/* * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved. * Copyright (c) 2005 Mellanox Technologies. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the * OpenIB.org BSD license below: * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * - Redistributions of source code must retain the above * copyright notice, this list of conditions and the following * disclaimer. * * - Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. * * $Id: mthca_eq.c 1382 2004-12-24 02:21:02Z roland $ */ #include <linux/init.h> #include <linux/errno.h> #include <linux/interrupt.h> #include <linux/pci.h> #include "mthca_dev.h" #include "mthca_cmd.h" #include "mthca_config_reg.h" enum { MTHCA_NUM_ASYNC_EQE = 0x80, MTHCA_NUM_CMD_EQE = 0x80, MTHCA_EQ_ENTRY_SIZE = 0x20 }; /* * Must be packed because start is 64 bits but only aligned to 32 bits. */ struct mthca_eq_context { __be32 flags; __be64 start; __be32 logsize_usrpage; __be32 tavor_pd; /* reserved for Arbel */ u8 reserved1[3]; u8 intr; __be32 arbel_pd; /* lost_count for Tavor */ __be32 lkey; u32 reserved2[2]; __be32 consumer_index; __be32 producer_index; u32 reserved3[4]; } __attribute__((packed)); #define MTHCA_EQ_STATUS_OK ( 0 << 28) #define MTHCA_EQ_STATUS_OVERFLOW ( 9 << 28) #define MTHCA_EQ_STATUS_WRITE_FAIL (10 << 28) #define MTHCA_EQ_OWNER_SW ( 0 << 24) #define MTHCA_EQ_OWNER_HW ( 1 << 24) #define MTHCA_EQ_FLAG_TR ( 1 << 18) #define MTHCA_EQ_FLAG_OI ( 1 << 17) #define MTHCA_EQ_STATE_ARMED ( 1 << 8) #define MTHCA_EQ_STATE_FIRED ( 2 << 8) #define MTHCA_EQ_STATE_ALWAYS_ARMED ( 3 << 8) #define MTHCA_EQ_STATE_ARBEL ( 8 << 8) enum { MTHCA_EVENT_TYPE_COMP = 0x00, MTHCA_EVENT_TYPE_PATH_MIG = 0x01, MTHCA_EVENT_TYPE_COMM_EST = 0x02, MTHCA_EVENT_TYPE_SQ_DRAINED = 0x03, MTHCA_EVENT_TYPE_SRQ_LAST_WQE = 0x13, MTHCA_EVENT_TYPE_CQ_ERROR = 0x04, MTHCA_EVENT_TYPE_WQ_CATAS_ERROR = 0x05, MTHCA_EVENT_TYPE_EEC_CATAS_ERROR = 0x06, MTHCA_EVENT_TYPE_PATH_MIG_FAILED = 0x07, MTHCA_EVENT_TYPE_WQ_INVAL_REQ_ERROR = 0x10, MTHCA_EVENT_TYPE_WQ_ACCESS_ERROR = 0x11, MTHCA_EVENT_TYPE_SRQ_CATAS_ERROR = 0x12, MTHCA_EVENT_TYPE_LOCAL_CATAS_ERROR = 0x08, MTHCA_EVENT_TYPE_PORT_CHANGE = 0x09, MTHCA_EVENT_TYPE_EQ_OVERFLOW = 0x0f, MTHCA_EVENT_TYPE_ECC_DETECT = 0x0e, MTHCA_EVENT_TYPE_CMD = 0x0a }; #define MTHCA_ASYNC_EVENT_MASK ((1ULL << MTHCA_EVENT_TYPE_PATH_MIG) | \ (1ULL << MTHCA_EVENT_TYPE_COMM_EST) | \ (1ULL << MTHCA_EVENT_TYPE_SQ_DRAINED) | \ (1ULL << MTHCA_EVENT_TYPE_CQ_ERROR) | \ (1ULL << MTHCA_EVENT_TYPE_WQ_CATAS_ERROR) | \ (1ULL << MTHCA_EVENT_TYPE_EEC_CATAS_ERROR) | \ (1ULL << MTHCA_EVENT_TYPE_PATH_MIG_FAILED) | \ (1ULL << MTHCA_EVENT_TYPE_WQ_INVAL_REQ_ERROR) | \ (1ULL << MTHCA_EVENT_TYPE_WQ_ACCESS_ERROR) | \ (1ULL << MTHCA_EVENT_TYPE_LOCAL_CATAS_ERROR) | \ (1ULL << MTHCA_EVENT_TYPE_PORT_CHANGE) | \ (1ULL << MTHCA_EVENT_TYPE_ECC_DETECT)) #define MTHCA_SRQ_EVENT_MASK (1ULL << MTHCA_EVENT_TYPE_SRQ_CATAS_ERROR) | \ (1ULL << MTHCA_EVENT_TYPE_SRQ_LAST_WQE) #define MTHCA_CMD_EVENT_MASK (1ULL << MTHCA_EVENT_TYPE_CMD) #define MTHCA_EQ_DB_INC_CI (1 << 24) #define MTHCA_EQ_DB_REQ_NOT (2 << 24) #define MTHCA_EQ_DB_DISARM_CQ (3 << 24) #define MTHCA_EQ_DB_SET_CI (4 << 24) #define MTHCA_EQ_DB_ALWAYS_ARM (5 << 24) struct mthca_eqe { u8 reserved1; u8 type; u8 reserved2; u8 subtype; union { u32 raw[6]; struct { __be32 cqn; } __attribute__((packed)) comp; struct { u16 reserved1; __be16 token; u32 reserved2; u8 reserved3[3]; u8 status; __be64 out_param; } __attribute__((packed)) cmd; struct { __be32 qpn; } __attribute__((packed)) qp; struct { __be32 cqn; u32 reserved1; u8 reserved2[3]; u8 syndrome; } __attribute__((packed)) cq_err; struct { u32 reserved1[2]; __be32 port; } __attribute__((packed)) port_change; } event; u8 reserved3[3]; u8 owner; } __attribute__((packed)); #define MTHCA_EQ_ENTRY_OWNER_SW (0 << 7) #define MTHCA_EQ_ENTRY_OWNER_HW (1 << 7) static inline u64 async_mask(struct mthca_dev *dev) { return dev->mthca_flags & MTHCA_FLAG_SRQ ? MTHCA_ASYNC_EVENT_MASK | MTHCA_SRQ_EVENT_MASK : MTHCA_ASYNC_EVENT_MASK; } static inline void tavor_set_eq_ci(struct mthca_dev *dev, struct mthca_eq *eq, u32 ci) { __be32 doorbell[2]; doorbell[0] = cpu_to_be32(MTHCA_EQ_DB_SET_CI | eq->eqn); doorbell[1] = cpu_to_be32(ci & (eq->nent - 1)); /* * This barrier makes sure that all updates to ownership bits * done by set_eqe_hw() hit memory before the consumer index * is updated. set_eq_ci() allows the HCA to possibly write * more EQ entries, and we want to avoid the exceedingly * unlikely possibility of the HCA writing an entry and then * having set_eqe_hw() overwrite the owner field. */ wmb(); mthca_write64(doorbell, dev->kar + MTHCA_EQ_DOORBELL, MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock)); } static inline void arbel_set_eq_ci(struct mthca_dev *dev, struct mthca_eq *eq, u32 ci) { /* See comment in tavor_set_eq_ci() above. */ wmb(); __raw_writel((__force u32) cpu_to_be32(ci), dev->eq_regs.arbel.eq_set_ci_base + eq->eqn * 8); /* We still want ordering, just not swabbing, so add a barrier */ mb(); } static inline void set_eq_ci(struct mthca_dev *dev, struct mthca_eq *eq, u32 ci) { if (mthca_is_memfree(dev)) arbel_set_eq_ci(dev, eq, ci); else tavor_set_eq_ci(dev, eq, ci); } static inline void tavor_eq_req_not(struct mthca_dev *dev, int eqn) { __be32 doorbell[2]; doorbell[0] = cpu_to_be32(MTHCA_EQ_DB_REQ_NOT | eqn); doorbell[1] = 0; mthca_write64(doorbell, dev->kar + MTHCA_EQ_DOORBELL, MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock)); } static inline void arbel_eq_req_not(struct mthca_dev *dev, u32 eqn_mask) { writel(eqn_mask, dev->eq_regs.arbel.eq_arm); } static inline void disarm_cq(struct mthca_dev *dev, int eqn, int cqn) { if (!mthca_is_memfree(dev)) { __be32 doorbell[2]; doorbell[0] = cpu_to_be32(MTHCA_EQ_DB_DISARM_CQ | eqn); doorbell[1] = cpu_to_be32(cqn); mthca_write64(doorbell, dev->kar + MTHCA_EQ_DOORBELL, MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock)); } } static inline struct mthca_eqe *get_eqe(struct mthca_eq *eq, u32 entry) { unsigned long off = (entry & (eq->nent - 1)) * MTHCA_EQ_ENTRY_SIZE; return eq->page_list[off / PAGE_SIZE].buf + off % PAGE_SIZE; } static inline struct mthca_eqe* next_eqe_sw(struct mthca_eq *eq) { struct mthca_eqe* eqe; eqe = get_eqe(eq, eq->cons_index); return (MTHCA_EQ_ENTRY_OWNER_HW & eqe->owner) ? NULL : eqe; } static inline void set_eqe_hw(struct mthca_eqe *eqe) { eqe->owner = MTHCA_EQ_ENTRY_OWNER_HW; } static void port_change(struct mthca_dev *dev, int port, int active) { struct ib_event record; mthca_dbg(dev, "Port change to %s for port %d\n", active ? "active" : "down", port); record.device = &dev->ib_dev; record.event = active ? IB_EVENT_PORT_ACTIVE : IB_EVENT_PORT_ERR; record.element.port_num = port; ib_dispatch_event(&record); } static int mthca_eq_int(struct mthca_dev *dev, struct mthca_eq *eq) { struct mthca_eqe *eqe; int disarm_cqn; int eqes_found = 0; while ((eqe = next_eqe_sw(eq))) { int set_ci = 0; /* * Make sure we read EQ entry contents after we've * checked the ownership bit. */ rmb(); switch (eqe->type) { case MTHCA_EVENT_TYPE_COMP: disarm_cqn = be32_to_cpu(eqe->event.comp.cqn) & 0xffffff; disarm_cq(dev, eq->eqn, disarm_cqn); mthca_cq_event(dev, disarm_cqn); break; case MTHCA_EVENT_TYPE_PATH_MIG: mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff, IB_EVENT_PATH_MIG); break; case MTHCA_EVENT_TYPE_COMM_EST: mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff, IB_EVENT_COMM_EST); break; case MTHCA_EVENT_TYPE_SQ_DRAINED: mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff, IB_EVENT_SQ_DRAINED); break; case MTHCA_EVENT_TYPE_WQ_CATAS_ERROR: mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff, IB_EVENT_QP_FATAL); break; case MTHCA_EVENT_TYPE_PATH_MIG_FAILED: mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff, IB_EVENT_PATH_MIG_ERR); break; case MTHCA_EVENT_TYPE_WQ_INVAL_REQ_ERROR: mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff, IB_EVENT_QP_REQ_ERR); break; case MTHCA_EVENT_TYPE_WQ_ACCESS_ERROR: mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff, IB_EVENT_QP_ACCESS_ERR); break; case MTHCA_EVENT_TYPE_CMD: mthca_cmd_event(dev, be16_to_cpu(eqe->event.cmd.token), eqe->event.cmd.status, be64_to_cpu(eqe->event.cmd.out_param)); /* * cmd_event() may add more commands. * The card will think the queue has overflowed if * we don't tell it we've been processing events. */ set_ci = 1; break; case MTHCA_EVENT_TYPE_PORT_CHANGE: port_change(dev, (be32_to_cpu(eqe->event.port_change.port) >> 28) & 3, eqe->subtype == 0x4); break; case MTHCA_EVENT_TYPE_CQ_ERROR: mthca_warn(dev, "CQ %s on CQN %06x\n", eqe->event.cq_err.syndrome == 1 ? "overrun" : "access violation", be32_to_cpu(eqe->event.cq_err.cqn) & 0xffffff); break; case MTHCA_EVENT_TYPE_EQ_OVERFLOW: mthca_warn(dev, "EQ overrun on EQN %d\n", eq->eqn); break; case MTHCA_EVENT_TYPE_EEC_CATAS_ERROR: case MTHCA_EVENT_TYPE_SRQ_CATAS_ERROR: case MTHCA_EVENT_TYPE_LOCAL_CATAS_ERROR: case MTHCA_EVENT_TYPE_ECC_DETECT: default: mthca_warn(dev, "Unhandled event %02x(%02x) on EQ %d\n", eqe->type, eqe->subtype, eq->eqn); break; }; set_eqe_hw(eqe); ++eq->cons_index; eqes_found = 1; if (unlikely(set_ci)) { /* * Conditional on hca_type is OK here because * this is a rare case, not the fast path. */ set_eq_ci(dev, eq, eq->cons_index); set_ci = 0; } } /* * Rely on caller to set consumer index so that we don't have * to test hca_type in our interrupt handling fast path. */ return eqes_found; } static irqreturn_t mthca_tavor_interrupt(int irq, void *dev_ptr, struct pt_regs *regs) { struct mthca_dev *dev = dev_ptr; u32 ecr; int i; if (dev->eq_table.clr_mask) writel(dev->eq_table.clr_mask, dev->eq_table.clr_int); ecr = readl(dev->eq_regs.tavor.ecr_base + 4); if (ecr) { writel(ecr, dev->eq_regs.tavor.ecr_base + MTHCA_ECR_CLR_BASE - MTHCA_ECR_BASE + 4); for (i = 0; i < MTHCA_NUM_EQ; ++i) if (ecr & dev->eq_table.eq[i].eqn_mask && mthca_eq_int(dev, &dev->eq_table.eq[i])) { tavor_set_eq_ci(dev, &dev->eq_table.eq[i], dev->eq_table.eq[i].cons_index); tavor_eq_req_not(dev, dev->eq_table.eq[i].eqn); } } return IRQ_RETVAL(ecr); } static irqreturn_t mthca_tavor_msi_x_interrupt(int irq, void *eq_ptr, struct pt_regs *regs) { struct mthca_eq *eq = eq_ptr; struct mthca_dev *dev = eq->dev; mthca_eq_int(dev, eq); tavor_set_eq_ci(dev, eq, eq->cons_index); tavor_eq_req_not(dev, eq->eqn); /* MSI-X vectors always belong to us */ return IRQ_HANDLED; } static irqreturn_t mthca_arbel_interrupt(int irq, void *dev_ptr, struct pt_regs *regs) { struct mthca_dev *dev = dev_ptr; int work = 0; int i; if (dev->eq_table.clr_mask) writel(dev->eq_table.clr_mask, dev->eq_table.clr_int); for (i = 0; i < MTHCA_NUM_EQ; ++i) if (mthca_eq_int(dev, &dev->eq_table.eq[i])) { work = 1; arbel_set_eq_ci(dev, &dev->eq_table.eq[i], dev->eq_table.eq[i].cons_index); } arbel_eq_req_not(dev, dev->eq_table.arm_mask); return IRQ_RETVAL(work); } static irqreturn_t mthca_arbel_msi_x_interrupt(int irq, void *eq_ptr, struct pt_regs *regs) { struct mthca_eq *eq = eq_ptr; struct mthca_dev *dev = eq->dev; mthca_eq_int(dev, eq); arbel_set_eq_ci(dev, eq, eq->cons_index); arbel_eq_req_not(dev, eq->eqn_mask); /* MSI-X vectors always belong to us */ return IRQ_HANDLED; } static int __devinit mthca_create_eq(struct mthca_dev *dev, int nent, u8 intr, struct mthca_eq *eq) { int npages = (nent * MTHCA_EQ_ENTRY_SIZE + PAGE_SIZE - 1) / PAGE_SIZE; u64 *dma_list = NULL; dma_addr_t t; struct mthca_mailbox *mailbox; struct mthca_eq_context *eq_context; int err = -ENOMEM; int i; u8 status; /* Make sure EQ size is aligned to a power of 2 size. */ for (i = 1; i < nent; i <<= 1) ; /* nothing */ nent = i; eq->dev = dev; eq->page_list = kmalloc(npages * sizeof *eq->page_list, GFP_KERNEL); if (!eq->page_list) goto err_out; for (i = 0; i < npages; ++i) eq->page_list[i].buf = NULL; dma_list = kmalloc(npages * sizeof *dma_list, GFP_KERNEL); if (!dma_list) goto err_out_free; mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); if (IS_ERR(mailbox)) goto err_out_free; eq_context = mailbox->buf; for (i = 0; i < npages; ++i) { eq->page_list[i].buf = dma_alloc_coherent(&dev->pdev->dev, PAGE_SIZE, &t, GFP_KERNEL); if (!eq->page_list[i].buf) goto err_out_free_pages; dma_list[i] = t; pci_unmap_addr_set(&eq->page_list[i], mapping, t); memset(eq->page_list[i].buf, 0, PAGE_SIZE); } for (i = 0; i < nent; ++i) set_eqe_hw(get_eqe(eq, i)); eq->eqn = mthca_alloc(&dev->eq_table.alloc); if (eq->eqn == -1) goto err_out_free_pages; err = mthca_mr_alloc_phys(dev, dev->driver_pd.pd_num, dma_list, PAGE_SHIFT, npages, 0, npages * PAGE_SIZE, MTHCA_MPT_FLAG_LOCAL_WRITE | MTHCA_MPT_FLAG_LOCAL_READ, &eq->mr); if (err) goto err_out_free_eq; eq->nent = nent; memset(eq_context, 0, sizeof *eq_context); eq_context->flags = cpu_to_be32(MTHCA_EQ_STATUS_OK | MTHCA_EQ_OWNER_HW | MTHCA_EQ_STATE_ARMED | MTHCA_EQ_FLAG_TR); if (mthca_is_memfree(dev)) eq_context->flags |= cpu_to_be32(MTHCA_EQ_STATE_ARBEL); eq_context->logsize_usrpage = cpu_to_be32((ffs(nent) - 1) << 24); if (mthca_is_memfree(dev)) { eq_context->arbel_pd = cpu_to_be32(dev->driver_pd.pd_num); } else { eq_context->logsize_usrpage |= cpu_to_be32(dev->driver_uar.index); eq_context->tavor_pd = cpu_to_be32(dev->driver_pd.pd_num); } eq_context->intr = intr; eq_context->lkey = cpu_to_be32(eq->mr.ibmr.lkey); err = mthca_SW2HW_EQ(dev, mailbox, eq->eqn, &status); if (err) { mthca_warn(dev, "SW2HW_EQ failed (%d)\n", err); goto err_out_free_mr; } if (status) { mthca_warn(dev, "SW2HW_EQ returned status 0x%02x\n", status); err = -EINVAL; goto err_out_free_mr; } kfree(dma_list); mthca_free_mailbox(dev, mailbox); eq->eqn_mask = swab32(1 << eq->eqn); eq->cons_index = 0; dev->eq_table.arm_mask |= eq->eqn_mask; mthca_dbg(dev, "Allocated EQ %d with %d entries\n", eq->eqn, nent); return err; err_out_free_mr: mthca_free_mr(dev, &eq->mr); err_out_free_eq: mthca_free(&dev->eq_table.alloc, eq->eqn); err_out_free_pages: for (i = 0; i < npages; ++i) if (eq->page_list[i].buf) dma_free_coherent(&dev->pdev->dev, PAGE_SIZE, eq->page_list[i].buf, pci_unmap_addr(&eq->page_list[i], mapping)); mthca_free_mailbox(dev, mailbox); err_out_free: kfree(eq->page_list); kfree(dma_list); err_out: return err; } static void mthca_free_eq(struct mthca_dev *dev, struct mthca_eq *eq) { struct mthca_mailbox *mailbox; int err; u8 status; int npages = (eq->nent * MTHCA_EQ_ENTRY_SIZE + PAGE_SIZE - 1) / PAGE_SIZE; int i; mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); if (IS_ERR(mailbox)) return; err = mthca_HW2SW_EQ(dev, mailbox, eq->eqn, &status); if (err) mthca_warn(dev, "HW2SW_EQ failed (%d)\n", err); if (status) mthca_warn(dev, "HW2SW_EQ returned status 0x%02x\n", status); dev->eq_table.arm_mask &= ~eq->eqn_mask; if (0) { mthca_dbg(dev, "Dumping EQ context %02x:\n", eq->eqn); for (i = 0; i < sizeof (struct mthca_eq_context) / 4; ++i) { if (i % 4 == 0) printk("[%02x] ", i * 4); printk(" %08x", be32_to_cpup(mailbox->buf + i * 4)); if ((i + 1) % 4 == 0) printk("\n"); } } mthca_free_mr(dev, &eq->mr); for (i = 0; i < npages; ++i) pci_free_consistent(dev->pdev, PAGE_SIZE, eq->page_list[i].buf, pci_unmap_addr(&eq->page_list[i], mapping)); kfree(eq->page_list); mthca_free_mailbox(dev, mailbox); } static void mthca_free_irqs(struct mthca_dev *dev) { int i; if (dev->eq_table.have_irq) free_irq(dev->pdev->irq, dev); for (i = 0; i < MTHCA_NUM_EQ; ++i) if (dev->eq_table.eq[i].have_irq) free_irq(dev->eq_table.eq[i].msi_x_vector, dev->eq_table.eq + i); } static int __devinit mthca_map_reg(struct mthca_dev *dev, unsigned long offset, unsigned long size, void __iomem **map) { unsigned long base = pci_resource_start(dev->pdev, 0); if (!request_mem_region(base + offset, size, DRV_NAME)) return -EBUSY; *map = ioremap(base + offset, size); if (!*map) { release_mem_region(base + offset, size); return -ENOMEM; } return 0; } static void mthca_unmap_reg(struct mthca_dev *dev, unsigned long offset, unsigned long size, void __iomem *map) { unsigned long base = pci_resource_start(dev->pdev, 0); release_mem_region(base + offset, size); iounmap(map); } static int __devinit mthca_map_eq_regs(struct mthca_dev *dev) { unsigned long mthca_base; mthca_base = pci_resource_start(dev->pdev, 0); if (mthca_is_memfree(dev)) { /* * We assume that the EQ arm and EQ set CI registers * fall within the first BAR. We can't trust the * values firmware gives us, since those addresses are * valid on the HCA's side of the PCI bus but not * necessarily the host side. */ if (mthca_map_reg(dev, (pci_resource_len(dev->pdev, 0) - 1) & dev->fw.arbel.clr_int_base, MTHCA_CLR_INT_SIZE, &dev->clr_base)) { mthca_err(dev, "Couldn't map interrupt clear register, " "aborting.\n"); return -ENOMEM; } /* * Add 4 because we limit ourselves to EQs 0 ... 31, * so we only need the low word of the register. */ if (mthca_map_reg(dev, ((pci_resource_len(dev->pdev, 0) - 1) & dev->fw.arbel.eq_arm_base) + 4, 4, &dev->eq_regs.arbel.eq_arm)) { mthca_err(dev, "Couldn't map EQ arm register, aborting.\n"); mthca_unmap_reg(dev, (pci_resource_len(dev->pdev, 0) - 1) & dev->fw.arbel.clr_int_base, MTHCA_CLR_INT_SIZE, dev->clr_base); return -ENOMEM; } if (mthca_map_reg(dev, (pci_resource_len(dev->pdev, 0) - 1) & dev->fw.arbel.eq_set_ci_base, MTHCA_EQ_SET_CI_SIZE, &dev->eq_regs.arbel.eq_set_ci_base)) { mthca_err(dev, "Couldn't map EQ CI register, aborting.\n"); mthca_unmap_reg(dev, ((pci_resource_len(dev->pdev, 0) - 1) & dev->fw.arbel.eq_arm_base) + 4, 4, dev->eq_regs.arbel.eq_arm); mthca_unmap_reg(dev, (pci_resource_len(dev->pdev, 0) - 1) & dev->fw.arbel.clr_int_base, MTHCA_CLR_INT_SIZE, dev->clr_base); return -ENOMEM; } } else { if (mthca_map_reg(dev, MTHCA_CLR_INT_BASE, MTHCA_CLR_INT_SIZE, &dev->clr_base)) { mthca_err(dev, "Couldn't map interrupt clear register, " "aborting.\n"); return -ENOMEM; } if (mthca_map_reg(dev, MTHCA_ECR_BASE, MTHCA_ECR_SIZE + MTHCA_ECR_CLR_SIZE, &dev->eq_regs.tavor.ecr_base)) { mthca_err(dev, "Couldn't map ecr register, " "aborting.\n"); mthca_unmap_reg(dev, MTHCA_CLR_INT_BASE, MTHCA_CLR_INT_SIZE, dev->clr_base); return -ENOMEM; } } return 0; } static void __devexit mthca_unmap_eq_regs(struct mthca_dev *dev) { if (mthca_is_memfree(dev)) { mthca_unmap_reg(dev, (pci_resource_len(dev->pdev, 0) - 1) & dev->fw.arbel.eq_set_ci_base, MTHCA_EQ_SET_CI_SIZE, dev->eq_regs.arbel.eq_set_ci_base); mthca_unmap_reg(dev, ((pci_resource_len(dev->pdev, 0) - 1) & dev->fw.arbel.eq_arm_base) + 4, 4, dev->eq_regs.arbel.eq_arm); mthca_unmap_reg(dev, (pci_resource_len(dev->pdev, 0) - 1) & dev->fw.arbel.clr_int_base, MTHCA_CLR_INT_SIZE, dev->clr_base); } else { mthca_unmap_reg(dev, MTHCA_ECR_BASE, MTHCA_ECR_SIZE + MTHCA_ECR_CLR_SIZE, dev->eq_regs.tavor.ecr_base); mthca_unmap_reg(dev, MTHCA_CLR_INT_BASE, MTHCA_CLR_INT_SIZE, dev->clr_base); } } int __devinit mthca_map_eq_icm(struct mthca_dev *dev, u64 icm_virt) { int ret; u8 status; /* * We assume that mapping one page is enough for the whole EQ * context table. This is fine with all current HCAs, because * we only use 32 EQs and each EQ uses 32 bytes of context * memory, or 1 KB total. */ dev->eq_table.icm_virt = icm_virt; dev->eq_table.icm_page = alloc_page(GFP_HIGHUSER); if (!dev->eq_table.icm_page) return -ENOMEM; dev->eq_table.icm_dma = pci_map_page(dev->pdev, dev->eq_table.icm_page, 0, PAGE_SIZE, PCI_DMA_BIDIRECTIONAL); if (pci_dma_mapping_error(dev->eq_table.icm_dma)) { __free_page(dev->eq_table.icm_page); return -ENOMEM; } ret = mthca_MAP_ICM_page(dev, dev->eq_table.icm_dma, icm_virt, &status); if (!ret && status) ret = -EINVAL; if (ret) { pci_unmap_page(dev->pdev, dev->eq_table.icm_dma, PAGE_SIZE, PCI_DMA_BIDIRECTIONAL); __free_page(dev->eq_table.icm_page); } return ret; } void __devexit mthca_unmap_eq_icm(struct mthca_dev *dev) { u8 status; mthca_UNMAP_ICM(dev, dev->eq_table.icm_virt, PAGE_SIZE / 4096, &status); pci_unmap_page(dev->pdev, dev->eq_table.icm_dma, PAGE_SIZE, PCI_DMA_BIDIRECTIONAL); __free_page(dev->eq_table.icm_page); } int __devinit mthca_init_eq_table(struct mthca_dev *dev) { int err; u8 status; u8 intr; int i; err = mthca_alloc_init(&dev->eq_table.alloc, dev->limits.num_eqs, dev->limits.num_eqs - 1, dev->limits.reserved_eqs); if (err) return err; err = mthca_map_eq_regs(dev); if (err) goto err_out_free; if (dev->mthca_flags & MTHCA_FLAG_MSI || dev->mthca_flags & MTHCA_FLAG_MSI_X) { dev->eq_table.clr_mask = 0; } else { dev->eq_table.clr_mask = swab32(1 << (dev->eq_table.inta_pin & 31)); dev->eq_table.clr_int = dev->clr_base + (dev->eq_table.inta_pin < 31 ? 4 : 0); } dev->eq_table.arm_mask = 0; intr = (dev->mthca_flags & MTHCA_FLAG_MSI) ? 128 : dev->eq_table.inta_pin; err = mthca_create_eq(dev, dev->limits.num_cqs, (dev->mthca_flags & MTHCA_FLAG_MSI_X) ? 128 : intr, &dev->eq_table.eq[MTHCA_EQ_COMP]); if (err) goto err_out_unmap; err = mthca_create_eq(dev, MTHCA_NUM_ASYNC_EQE, (dev->mthca_flags & MTHCA_FLAG_MSI_X) ? 129 : intr, &dev->eq_table.eq[MTHCA_EQ_ASYNC]); if (err) goto err_out_comp; err = mthca_create_eq(dev, MTHCA_NUM_CMD_EQE, (dev->mthca_flags & MTHCA_FLAG_MSI_X) ? 130 : intr, &dev->eq_table.eq[MTHCA_EQ_CMD]); if (err) goto err_out_async; if (dev->mthca_flags & MTHCA_FLAG_MSI_X) { static const char *eq_name[] = { [MTHCA_EQ_COMP] = DRV_NAME " (comp)", [MTHCA_EQ_ASYNC] = DRV_NAME " (async)", [MTHCA_EQ_CMD] = DRV_NAME " (cmd)" }; for (i = 0; i < MTHCA_NUM_EQ; ++i) { err = request_irq(dev->eq_table.eq[i].msi_x_vector, mthca_is_memfree(dev) ? mthca_arbel_msi_x_interrupt : mthca_tavor_msi_x_interrupt, 0, eq_name[i], dev->eq_table.eq + i); if (err) goto err_out_cmd; dev->eq_table.eq[i].have_irq = 1; } } else { err = request_irq(dev->pdev->irq, mthca_is_memfree(dev) ? mthca_arbel_interrupt : mthca_tavor_interrupt, SA_SHIRQ, DRV_NAME, dev); if (err) goto err_out_cmd; dev->eq_table.have_irq = 1; } err = mthca_MAP_EQ(dev, async_mask(dev), 0, dev->eq_table.eq[MTHCA_EQ_ASYNC].eqn, &status); if (err) mthca_warn(dev, "MAP_EQ for async EQ %d failed (%d)\n", dev->eq_table.eq[MTHCA_EQ_ASYNC].eqn, err); if (status) mthca_warn(dev, "MAP_EQ for async EQ %d returned status 0x%02x\n", dev->eq_table.eq[MTHCA_EQ_ASYNC].eqn, status); err = mthca_MAP_EQ(dev, MTHCA_CMD_EVENT_MASK, 0, dev->eq_table.eq[MTHCA_EQ_CMD].eqn, &status); if (err) mthca_warn(dev, "MAP_EQ for cmd EQ %d failed (%d)\n", dev->eq_table.eq[MTHCA_EQ_CMD].eqn, err); if (status) mthca_warn(dev, "MAP_EQ for cmd EQ %d returned status 0x%02x\n", dev->eq_table.eq[MTHCA_EQ_CMD].eqn, status); for (i = 0; i < MTHCA_EQ_CMD; ++i) if (mthca_is_memfree(dev)) arbel_eq_req_not(dev, dev->eq_table.eq[i].eqn_mask); else tavor_eq_req_not(dev, dev->eq_table.eq[i].eqn); return 0; err_out_cmd: mthca_free_irqs(dev); mthca_free_eq(dev, &dev->eq_table.eq[MTHCA_EQ_CMD]); err_out_async: mthca_free_eq(dev, &dev->eq_table.eq[MTHCA_EQ_ASYNC]); err_out_comp: mthca_free_eq(dev, &dev->eq_table.eq[MTHCA_EQ_COMP]); err_out_unmap: mthca_unmap_eq_regs(dev); err_out_free: mthca_alloc_cleanup(&dev->eq_table.alloc); return err; } void __devexit mthca_cleanup_eq_table(struct mthca_dev *dev) { u8 status; int i; mthca_free_irqs(dev); mthca_MAP_EQ(dev, async_mask(dev), 1, dev->eq_table.eq[MTHCA_EQ_ASYNC].eqn, &status); mthca_MAP_EQ(dev, MTHCA_CMD_EVENT_MASK, 1, dev->eq_table.eq[MTHCA_EQ_CMD].eqn, &status); for (i = 0; i < MTHCA_NUM_EQ; ++i) mthca_free_eq(dev, &dev->eq_table.eq[i]); mthca_unmap_eq_regs(dev); mthca_alloc_cleanup(&dev->eq_table.alloc); }