectors always belong to us */
285 static int mlx4_MAP_EQ(struct mlx4_dev *dev, u64 event_mask, int unmap,
288 return mlx4_cmd(dev, event_mask, (unmap << 31) | eq_num,
289 0, MLX4_CMD_MAP_EQ, MLX4_CMD_TIME_CLASS_B);
292 static int mlx4_SW2HW_EQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
295 return mlx4_cmd(dev, mailbox->dma, eq_num, 0, MLX4_CMD_SW2HW_EQ,
296 MLX4_CMD_TIME_CLASS_A);
299 static int mlx4_HW2SW_EQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
302 return mlx4_cmd_box(dev, 0, mailbox->dma, eq_num, 0, MLX4_CMD_HW2SW_EQ,
303 MLX4_CMD_TIME_CLASS_A);
306 static void __iomem *mlx4_get_eq_uar(struct mlx4_dev *dev, struct mlx4_eq *eq)
308 struct mlx4_priv *priv = mlx4_priv(dev);
311 index = eq->eqn / 4 - dev->caps.reserved_eqs / 4;
313 if (!priv->eq_table.uar_map[index]) {
314 priv->eq_table.uar_map[index] =
315 ioremap(pci_resource_start(dev->pdev, 2) +
316 ((eq->eqn / 4) << PAGE_SHIFT),
318 if (!priv->eq_table.uar_map[index]) {
319 mlx4_err(dev, "Couldn't map EQ doorbell for EQN 0x%06x\n",
325 return priv->eq_table.uar_map[index] + 0x800 + 8 * (eq->eqn % 4);
328 static int mlx4_create_eq(struct mlx4_dev *dev, int nent,
329 u8 intr, struct mlx4_eq *eq)
331 struct mlx4_priv *priv = mlx4_priv(dev);
332 struct mlx4_cmd_mailbox *mailbox;
333 struct mlx4_eq_context *eq_context;
335 u64 *dma_list = NULL;
342 eq->nent = roundup_pow_of_two(max(nent, 2));
343 npages = PAGE_ALIGN(eq->nent * MLX4_EQ_ENTRY_SIZE) / PAGE_SIZE;
345 eq->page_list = kmalloc(npages * sizeof *eq->page_list,
350 for (i = 0; i < npages; ++i)
351 eq->page_list[i].buf = NULL;
353 dma_list = kmalloc(npages * sizeof *dma_list, GFP_KERNEL);
357 mailbox = mlx4_alloc_cmd_mailbox(dev);
360 eq_context = mailbox->buf;
362 for (i = 0; i < npages; ++i) {
363 eq->page_list[i].buf = dma_alloc_coherent(&dev->pdev->dev,
364 PAGE_SIZE, &t, GFP_KERNEL);
365 if (!eq->page_list[i].buf)
366 goto err_out_free_pages;
369 eq->page_list[i].map = t;
371 memset(eq->page_list[i].buf, 0, PAGE_SIZE);
374 eq->eqn = mlx4_bitmap_alloc(&priv->eq_table.bitmap);
376 goto err_out_free_pages;
378 eq->doorbell = mlx4_get_eq_uar(dev, eq);
381 goto err_out_free_eq;
384 err = mlx4_mtt_init(dev, npages, PAGE_SHIFT, &eq->mtt);
386 goto err_out_free_eq;
388 err = mlx4_write_mtt(dev, &eq->mtt, 0, npages, dma_list);
390 goto err_out_free_mtt;
392 memset(eq_context, 0, sizeof *eq_context);
393 eq_context->flags = cpu_to_be32(MLX4_EQ_STATUS_OK |
394 MLX4_EQ_STATE_ARMED);
395 eq_context->log_eq_size = ilog2(eq->nent);
396 eq_context->intr = intr;
397 eq_context->log_page_size = PAGE_SHIFT - MLX4_ICM_PAGE_SHIFT;
399 mtt_addr = mlx4_mtt_addr(dev, &eq->mtt);
400 eq_context->mtt_base_addr_h = mtt_addr >> 32;
401 eq_context->mtt_base_addr_l = cpu_to_be32(mtt_addr & 0xffffffff);
403 err = mlx4_SW2HW_EQ(dev, mailbox, eq->eqn);
405 mlx4_warn(dev, "SW2HW_EQ failed (%d)\n", err);
406 goto err_out_free_mtt;
410 mlx4_free_cmd_mailbox(dev, mailbox);
417 mlx4_mtt_cleanup(dev, &eq->mtt);
420 mlx4_bitmap_free(&priv->eq_table.bitmap, eq->eqn);
423 for (i = 0; i < npages; ++i)
424 if (eq->page_list[i].buf)
425 dma_free_coherent(&dev->pdev->dev, PAGE_SIZE,
426 eq->page_list[i].buf,
427 eq->page_list[i].map);
429 mlx4_free_cmd_mailbox(dev, mailbox);
432 kfree(eq->page_list);
439 static void mlx4_free_eq(struct mlx4_dev *dev,
442 struct mlx4_priv *priv = mlx4_priv(dev);
443 struct mlx4_cmd_mailbox *mailbox;
445 int npages = PAGE_ALIGN(MLX4_EQ_ENTRY_SIZE * eq->nent) / PAGE_SIZE;
448 mailbox = mlx4_alloc_cmd_mailbox(dev);
452 err = mlx4_HW2SW_EQ(dev, mailbox, eq->eqn);
454 mlx4_warn(dev, "HW2SW_EQ failed (%d)\n", err);
457 mlx4_dbg(dev, "Dumping EQ context %02x:\n", eq->eqn);
458 for (i = 0; i < sizeof (struct mlx4_eq_context) / 4; ++i) {
460 printk("[%02x] ", i * 4);
461 printk(" %08x", be32_to_cpup(mailbox->buf + i * 4));
462 if ((i + 1) % 4 == 0)
467 mlx4_mtt_cleanup(dev, &eq->mtt);
468 for (i = 0; i < npages; ++i)
469 pci_free_consistent(dev->pdev, PAGE_SIZE,
470 eq->page_list[i].buf,
471 eq->page_list[i].map);
473 kfree(eq->page_list);
474 mlx4_bitmap_free(&priv->eq_table.bitmap, eq->eqn);
475 mlx4_free_cmd_mailbox(dev, mailbox);
478 static void mlx4_free_irqs(struct mlx4_dev *dev)
480 struct mlx4_eq_table *eq_table = &mlx4_priv(dev)->eq_table;
483 if (eq_table->have_irq)
484 free_irq(dev->pdev->irq, dev);
485 for (i = 0; i < MLX4_NUM_EQ; ++i)
486 if (eq_table->eq[i].have_irq)
487 free_irq(eq_table->eq[i].irq, eq_table->eq + i);
490 static int mlx4_map_clr_int(struct mlx4_dev *dev)
492 struct mlx4_priv *priv = mlx4_priv(dev);
494 priv->clr_base = ioremap(pci_resource_start(dev->pdev, priv->fw.clr_int_bar) +
495 priv->fw.clr_int_base, MLX4_CLR_INT_SIZE);
496 if (!priv->clr_base) {
497 mlx4_err(dev, "Couldn't map interrupt clear register, aborting.\n");
504 static void mlx4_unmap_clr_int(struct mlx4_dev *dev)
506 struct mlx4_priv *priv = mlx4_priv(dev);
508 iounmap(priv->clr_base);
511 int mlx4_map_eq_icm(struct mlx4_dev *dev, u64 icm_virt)
513 struct mlx4_priv *priv = mlx4_priv(dev);
517 * We assume that mapping one page is enough for the whole EQ
518 * context table. This is fine with all current HCAs, because
519 * we only use 32 EQs and each EQ uses 64 bytes of context
520 * memory, or 1 KB total.
522 priv->eq_table.icm_virt = icm_virt;
523 priv->eq_table.icm_page = alloc_page(GFP_HIGHUSER);
524 if (!priv->eq_table.icm_page)
526 priv->eq_table.icm_dma = pci_map_page(dev->pdev, priv->eq_table.icm_page, 0,
527 PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
528 if (pci_dma_mapping_error(priv->eq_table.icm_dma)) {
529 __free_page(priv->eq_table.icm_page);
533 ret = mlx4_MAP_ICM_page(dev, priv->eq_table.icm_dma, icm_virt);
535 pci_unmap_page(dev->pdev, priv->eq_table.icm_dma, PAGE_SIZE,
536 PCI_DMA_BIDIRECTIONAL);
537 __free_page(priv->eq_table.icm_page);
543 void mlx4_unmap_eq_icm(struct mlx4_dev *dev)
545 struct mlx4_priv *priv = mlx4_priv(dev);
547 mlx4_UNMAP_ICM(dev, priv->eq_table.icm_virt, 1);
548 pci_unmap_page(dev->pdev, priv->eq_table.icm_dma, PAGE_SIZE,
549 PCI_DMA_BIDIRECTIONAL);
550 __free_page(priv->eq_table.icm_page);
553 int mlx4_init_eq_table(struct mlx4_dev *dev)
555 struct mlx4_priv *priv = mlx4_priv(dev);
559 err = mlx4_bitmap_init(&priv->eq_table.bitmap, dev->caps.num_eqs,
560 dev->caps.num_eqs - 1, dev->caps.reserved_eqs);
564 for (i = 0; i < ARRAY_SIZE(priv->eq_table.uar_map); ++i)
565 priv->eq_table.uar_map[i] = NULL;
567 err = mlx4_map_clr_int(dev);
571 priv->eq_table.clr_mask =
572 swab32(1 << (priv->eq_table.inta_pin & 31));
573 priv->eq_table.clr_int = priv->clr_base +
574 (priv->eq_table.inta_pin < 32 ? 4 : 0);
576 err = mlx4_create_eq(dev, dev->caps.num_cqs + MLX4_NUM_SPARE_EQE,
577 (dev->flags & MLX4_FLAG_MSI_X) ? MLX4_EQ_COMP : 0,
578 &priv->eq_table.eq[MLX4_EQ_COMP]);
582 err = mlx4_create_eq(dev, MLX4_NUM_ASYNC_EQE + MLX4_NUM_SPARE_EQE,
583 (dev->flags & MLX4_FLAG_MSI_X) ? MLX4_EQ_ASYNC : 0,
584 &priv->eq_table.eq[MLX4_EQ_ASYNC]);
588 if (dev->flags & MLX4_FLAG_MSI_X) {
589 static const char *eq_name[] = {
590 [MLX4_EQ_COMP] = DRV_NAME " (comp)",
591 [MLX4_EQ_ASYNC] = DRV_NAME " (async)"
594 for (i = 0; i < MLX4_NUM_EQ; ++i) {
595 err = request_irq(priv->eq_table.eq[i].irq,
596 mlx4_msi_x_interrupt,
597 0, eq_name[i], priv->eq_table.eq + i);
601 priv->eq_table.eq[i].have_irq = 1;
605 err = request_irq(dev->pdev->irq, mlx4_interrupt,
606 IRQF_SHARED, DRV_NAME, dev);
610 priv->eq_table.have_irq = 1;
613 err = mlx4_MAP_EQ(dev, MLX4_ASYNC_EVENT_MASK, 0,
614 priv->eq_table.eq[MLX4_EQ_ASYNC].eqn);
616 mlx4_warn(dev, "MAP_EQ for async EQ %d failed (%d)\n",
617 priv->eq_table.eq[MLX4_EQ_ASYNC].eqn, err);
619 for (i = 0; i < MLX4_NUM_EQ; ++i)
620 eq_set_ci(&priv->eq_table.eq[i], 1);
625 mlx4_free_eq(dev, &priv->eq_table.eq[MLX4_EQ_ASYNC]);
628 mlx4_free_eq(dev, &priv->eq_table.eq[MLX4_EQ_COMP]);
631 mlx4_unmap_clr_int(dev);
635 mlx4_bitmap_cleanup(&priv->eq_table.bitmap);
639 void mlx4_cleanup_eq_table(struct mlx4_dev *dev)
641 struct mlx4_priv *priv = mlx4_priv(dev);
644 mlx4_MAP_EQ(dev, MLX4_ASYNC_EVENT_MASK, 1,
645 priv->eq_table.eq[MLX4_EQ_ASYNC].eqn);
649 for (i = 0; i < MLX4_NUM_EQ; ++i)
650 mlx4_free_eq(dev, &priv->eq_table.eq[i]);
652 mlx4_unmap_clr_int(dev);
654 for (i = 0; i < ARRAY_SIZE(priv->eq_table.uar_map); ++i)
655 if (priv->eq_table.uar_map[i])
656 iounmap(priv->eq_table.uar_map[i]);
658 mlx4_bitmap_cleanup(&priv->eq_table.bitmap);