diff options
Diffstat (limited to 'drivers/infiniband/hw/mthca/mthca_eq.c')
| -rw-r--r-- | drivers/infiniband/hw/mthca/mthca_eq.c | 906 |
1 files changed, 906 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/mthca/mthca_eq.c b/drivers/infiniband/hw/mthca/mthca_eq.c new file mode 100644 index 000000000..97287c544 --- /dev/null +++ b/drivers/infiniband/hw/mthca/mthca_eq.c @@ -0,0 +1,906 @@ +/* + * 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]; +} __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; + } __packed comp; + struct { + u16 reserved1; + __be16 token; + u32 reserved2; + u8 reserved3[3]; + u8 status; + __be64 out_param; + } __packed cmd; + struct { + __be32 qpn; + } __packed qp; + struct { + __be32 srqn; + } __packed srq; + struct { + __be32 cqn; + u32 reserved1; + u8 reserved2[3]; + u8 syndrome; + } __packed cq_err; + struct { + u32 reserved1[2]; + __be32 port; + } __packed port_change; + } event; + u8 reserved3[3]; + u8 owner; +} __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; + + 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_array(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_array(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); + if (err) { + mthca_warn(dev, "SW2HW_EQ returned %d\n", err); + 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; + 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); + if (err) + mthca_warn(dev, "HW2SW_EQ returned %d\n", err); + + 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) + dma_free_coherent(&dev->pdev->dev, 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; + + /* + * 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 = + dma_map_page(&dev->pdev->dev, dev->eq_table.icm_page, 0, + PAGE_SIZE, DMA_BIDIRECTIONAL); + if (dma_mapping_error(&dev->pdev->dev, 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); + if (ret) { + dma_unmap_page(&dev->pdev->dev, dev->eq_table.icm_dma, + PAGE_SIZE, DMA_BIDIRECTIONAL); + __free_page(dev->eq_table.icm_page); + } + + return ret; +} + +void mthca_unmap_eq_icm(struct mthca_dev *dev) +{ + mthca_UNMAP_ICM(dev, dev->eq_table.icm_virt, 1); + dma_unmap_page(&dev->pdev->dev, dev->eq_table.icm_dma, PAGE_SIZE, + DMA_BIDIRECTIONAL); + __free_page(dev->eq_table.icm_page); +} + +int mthca_init_eq_table(struct mthca_dev *dev) +{ + int err; + 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); + if (err) + mthca_warn(dev, "MAP_EQ for async EQ %d failed (%d)\n", + dev->eq_table.eq[MTHCA_EQ_ASYNC].eqn, err); + + err = mthca_MAP_EQ(dev, MTHCA_CMD_EVENT_MASK, + 0, dev->eq_table.eq[MTHCA_EQ_CMD].eqn); + if (err) + mthca_warn(dev, "MAP_EQ for cmd EQ %d failed (%d)\n", + dev->eq_table.eq[MTHCA_EQ_CMD].eqn, err); + + 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) +{ + int i; + + mthca_free_irqs(dev); + + mthca_MAP_EQ(dev, async_mask(dev), + 1, dev->eq_table.eq[MTHCA_EQ_ASYNC].eqn); + mthca_MAP_EQ(dev, MTHCA_CMD_EVENT_MASK, + 1, dev->eq_table.eq[MTHCA_EQ_CMD].eqn); + + 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); +} |