diff options
Diffstat (limited to 'drivers/infiniband/hw/vmw_pvrdma/pvrdma_main.c')
| -rw-r--r-- | drivers/infiniband/hw/vmw_pvrdma/pvrdma_main.c | 1186 |
1 files changed, 1186 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/vmw_pvrdma/pvrdma_main.c b/drivers/infiniband/hw/vmw_pvrdma/pvrdma_main.c new file mode 100644 index 000000000..6895bac53 --- /dev/null +++ b/drivers/infiniband/hw/vmw_pvrdma/pvrdma_main.c @@ -0,0 +1,1186 @@ +/* + * Copyright (c) 2012-2016 VMware, Inc. All rights reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of EITHER the GNU General Public License + * version 2 as published by the Free Software Foundation or the BSD + * 2-Clause License. This program is distributed in the hope that it + * will be useful, but WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED + * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. + * See the GNU General Public License version 2 for more details at + * http://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html. + * + * You should have received a copy of the GNU General Public License + * along with this program available in the file COPYING in the main + * directory of this source tree. + * + * The BSD 2-Clause License + * + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <linux/errno.h> +#include <linux/inetdevice.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <rdma/ib_addr.h> +#include <rdma/ib_smi.h> +#include <rdma/ib_user_verbs.h> +#include <net/addrconf.h> + +#include "pvrdma.h" + +#define DRV_NAME "vmw_pvrdma" +#define DRV_VERSION "1.0.1.0-k" + +static DEFINE_MUTEX(pvrdma_device_list_lock); +static LIST_HEAD(pvrdma_device_list); +static struct workqueue_struct *event_wq; + +static int pvrdma_add_gid(const struct ib_gid_attr *attr, void **context); +static int pvrdma_del_gid(const struct ib_gid_attr *attr, void **context); + +static ssize_t hca_type_show(struct device *device, + struct device_attribute *attr, char *buf) +{ + return sprintf(buf, "VMW_PVRDMA-%s\n", DRV_VERSION); +} +static DEVICE_ATTR_RO(hca_type); + +static ssize_t hw_rev_show(struct device *device, + struct device_attribute *attr, char *buf) +{ + return sprintf(buf, "%d\n", PVRDMA_REV_ID); +} +static DEVICE_ATTR_RO(hw_rev); + +static ssize_t board_id_show(struct device *device, + struct device_attribute *attr, char *buf) +{ + return sprintf(buf, "%d\n", PVRDMA_BOARD_ID); +} +static DEVICE_ATTR_RO(board_id); + +static struct attribute *pvrdma_class_attributes[] = { + &dev_attr_hw_rev.attr, + &dev_attr_hca_type.attr, + &dev_attr_board_id.attr, + NULL, +}; + +static const struct attribute_group pvrdma_attr_group = { + .attrs = pvrdma_class_attributes, +}; + +static void pvrdma_get_fw_ver_str(struct ib_device *device, char *str) +{ + struct pvrdma_dev *dev = + container_of(device, struct pvrdma_dev, ib_dev); + snprintf(str, IB_FW_VERSION_NAME_MAX, "%d.%d.%d\n", + (int) (dev->dsr->caps.fw_ver >> 32), + (int) (dev->dsr->caps.fw_ver >> 16) & 0xffff, + (int) dev->dsr->caps.fw_ver & 0xffff); +} + +static int pvrdma_init_device(struct pvrdma_dev *dev) +{ + /* Initialize some device related stuff */ + spin_lock_init(&dev->cmd_lock); + sema_init(&dev->cmd_sema, 1); + atomic_set(&dev->num_qps, 0); + atomic_set(&dev->num_srqs, 0); + atomic_set(&dev->num_cqs, 0); + atomic_set(&dev->num_pds, 0); + atomic_set(&dev->num_ahs, 0); + + return 0; +} + +static int pvrdma_port_immutable(struct ib_device *ibdev, u8 port_num, + struct ib_port_immutable *immutable) +{ + struct pvrdma_dev *dev = to_vdev(ibdev); + struct ib_port_attr attr; + int err; + + if (dev->dsr->caps.gid_types == PVRDMA_GID_TYPE_FLAG_ROCE_V1) + immutable->core_cap_flags |= RDMA_CORE_PORT_IBA_ROCE; + else if (dev->dsr->caps.gid_types == PVRDMA_GID_TYPE_FLAG_ROCE_V2) + immutable->core_cap_flags |= RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP; + + err = ib_query_port(ibdev, port_num, &attr); + if (err) + return err; + + immutable->pkey_tbl_len = attr.pkey_tbl_len; + immutable->gid_tbl_len = attr.gid_tbl_len; + immutable->max_mad_size = IB_MGMT_MAD_SIZE; + return 0; +} + +static const struct ib_device_ops pvrdma_dev_ops = { + .owner = THIS_MODULE, + .driver_id = RDMA_DRIVER_VMW_PVRDMA, + .uverbs_abi_ver = PVRDMA_UVERBS_ABI_VERSION, + + .add_gid = pvrdma_add_gid, + .alloc_mr = pvrdma_alloc_mr, + .alloc_pd = pvrdma_alloc_pd, + .alloc_ucontext = pvrdma_alloc_ucontext, + .create_ah = pvrdma_create_ah, + .create_cq = pvrdma_create_cq, + .create_qp = pvrdma_create_qp, + .dealloc_pd = pvrdma_dealloc_pd, + .dealloc_ucontext = pvrdma_dealloc_ucontext, + .del_gid = pvrdma_del_gid, + .dereg_mr = pvrdma_dereg_mr, + .destroy_ah = pvrdma_destroy_ah, + .destroy_cq = pvrdma_destroy_cq, + .destroy_qp = pvrdma_destroy_qp, + .get_dev_fw_str = pvrdma_get_fw_ver_str, + .get_dma_mr = pvrdma_get_dma_mr, + .get_link_layer = pvrdma_port_link_layer, + .get_port_immutable = pvrdma_port_immutable, + .map_mr_sg = pvrdma_map_mr_sg, + .mmap = pvrdma_mmap, + .modify_port = pvrdma_modify_port, + .modify_qp = pvrdma_modify_qp, + .poll_cq = pvrdma_poll_cq, + .post_recv = pvrdma_post_recv, + .post_send = pvrdma_post_send, + .query_device = pvrdma_query_device, + .query_gid = pvrdma_query_gid, + .query_pkey = pvrdma_query_pkey, + .query_port = pvrdma_query_port, + .query_qp = pvrdma_query_qp, + .reg_user_mr = pvrdma_reg_user_mr, + .req_notify_cq = pvrdma_req_notify_cq, + + INIT_RDMA_OBJ_SIZE(ib_ah, pvrdma_ah, ibah), + INIT_RDMA_OBJ_SIZE(ib_cq, pvrdma_cq, ibcq), + INIT_RDMA_OBJ_SIZE(ib_pd, pvrdma_pd, ibpd), + INIT_RDMA_OBJ_SIZE(ib_ucontext, pvrdma_ucontext, ibucontext), +}; + +static const struct ib_device_ops pvrdma_dev_srq_ops = { + .create_srq = pvrdma_create_srq, + .destroy_srq = pvrdma_destroy_srq, + .modify_srq = pvrdma_modify_srq, + .query_srq = pvrdma_query_srq, + + INIT_RDMA_OBJ_SIZE(ib_srq, pvrdma_srq, ibsrq), +}; + +static int pvrdma_register_device(struct pvrdma_dev *dev) +{ + int ret = -1; + + dev->ib_dev.node_guid = dev->dsr->caps.node_guid; + dev->sys_image_guid = dev->dsr->caps.sys_image_guid; + dev->flags = 0; + dev->ib_dev.num_comp_vectors = 1; + dev->ib_dev.dev.parent = &dev->pdev->dev; + dev->ib_dev.uverbs_cmd_mask = + (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) | + (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) | + (1ull << IB_USER_VERBS_CMD_QUERY_PORT) | + (1ull << IB_USER_VERBS_CMD_ALLOC_PD) | + (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) | + (1ull << IB_USER_VERBS_CMD_REG_MR) | + (1ull << IB_USER_VERBS_CMD_DEREG_MR) | + (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) | + (1ull << IB_USER_VERBS_CMD_CREATE_CQ) | + (1ull << IB_USER_VERBS_CMD_POLL_CQ) | + (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) | + (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) | + (1ull << IB_USER_VERBS_CMD_CREATE_QP) | + (1ull << IB_USER_VERBS_CMD_MODIFY_QP) | + (1ull << IB_USER_VERBS_CMD_QUERY_QP) | + (1ull << IB_USER_VERBS_CMD_DESTROY_QP) | + (1ull << IB_USER_VERBS_CMD_POST_SEND) | + (1ull << IB_USER_VERBS_CMD_POST_RECV) | + (1ull << IB_USER_VERBS_CMD_CREATE_AH) | + (1ull << IB_USER_VERBS_CMD_DESTROY_AH); + + dev->ib_dev.node_type = RDMA_NODE_IB_CA; + dev->ib_dev.phys_port_cnt = dev->dsr->caps.phys_port_cnt; + + ib_set_device_ops(&dev->ib_dev, &pvrdma_dev_ops); + + mutex_init(&dev->port_mutex); + spin_lock_init(&dev->desc_lock); + + dev->cq_tbl = kcalloc(dev->dsr->caps.max_cq, sizeof(struct pvrdma_cq *), + GFP_KERNEL); + if (!dev->cq_tbl) + return ret; + spin_lock_init(&dev->cq_tbl_lock); + + dev->qp_tbl = kcalloc(dev->dsr->caps.max_qp, sizeof(struct pvrdma_qp *), + GFP_KERNEL); + if (!dev->qp_tbl) + goto err_cq_free; + spin_lock_init(&dev->qp_tbl_lock); + + /* Check if SRQ is supported by backend */ + if (dev->dsr->caps.max_srq) { + dev->ib_dev.uverbs_cmd_mask |= + (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) | + (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) | + (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) | + (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ) | + (1ull << IB_USER_VERBS_CMD_POST_SRQ_RECV); + + ib_set_device_ops(&dev->ib_dev, &pvrdma_dev_srq_ops); + + dev->srq_tbl = kcalloc(dev->dsr->caps.max_srq, + sizeof(struct pvrdma_srq *), + GFP_KERNEL); + if (!dev->srq_tbl) + goto err_qp_free; + } + ret = ib_device_set_netdev(&dev->ib_dev, dev->netdev, 1); + if (ret) + goto err_srq_free; + spin_lock_init(&dev->srq_tbl_lock); + rdma_set_device_sysfs_group(&dev->ib_dev, &pvrdma_attr_group); + + ret = ib_register_device(&dev->ib_dev, "vmw_pvrdma%d", &dev->pdev->dev); + if (ret) + goto err_srq_free; + + dev->ib_active = true; + + return 0; + +err_srq_free: + kfree(dev->srq_tbl); +err_qp_free: + kfree(dev->qp_tbl); +err_cq_free: + kfree(dev->cq_tbl); + + return ret; +} + +static irqreturn_t pvrdma_intr0_handler(int irq, void *dev_id) +{ + u32 icr = PVRDMA_INTR_CAUSE_RESPONSE; + struct pvrdma_dev *dev = dev_id; + + dev_dbg(&dev->pdev->dev, "interrupt 0 (response) handler\n"); + + if (!dev->pdev->msix_enabled) { + /* Legacy intr */ + icr = pvrdma_read_reg(dev, PVRDMA_REG_ICR); + if (icr == 0) + return IRQ_NONE; + } + + if (icr == PVRDMA_INTR_CAUSE_RESPONSE) + complete(&dev->cmd_done); + + return IRQ_HANDLED; +} + +static void pvrdma_qp_event(struct pvrdma_dev *dev, u32 qpn, int type) +{ + struct pvrdma_qp *qp; + unsigned long flags; + + spin_lock_irqsave(&dev->qp_tbl_lock, flags); + qp = dev->qp_tbl[qpn % dev->dsr->caps.max_qp]; + if (qp) + refcount_inc(&qp->refcnt); + spin_unlock_irqrestore(&dev->qp_tbl_lock, flags); + + if (qp && qp->ibqp.event_handler) { + struct ib_qp *ibqp = &qp->ibqp; + struct ib_event e; + + e.device = ibqp->device; + e.element.qp = ibqp; + e.event = type; /* 1:1 mapping for now. */ + ibqp->event_handler(&e, ibqp->qp_context); + } + if (qp) { + if (refcount_dec_and_test(&qp->refcnt)) + complete(&qp->free); + } +} + +static void pvrdma_cq_event(struct pvrdma_dev *dev, u32 cqn, int type) +{ + struct pvrdma_cq *cq; + unsigned long flags; + + spin_lock_irqsave(&dev->cq_tbl_lock, flags); + cq = dev->cq_tbl[cqn % dev->dsr->caps.max_cq]; + if (cq) + refcount_inc(&cq->refcnt); + spin_unlock_irqrestore(&dev->cq_tbl_lock, flags); + + if (cq && cq->ibcq.event_handler) { + struct ib_cq *ibcq = &cq->ibcq; + struct ib_event e; + + e.device = ibcq->device; + e.element.cq = ibcq; + e.event = type; /* 1:1 mapping for now. */ + ibcq->event_handler(&e, ibcq->cq_context); + } + if (cq) { + if (refcount_dec_and_test(&cq->refcnt)) + complete(&cq->free); + } +} + +static void pvrdma_srq_event(struct pvrdma_dev *dev, u32 srqn, int type) +{ + struct pvrdma_srq *srq; + unsigned long flags; + + spin_lock_irqsave(&dev->srq_tbl_lock, flags); + if (dev->srq_tbl) + srq = dev->srq_tbl[srqn % dev->dsr->caps.max_srq]; + else + srq = NULL; + if (srq) + refcount_inc(&srq->refcnt); + spin_unlock_irqrestore(&dev->srq_tbl_lock, flags); + + if (srq && srq->ibsrq.event_handler) { + struct ib_srq *ibsrq = &srq->ibsrq; + struct ib_event e; + + e.device = ibsrq->device; + e.element.srq = ibsrq; + e.event = type; /* 1:1 mapping for now. */ + ibsrq->event_handler(&e, ibsrq->srq_context); + } + if (srq) { + if (refcount_dec_and_test(&srq->refcnt)) + complete(&srq->free); + } +} + +static void pvrdma_dispatch_event(struct pvrdma_dev *dev, int port, + enum ib_event_type event) +{ + struct ib_event ib_event; + + memset(&ib_event, 0, sizeof(ib_event)); + ib_event.device = &dev->ib_dev; + ib_event.element.port_num = port; + ib_event.event = event; + ib_dispatch_event(&ib_event); +} + +static void pvrdma_dev_event(struct pvrdma_dev *dev, u8 port, int type) +{ + if (port < 1 || port > dev->dsr->caps.phys_port_cnt) { + dev_warn(&dev->pdev->dev, "event on port %d\n", port); + return; + } + + pvrdma_dispatch_event(dev, port, type); +} + +static inline struct pvrdma_eqe *get_eqe(struct pvrdma_dev *dev, unsigned int i) +{ + return (struct pvrdma_eqe *)pvrdma_page_dir_get_ptr( + &dev->async_pdir, + PAGE_SIZE + + sizeof(struct pvrdma_eqe) * i); +} + +static irqreturn_t pvrdma_intr1_handler(int irq, void *dev_id) +{ + struct pvrdma_dev *dev = dev_id; + struct pvrdma_ring *ring = &dev->async_ring_state->rx; + int ring_slots = (dev->dsr->async_ring_pages.num_pages - 1) * + PAGE_SIZE / sizeof(struct pvrdma_eqe); + unsigned int head; + + dev_dbg(&dev->pdev->dev, "interrupt 1 (async event) handler\n"); + + /* + * Don't process events until the IB device is registered. Otherwise + * we'll try to ib_dispatch_event() on an invalid device. + */ + if (!dev->ib_active) + return IRQ_HANDLED; + + while (pvrdma_idx_ring_has_data(ring, ring_slots, &head) > 0) { + struct pvrdma_eqe *eqe; + + eqe = get_eqe(dev, head); + + switch (eqe->type) { + case PVRDMA_EVENT_QP_FATAL: + case PVRDMA_EVENT_QP_REQ_ERR: + case PVRDMA_EVENT_QP_ACCESS_ERR: + case PVRDMA_EVENT_COMM_EST: + case PVRDMA_EVENT_SQ_DRAINED: + case PVRDMA_EVENT_PATH_MIG: + case PVRDMA_EVENT_PATH_MIG_ERR: + case PVRDMA_EVENT_QP_LAST_WQE_REACHED: + pvrdma_qp_event(dev, eqe->info, eqe->type); + break; + + case PVRDMA_EVENT_CQ_ERR: + pvrdma_cq_event(dev, eqe->info, eqe->type); + break; + + case PVRDMA_EVENT_SRQ_ERR: + case PVRDMA_EVENT_SRQ_LIMIT_REACHED: + pvrdma_srq_event(dev, eqe->info, eqe->type); + break; + + case PVRDMA_EVENT_PORT_ACTIVE: + case PVRDMA_EVENT_PORT_ERR: + case PVRDMA_EVENT_LID_CHANGE: + case PVRDMA_EVENT_PKEY_CHANGE: + case PVRDMA_EVENT_SM_CHANGE: + case PVRDMA_EVENT_CLIENT_REREGISTER: + case PVRDMA_EVENT_GID_CHANGE: + pvrdma_dev_event(dev, eqe->info, eqe->type); + break; + + case PVRDMA_EVENT_DEVICE_FATAL: + pvrdma_dev_event(dev, 1, eqe->type); + break; + + default: + break; + } + + pvrdma_idx_ring_inc(&ring->cons_head, ring_slots); + } + + return IRQ_HANDLED; +} + +static inline struct pvrdma_cqne *get_cqne(struct pvrdma_dev *dev, + unsigned int i) +{ + return (struct pvrdma_cqne *)pvrdma_page_dir_get_ptr( + &dev->cq_pdir, + PAGE_SIZE + + sizeof(struct pvrdma_cqne) * i); +} + +static irqreturn_t pvrdma_intrx_handler(int irq, void *dev_id) +{ + struct pvrdma_dev *dev = dev_id; + struct pvrdma_ring *ring = &dev->cq_ring_state->rx; + int ring_slots = (dev->dsr->cq_ring_pages.num_pages - 1) * PAGE_SIZE / + sizeof(struct pvrdma_cqne); + unsigned int head; + unsigned long flags; + + dev_dbg(&dev->pdev->dev, "interrupt x (completion) handler\n"); + + while (pvrdma_idx_ring_has_data(ring, ring_slots, &head) > 0) { + struct pvrdma_cqne *cqne; + struct pvrdma_cq *cq; + + cqne = get_cqne(dev, head); + spin_lock_irqsave(&dev->cq_tbl_lock, flags); + cq = dev->cq_tbl[cqne->info % dev->dsr->caps.max_cq]; + if (cq) + refcount_inc(&cq->refcnt); + spin_unlock_irqrestore(&dev->cq_tbl_lock, flags); + + if (cq && cq->ibcq.comp_handler) + cq->ibcq.comp_handler(&cq->ibcq, cq->ibcq.cq_context); + if (cq) { + if (refcount_dec_and_test(&cq->refcnt)) + complete(&cq->free); + } + pvrdma_idx_ring_inc(&ring->cons_head, ring_slots); + } + + return IRQ_HANDLED; +} + +static void pvrdma_free_irq(struct pvrdma_dev *dev) +{ + int i; + + dev_dbg(&dev->pdev->dev, "freeing interrupts\n"); + for (i = 0; i < dev->nr_vectors; i++) + free_irq(pci_irq_vector(dev->pdev, i), dev); +} + +static void pvrdma_enable_intrs(struct pvrdma_dev *dev) +{ + dev_dbg(&dev->pdev->dev, "enable interrupts\n"); + pvrdma_write_reg(dev, PVRDMA_REG_IMR, 0); +} + +static void pvrdma_disable_intrs(struct pvrdma_dev *dev) +{ + dev_dbg(&dev->pdev->dev, "disable interrupts\n"); + pvrdma_write_reg(dev, PVRDMA_REG_IMR, ~0); +} + +static int pvrdma_alloc_intrs(struct pvrdma_dev *dev) +{ + struct pci_dev *pdev = dev->pdev; + int ret = 0, i; + + ret = pci_alloc_irq_vectors(pdev, 1, PVRDMA_MAX_INTERRUPTS, + PCI_IRQ_MSIX); + if (ret < 0) { + ret = pci_alloc_irq_vectors(pdev, 1, 1, + PCI_IRQ_MSI | PCI_IRQ_LEGACY); + if (ret < 0) + return ret; + } + dev->nr_vectors = ret; + + ret = request_irq(pci_irq_vector(dev->pdev, 0), pvrdma_intr0_handler, + pdev->msix_enabled ? 0 : IRQF_SHARED, DRV_NAME, dev); + if (ret) { + dev_err(&dev->pdev->dev, + "failed to request interrupt 0\n"); + goto out_free_vectors; + } + + for (i = 1; i < dev->nr_vectors; i++) { + ret = request_irq(pci_irq_vector(dev->pdev, i), + i == 1 ? pvrdma_intr1_handler : + pvrdma_intrx_handler, + 0, DRV_NAME, dev); + if (ret) { + dev_err(&dev->pdev->dev, + "failed to request interrupt %d\n", i); + goto free_irqs; + } + } + + return 0; + +free_irqs: + while (--i >= 0) + free_irq(pci_irq_vector(dev->pdev, i), dev); +out_free_vectors: + pci_free_irq_vectors(pdev); + return ret; +} + +static void pvrdma_free_slots(struct pvrdma_dev *dev) +{ + struct pci_dev *pdev = dev->pdev; + + if (dev->resp_slot) + dma_free_coherent(&pdev->dev, PAGE_SIZE, dev->resp_slot, + dev->dsr->resp_slot_dma); + if (dev->cmd_slot) + dma_free_coherent(&pdev->dev, PAGE_SIZE, dev->cmd_slot, + dev->dsr->cmd_slot_dma); +} + +static int pvrdma_add_gid_at_index(struct pvrdma_dev *dev, + const union ib_gid *gid, + u8 gid_type, + int index) +{ + int ret; + union pvrdma_cmd_req req; + struct pvrdma_cmd_create_bind *cmd_bind = &req.create_bind; + + if (!dev->sgid_tbl) { + dev_warn(&dev->pdev->dev, "sgid table not initialized\n"); + return -EINVAL; + } + + memset(cmd_bind, 0, sizeof(*cmd_bind)); + cmd_bind->hdr.cmd = PVRDMA_CMD_CREATE_BIND; + memcpy(cmd_bind->new_gid, gid->raw, 16); + cmd_bind->mtu = ib_mtu_enum_to_int(IB_MTU_1024); + cmd_bind->vlan = 0xfff; + cmd_bind->index = index; + cmd_bind->gid_type = gid_type; + + ret = pvrdma_cmd_post(dev, &req, NULL, 0); + if (ret < 0) { + dev_warn(&dev->pdev->dev, + "could not create binding, error: %d\n", ret); + return -EFAULT; + } + memcpy(&dev->sgid_tbl[index], gid, sizeof(*gid)); + return 0; +} + +static int pvrdma_add_gid(const struct ib_gid_attr *attr, void **context) +{ + struct pvrdma_dev *dev = to_vdev(attr->device); + + return pvrdma_add_gid_at_index(dev, &attr->gid, + ib_gid_type_to_pvrdma(attr->gid_type), + attr->index); +} + +static int pvrdma_del_gid_at_index(struct pvrdma_dev *dev, int index) +{ + int ret; + union pvrdma_cmd_req req; + struct pvrdma_cmd_destroy_bind *cmd_dest = &req.destroy_bind; + + /* Update sgid table. */ + if (!dev->sgid_tbl) { + dev_warn(&dev->pdev->dev, "sgid table not initialized\n"); + return -EINVAL; + } + + memset(cmd_dest, 0, sizeof(*cmd_dest)); + cmd_dest->hdr.cmd = PVRDMA_CMD_DESTROY_BIND; + memcpy(cmd_dest->dest_gid, &dev->sgid_tbl[index], 16); + cmd_dest->index = index; + + ret = pvrdma_cmd_post(dev, &req, NULL, 0); + if (ret < 0) { + dev_warn(&dev->pdev->dev, + "could not destroy binding, error: %d\n", ret); + return ret; + } + memset(&dev->sgid_tbl[index], 0, 16); + return 0; +} + +static int pvrdma_del_gid(const struct ib_gid_attr *attr, void **context) +{ + struct pvrdma_dev *dev = to_vdev(attr->device); + + dev_dbg(&dev->pdev->dev, "removing gid at index %u from %s", + attr->index, dev->netdev->name); + + return pvrdma_del_gid_at_index(dev, attr->index); +} + +static void pvrdma_netdevice_event_handle(struct pvrdma_dev *dev, + struct net_device *ndev, + unsigned long event) +{ + struct pci_dev *pdev_net; + unsigned int slot; + + switch (event) { + case NETDEV_REBOOT: + case NETDEV_DOWN: + pvrdma_dispatch_event(dev, 1, IB_EVENT_PORT_ERR); + break; + case NETDEV_UP: + pvrdma_write_reg(dev, PVRDMA_REG_CTL, + PVRDMA_DEVICE_CTL_UNQUIESCE); + + mb(); + + if (pvrdma_read_reg(dev, PVRDMA_REG_ERR)) + dev_err(&dev->pdev->dev, + "failed to activate device during link up\n"); + else + pvrdma_dispatch_event(dev, 1, IB_EVENT_PORT_ACTIVE); + break; + case NETDEV_UNREGISTER: + ib_device_set_netdev(&dev->ib_dev, NULL, 1); + dev_put(dev->netdev); + dev->netdev = NULL; + break; + case NETDEV_REGISTER: + /* vmxnet3 will have same bus, slot. But func will be 0 */ + slot = PCI_SLOT(dev->pdev->devfn); + pdev_net = pci_get_slot(dev->pdev->bus, + PCI_DEVFN(slot, 0)); + if ((dev->netdev == NULL) && + (pci_get_drvdata(pdev_net) == ndev)) { + /* this is our netdev */ + ib_device_set_netdev(&dev->ib_dev, ndev, 1); + dev->netdev = ndev; + dev_hold(ndev); + } + pci_dev_put(pdev_net); + break; + + default: + dev_dbg(&dev->pdev->dev, "ignore netdevice event %ld on %s\n", + event, dev_name(&dev->ib_dev.dev)); + break; + } +} + +static void pvrdma_netdevice_event_work(struct work_struct *work) +{ + struct pvrdma_netdevice_work *netdev_work; + struct pvrdma_dev *dev; + + netdev_work = container_of(work, struct pvrdma_netdevice_work, work); + + mutex_lock(&pvrdma_device_list_lock); + list_for_each_entry(dev, &pvrdma_device_list, device_link) { + if ((netdev_work->event == NETDEV_REGISTER) || + (dev->netdev == netdev_work->event_netdev)) { + pvrdma_netdevice_event_handle(dev, + netdev_work->event_netdev, + netdev_work->event); + break; + } + } + mutex_unlock(&pvrdma_device_list_lock); + + kfree(netdev_work); +} + +static int pvrdma_netdevice_event(struct notifier_block *this, + unsigned long event, void *ptr) +{ + struct net_device *event_netdev = netdev_notifier_info_to_dev(ptr); + struct pvrdma_netdevice_work *netdev_work; + + netdev_work = kmalloc(sizeof(*netdev_work), GFP_ATOMIC); + if (!netdev_work) + return NOTIFY_BAD; + + INIT_WORK(&netdev_work->work, pvrdma_netdevice_event_work); + netdev_work->event_netdev = event_netdev; + netdev_work->event = event; + queue_work(event_wq, &netdev_work->work); + + return NOTIFY_DONE; +} + +static int pvrdma_pci_probe(struct pci_dev *pdev, + const struct pci_device_id *id) +{ + struct pci_dev *pdev_net; + struct pvrdma_dev *dev; + int ret; + unsigned long start; + unsigned long len; + dma_addr_t slot_dma = 0; + + dev_dbg(&pdev->dev, "initializing driver %s\n", pci_name(pdev)); + + /* Allocate zero-out device */ + dev = ib_alloc_device(pvrdma_dev, ib_dev); + if (!dev) { + dev_err(&pdev->dev, "failed to allocate IB device\n"); + return -ENOMEM; + } + + mutex_lock(&pvrdma_device_list_lock); + list_add(&dev->device_link, &pvrdma_device_list); + mutex_unlock(&pvrdma_device_list_lock); + + ret = pvrdma_init_device(dev); + if (ret) + goto err_free_device; + + dev->pdev = pdev; + pci_set_drvdata(pdev, dev); + + ret = pci_enable_device(pdev); + if (ret) { + dev_err(&pdev->dev, "cannot enable PCI device\n"); + goto err_free_device; + } + + dev_dbg(&pdev->dev, "PCI resource flags BAR0 %#lx\n", + pci_resource_flags(pdev, 0)); + dev_dbg(&pdev->dev, "PCI resource len %#llx\n", + (unsigned long long)pci_resource_len(pdev, 0)); + dev_dbg(&pdev->dev, "PCI resource start %#llx\n", + (unsigned long long)pci_resource_start(pdev, 0)); + dev_dbg(&pdev->dev, "PCI resource flags BAR1 %#lx\n", + pci_resource_flags(pdev, 1)); + dev_dbg(&pdev->dev, "PCI resource len %#llx\n", + (unsigned long long)pci_resource_len(pdev, 1)); + dev_dbg(&pdev->dev, "PCI resource start %#llx\n", + (unsigned long long)pci_resource_start(pdev, 1)); + + if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM) || + !(pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) { + dev_err(&pdev->dev, "PCI BAR region not MMIO\n"); + ret = -ENOMEM; + goto err_disable_pdev; + } + + ret = pci_request_regions(pdev, DRV_NAME); + if (ret) { + dev_err(&pdev->dev, "cannot request PCI resources\n"); + goto err_disable_pdev; + } + + /* Enable 64-Bit DMA */ + if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) == 0) { + ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); + if (ret != 0) { + dev_err(&pdev->dev, + "pci_set_consistent_dma_mask failed\n"); + goto err_free_resource; + } + } else { + ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); + if (ret != 0) { + dev_err(&pdev->dev, + "pci_set_dma_mask failed\n"); + goto err_free_resource; + } + } + dma_set_max_seg_size(&pdev->dev, UINT_MAX); + pci_set_master(pdev); + + /* Map register space */ + start = pci_resource_start(dev->pdev, PVRDMA_PCI_RESOURCE_REG); + len = pci_resource_len(dev->pdev, PVRDMA_PCI_RESOURCE_REG); + dev->regs = ioremap(start, len); + if (!dev->regs) { + dev_err(&pdev->dev, "register mapping failed\n"); + ret = -ENOMEM; + goto err_free_resource; + } + + /* Setup per-device UAR. */ + dev->driver_uar.index = 0; + dev->driver_uar.pfn = + pci_resource_start(dev->pdev, PVRDMA_PCI_RESOURCE_UAR) >> + PAGE_SHIFT; + dev->driver_uar.map = + ioremap(dev->driver_uar.pfn << PAGE_SHIFT, PAGE_SIZE); + if (!dev->driver_uar.map) { + dev_err(&pdev->dev, "failed to remap UAR pages\n"); + ret = -ENOMEM; + goto err_unmap_regs; + } + + dev->dsr_version = pvrdma_read_reg(dev, PVRDMA_REG_VERSION); + dev_info(&pdev->dev, "device version %d, driver version %d\n", + dev->dsr_version, PVRDMA_VERSION); + + dev->dsr = dma_alloc_coherent(&pdev->dev, sizeof(*dev->dsr), + &dev->dsrbase, GFP_KERNEL); + if (!dev->dsr) { + dev_err(&pdev->dev, "failed to allocate shared region\n"); + ret = -ENOMEM; + goto err_uar_unmap; + } + + /* Setup the shared region */ + dev->dsr->driver_version = PVRDMA_VERSION; + dev->dsr->gos_info.gos_bits = sizeof(void *) == 4 ? + PVRDMA_GOS_BITS_32 : + PVRDMA_GOS_BITS_64; + dev->dsr->gos_info.gos_type = PVRDMA_GOS_TYPE_LINUX; + dev->dsr->gos_info.gos_ver = 1; + + if (dev->dsr_version < PVRDMA_PPN64_VERSION) + dev->dsr->uar_pfn = dev->driver_uar.pfn; + else + dev->dsr->uar_pfn64 = dev->driver_uar.pfn; + + /* Command slot. */ + dev->cmd_slot = dma_alloc_coherent(&pdev->dev, PAGE_SIZE, + &slot_dma, GFP_KERNEL); + if (!dev->cmd_slot) { + ret = -ENOMEM; + goto err_free_dsr; + } + + dev->dsr->cmd_slot_dma = (u64)slot_dma; + + /* Response slot. */ + dev->resp_slot = dma_alloc_coherent(&pdev->dev, PAGE_SIZE, + &slot_dma, GFP_KERNEL); + if (!dev->resp_slot) { + ret = -ENOMEM; + goto err_free_slots; + } + + dev->dsr->resp_slot_dma = (u64)slot_dma; + + /* Async event ring */ + dev->dsr->async_ring_pages.num_pages = PVRDMA_NUM_RING_PAGES; + ret = pvrdma_page_dir_init(dev, &dev->async_pdir, + dev->dsr->async_ring_pages.num_pages, true); + if (ret) + goto err_free_slots; + dev->async_ring_state = dev->async_pdir.pages[0]; + dev->dsr->async_ring_pages.pdir_dma = dev->async_pdir.dir_dma; + + /* CQ notification ring */ + dev->dsr->cq_ring_pages.num_pages = PVRDMA_NUM_RING_PAGES; + ret = pvrdma_page_dir_init(dev, &dev->cq_pdir, + dev->dsr->cq_ring_pages.num_pages, true); + if (ret) + goto err_free_async_ring; + dev->cq_ring_state = dev->cq_pdir.pages[0]; + dev->dsr->cq_ring_pages.pdir_dma = dev->cq_pdir.dir_dma; + + /* + * Write the PA of the shared region to the device. The writes must be + * ordered such that the high bits are written last. When the writes + * complete, the device will have filled out the capabilities. + */ + + pvrdma_write_reg(dev, PVRDMA_REG_DSRLOW, (u32)dev->dsrbase); + pvrdma_write_reg(dev, PVRDMA_REG_DSRHIGH, + (u32)((u64)(dev->dsrbase) >> 32)); + + /* Make sure the write is complete before reading status. */ + mb(); + + /* The driver supports RoCE V1 and V2. */ + if (!PVRDMA_SUPPORTED(dev)) { + dev_err(&pdev->dev, "driver needs RoCE v1 or v2 support\n"); + ret = -EFAULT; + goto err_free_cq_ring; + } + + /* Paired vmxnet3 will have same bus, slot. But func will be 0 */ + pdev_net = pci_get_slot(pdev->bus, PCI_DEVFN(PCI_SLOT(pdev->devfn), 0)); + if (!pdev_net) { + dev_err(&pdev->dev, "failed to find paired net device\n"); + ret = -ENODEV; + goto err_free_cq_ring; + } + + if (pdev_net->vendor != PCI_VENDOR_ID_VMWARE || + pdev_net->device != PCI_DEVICE_ID_VMWARE_VMXNET3) { + dev_err(&pdev->dev, "failed to find paired vmxnet3 device\n"); + pci_dev_put(pdev_net); + ret = -ENODEV; + goto err_free_cq_ring; + } + + dev->netdev = pci_get_drvdata(pdev_net); + pci_dev_put(pdev_net); + if (!dev->netdev) { + dev_err(&pdev->dev, "failed to get vmxnet3 device\n"); + ret = -ENODEV; + goto err_free_cq_ring; + } + dev_hold(dev->netdev); + + dev_info(&pdev->dev, "paired device to %s\n", dev->netdev->name); + + /* Interrupt setup */ + ret = pvrdma_alloc_intrs(dev); + if (ret) { + dev_err(&pdev->dev, "failed to allocate interrupts\n"); + ret = -ENOMEM; + goto err_free_cq_ring; + } + + /* Allocate UAR table. */ + ret = pvrdma_uar_table_init(dev); + if (ret) { + dev_err(&pdev->dev, "failed to allocate UAR table\n"); + ret = -ENOMEM; + goto err_free_intrs; + } + + /* Allocate GID table */ + dev->sgid_tbl = kcalloc(dev->dsr->caps.gid_tbl_len, + sizeof(union ib_gid), GFP_KERNEL); + if (!dev->sgid_tbl) { + ret = -ENOMEM; + goto err_free_uar_table; + } + dev_dbg(&pdev->dev, "gid table len %d\n", dev->dsr->caps.gid_tbl_len); + + pvrdma_enable_intrs(dev); + + /* Activate pvrdma device */ + pvrdma_write_reg(dev, PVRDMA_REG_CTL, PVRDMA_DEVICE_CTL_ACTIVATE); + + /* Make sure the write is complete before reading status. */ + mb(); + + /* Check if device was successfully activated */ + ret = pvrdma_read_reg(dev, PVRDMA_REG_ERR); + if (ret != 0) { + dev_err(&pdev->dev, "failed to activate device\n"); + ret = -EFAULT; + goto err_disable_intr; + } + + /* Register IB device */ + ret = pvrdma_register_device(dev); + if (ret) { + dev_err(&pdev->dev, "failed to register IB device\n"); + goto err_disable_intr; + } + + dev->nb_netdev.notifier_call = pvrdma_netdevice_event; + ret = register_netdevice_notifier(&dev->nb_netdev); + if (ret) { + dev_err(&pdev->dev, "failed to register netdevice events\n"); + goto err_unreg_ibdev; + } + + dev_info(&pdev->dev, "attached to device\n"); + return 0; + +err_unreg_ibdev: + ib_unregister_device(&dev->ib_dev); +err_disable_intr: + pvrdma_disable_intrs(dev); + kfree(dev->sgid_tbl); +err_free_uar_table: + pvrdma_uar_table_cleanup(dev); +err_free_intrs: + pvrdma_free_irq(dev); + pci_free_irq_vectors(pdev); +err_free_cq_ring: + if (dev->netdev) { + dev_put(dev->netdev); + dev->netdev = NULL; + } + pvrdma_page_dir_cleanup(dev, &dev->cq_pdir); +err_free_async_ring: + pvrdma_page_dir_cleanup(dev, &dev->async_pdir); +err_free_slots: + pvrdma_free_slots(dev); +err_free_dsr: + dma_free_coherent(&pdev->dev, sizeof(*dev->dsr), dev->dsr, + dev->dsrbase); +err_uar_unmap: + iounmap(dev->driver_uar.map); +err_unmap_regs: + iounmap(dev->regs); +err_free_resource: + pci_release_regions(pdev); +err_disable_pdev: + pci_disable_device(pdev); + pci_set_drvdata(pdev, NULL); +err_free_device: + mutex_lock(&pvrdma_device_list_lock); + list_del(&dev->device_link); + mutex_unlock(&pvrdma_device_list_lock); + ib_dealloc_device(&dev->ib_dev); + return ret; +} + +static void pvrdma_pci_remove(struct pci_dev *pdev) +{ + struct pvrdma_dev *dev = pci_get_drvdata(pdev); + + if (!dev) + return; + + dev_info(&pdev->dev, "detaching from device\n"); + + unregister_netdevice_notifier(&dev->nb_netdev); + dev->nb_netdev.notifier_call = NULL; + + flush_workqueue(event_wq); + + if (dev->netdev) { + dev_put(dev->netdev); + dev->netdev = NULL; + } + + /* Unregister ib device */ + ib_unregister_device(&dev->ib_dev); + + mutex_lock(&pvrdma_device_list_lock); + list_del(&dev->device_link); + mutex_unlock(&pvrdma_device_list_lock); + + pvrdma_disable_intrs(dev); + pvrdma_free_irq(dev); + pci_free_irq_vectors(pdev); + + /* Deactivate pvrdma device */ + pvrdma_write_reg(dev, PVRDMA_REG_CTL, PVRDMA_DEVICE_CTL_RESET); + pvrdma_page_dir_cleanup(dev, &dev->cq_pdir); + pvrdma_page_dir_cleanup(dev, &dev->async_pdir); + pvrdma_free_slots(dev); + dma_free_coherent(&pdev->dev, sizeof(*dev->dsr), dev->dsr, + dev->dsrbase); + + iounmap(dev->regs); + kfree(dev->sgid_tbl); + kfree(dev->cq_tbl); + kfree(dev->srq_tbl); + kfree(dev->qp_tbl); + pvrdma_uar_table_cleanup(dev); + iounmap(dev->driver_uar.map); + + ib_dealloc_device(&dev->ib_dev); + + /* Free pci resources */ + pci_release_regions(pdev); + pci_disable_device(pdev); + pci_set_drvdata(pdev, NULL); +} + +static const struct pci_device_id pvrdma_pci_table[] = { + { PCI_DEVICE(PCI_VENDOR_ID_VMWARE, PCI_DEVICE_ID_VMWARE_PVRDMA), }, + { 0 }, +}; + +MODULE_DEVICE_TABLE(pci, pvrdma_pci_table); + +static struct pci_driver pvrdma_driver = { + .name = DRV_NAME, + .id_table = pvrdma_pci_table, + .probe = pvrdma_pci_probe, + .remove = pvrdma_pci_remove, +}; + +static int __init pvrdma_init(void) +{ + int err; + + event_wq = alloc_ordered_workqueue("pvrdma_event_wq", WQ_MEM_RECLAIM); + if (!event_wq) + return -ENOMEM; + + err = pci_register_driver(&pvrdma_driver); + if (err) + destroy_workqueue(event_wq); + + return err; +} + +static void __exit pvrdma_cleanup(void) +{ + pci_unregister_driver(&pvrdma_driver); + + destroy_workqueue(event_wq); +} + +module_init(pvrdma_init); +module_exit(pvrdma_cleanup); + +MODULE_AUTHOR("VMware, Inc"); +MODULE_DESCRIPTION("VMware Paravirtual RDMA driver"); +MODULE_LICENSE("Dual BSD/GPL"); |