| /* |
| * 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. |
| */ |
| |
| #include <linux/errno.h> |
| #include <linux/interrupt.h> |
| #include <linux/pci.h> |
| #include <linux/slab.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_NUM_SPARE_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_QP_LAST_WQE = 0x13, |
| MTHCA_EVENT_TYPE_SRQ_LIMIT = 0x14, |
| 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_QP_LAST_WQE) | \ |
| (1ULL << MTHCA_EVENT_TYPE_SRQ_LIMIT)) |
| #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 srqn; |
| } __attribute__((packed)) srq; |
| 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) |
| { |
| /* |
| * 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(MTHCA_EQ_DB_SET_CI | eq->eqn, ci & (eq->nent - 1), |
| 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) |
| { |
| mthca_write64(MTHCA_EQ_DB_REQ_NOT | eqn, 0, |
| 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)) { |
| mthca_write64(MTHCA_EQ_DB_DISARM_CQ | eqn, cqn, |
| 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; |
| int set_ci = 0; |
| |
| while ((eqe = next_eqe_sw(eq))) { |
| /* |
| * 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_completion(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_SRQ_QP_LAST_WQE: |
| mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff, |
| IB_EVENT_QP_LAST_WQE_REACHED); |
| break; |
| |
| case MTHCA_EVENT_TYPE_SRQ_LIMIT: |
| mthca_srq_event(dev, be32_to_cpu(eqe->event.srq.srqn) & 0xffffff, |
| IB_EVENT_SRQ_LIMIT_REACHED); |
| 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)); |
| 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); |
| mthca_cq_event(dev, be32_to_cpu(eqe->event.cq_err.cqn), |
| IB_EVENT_CQ_ERR); |
| 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; |
| ++set_ci; |
| |
| /* |
| * The HCA will think the queue has overflowed if we |
| * don't tell it we've been processing events. We |
| * create our EQs with MTHCA_NUM_SPARE_EQE extra |
| * entries, so we must update our consumer index at |
| * least that often. |
| */ |
| if (unlikely(set_ci >= MTHCA_NUM_SPARE_EQE)) { |
| /* |
| * 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 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) |
| return IRQ_NONE; |
| |
| 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) { |
| if (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_HANDLED; |
| } |
| |
| static irqreturn_t mthca_tavor_msi_x_interrupt(int irq, void *eq_ptr) |
| { |
| 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 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 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 mthca_create_eq(struct mthca_dev *dev, |
| int nent, |
| u8 intr, |
| struct mthca_eq *eq) |
| { |
| int npages; |
| 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; |
| |
| eq->dev = dev; |
| eq->nent = roundup_pow_of_two(max(nent, 2)); |
| npages = ALIGN(eq->nent * MTHCA_EQ_ENTRY_SIZE, PAGE_SIZE) / PAGE_SIZE; |
| |
| 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; |
| dma_unmap_addr_set(&eq->page_list[i], mapping, t); |
| |
| clear_page(eq->page_list[i].buf); |
| } |
| |
| for (i = 0; i < eq->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; |
| |
| 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(eq->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, eq->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, |
| dma_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, |
| dma_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); |
| dev->eq_table.eq[i].have_irq = 0; |
| } |
| } |
| |
| static int mthca_map_reg(struct mthca_dev *dev, |
| unsigned long offset, unsigned long size, |
| void __iomem **map) |
| { |
| phys_addr_t base = pci_resource_start(dev->pdev, 0); |
| |
| *map = ioremap(base + offset, size); |
| if (!*map) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static int mthca_map_eq_regs(struct mthca_dev *dev) |
| { |
| 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"); |
| iounmap(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"); |
| iounmap(dev->eq_regs.arbel.eq_arm); |
| iounmap(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"); |
| iounmap(dev->clr_base); |
| return -ENOMEM; |
| } |
| } |
| |
| return 0; |
| |
| } |
| |
| static void mthca_unmap_eq_regs(struct mthca_dev *dev) |
| { |
| if (mthca_is_memfree(dev)) { |
| iounmap(dev->eq_regs.arbel.eq_set_ci_base); |
| iounmap(dev->eq_regs.arbel.eq_arm); |
| iounmap(dev->clr_base); |
| } else { |
| iounmap(dev->eq_regs.tavor.ecr_base); |
| iounmap(dev->clr_base); |
| } |
| } |
| |
| int 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->pdev, 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 mthca_unmap_eq_icm(struct mthca_dev *dev) |
| { |
| u8 status; |
| |
| mthca_UNMAP_ICM(dev, dev->eq_table.icm_virt, 1, &status); |
| pci_unmap_page(dev->pdev, dev->eq_table.icm_dma, PAGE_SIZE, |
| PCI_DMA_BIDIRECTIONAL); |
| __free_page(dev->eq_table.icm_page); |
| } |
| |
| int 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_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 < 32 ? 4 : 0); |
| } |
| |
| dev->eq_table.arm_mask = 0; |
| |
| intr = dev->eq_table.inta_pin; |
| |
| err = mthca_create_eq(dev, dev->limits.num_cqs + MTHCA_NUM_SPARE_EQE, |
| (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 + MTHCA_NUM_SPARE_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 + MTHCA_NUM_SPARE_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) { |
| snprintf(dev->eq_table.eq[i].irq_name, |
| IB_DEVICE_NAME_MAX, |
| "%s@pci:%s", eq_name[i], |
| pci_name(dev->pdev)); |
| 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, dev->eq_table.eq[i].irq_name, |
| dev->eq_table.eq + i); |
| if (err) |
| goto err_out_cmd; |
| dev->eq_table.eq[i].have_irq = 1; |
| } |
| } else { |
| snprintf(dev->eq_table.eq[0].irq_name, IB_DEVICE_NAME_MAX, |
| DRV_NAME "@pci:%s", pci_name(dev->pdev)); |
| err = request_irq(dev->pdev->irq, |
| mthca_is_memfree(dev) ? |
| mthca_arbel_interrupt : |
| mthca_tavor_interrupt, |
| IRQF_SHARED, dev->eq_table.eq[0].irq_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_NUM_EQ; ++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 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); |
| } |