| Message ID | 1467785688-23229-8-git-send-email-aditr@vmware.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
On Tue, Jul 05, 2016 at 11:14:40PM -0700, Adit Ranadive wrote: > This patch adds the support to register a RDMA device with the kernel RDMA > stack as well as a kernel module. This also initializes the underlying > virtual PCI device. > > Reviewed-by: Jorgen Hansen <jhansen@vmware.com> > Reviewed-by: George Zhang <georgezhang@vmware.com> > Reviewed-by: Aditya Sarwade <asarwade@vmware.com> > Reviewed-by: Bryan Tan <bryantan@vmware.com> > Signed-off-by: Adit Ranadive <aditr@vmware.com> > --- > drivers/infiniband/hw/pvrdma/pvrdma_main.c | 1188 ++++++++++++++++++++++++++++ > 1 file changed, 1188 insertions(+) > create mode 100644 drivers/infiniband/hw/pvrdma/pvrdma_main.c > > diff --git a/drivers/infiniband/hw/pvrdma/pvrdma_main.c b/drivers/infiniband/hw/pvrdma/pvrdma_main.c > new file mode 100644 > index 0000000..8b0cb01 > --- /dev/null > +++ b/drivers/infiniband/hw/pvrdma/pvrdma_main.c > @@ -0,0 +1,1188 @@ > +/* > + * 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" > +#include "pvrdma_user.h" > + > +#define PCI_DEVICE_ID_VMWARE_VMXNET3 0x07B0 > + > +#define DRV_NAME "pvrdma" > +#define DRV_VERSION "1.0" > +#define DRV_RELDATE "January 1, 2013" > + > +static const char pvrdma_version[] = > + DRV_NAME ": PVRDMA InfiniBand driver v" > + DRV_VERSION " (" DRV_RELDATE ")\n"; > + > +static DEFINE_MUTEX(pvrdma_device_list_lock); > +static LIST_HEAD(pvrdma_device_list); > + > +static int pvrdma_add_gid(struct ib_device *ibdev, > + u8 port_num, > + unsigned int index, > + const union ib_gid *gid, > + const struct ib_gid_attr *attr, > + void **context); > +static int pvrdma_del_gid(struct ib_device *ibdev, > + u8 port_num, > + unsigned int index, > + void **context); > + > + > +static ssize_t show_hca(struct device *device, struct device_attribute *attr, > + char *buf) > +{ > + return sprintf(buf, "PVRDMA%s\n", DRV_VERSION); > +} > + > +static ssize_t show_fw_ver(struct device *device, > + struct device_attribute *attr, char *buf) > +{ > + struct pvrdma_dev *dev = > + container_of(device, struct pvrdma_dev, ib_dev.dev); > + > + return sprintf(buf, "%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 ssize_t show_rev(struct device *device, struct device_attribute *attr, > + char *buf) > +{ > + return sprintf(buf, "%d\n", PVRDMA_REV_ID); > +} > + > +static ssize_t show_board(struct device *device, struct device_attribute *attr, > + char *buf) > +{ > + return sprintf(buf, "%d\n", PVRDMA_BOARD_ID); > +} > + > +static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL); > +static DEVICE_ATTR(fw_ver, S_IRUGO, show_fw_ver, NULL); > +static DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL); > +static DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL); > + > +static struct device_attribute *pvrdma_class_attributes[] = { > + &dev_attr_hw_rev, > + &dev_attr_fw_ver, > + &dev_attr_hca_type, > + &dev_attr_board_id > +}; > + > +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_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 ib_port_attr attr; > + int err; > + > + err = pvrdma_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->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE; > + immutable->max_mad_size = IB_MGMT_MAD_SIZE; > + return 0; > +} > + > +static struct net_device *pvrdma_get_netdev(struct ib_device *ibdev, > + u8 port_num) > +{ > + struct net_device *netdev; > + struct pvrdma_dev *dev = to_vdev(ibdev); > + > + if (port_num != 1) > + return NULL; > + > + rcu_read_lock(); > + netdev = dev->netdev; > + if (netdev) > + dev_hold(netdev); > + rcu_read_unlock(); > + > + return netdev; > +} > + > +static int pvrdma_register_device(struct pvrdma_dev *dev) > +{ > + int ret = -1; > + int i = 0; > + > + strlcpy(dev->ib_dev.name, "pvrdma%d", IB_DEVICE_NAME_MAX); > + 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.owner = THIS_MODULE; > + dev->ib_dev.num_comp_vectors = 1; > + dev->ib_dev.dma_device = &dev->pdev->dev; > + dev->ib_dev.uverbs_abi_ver = PVRDMA_UVERBS_ABI_VERSION; > + 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; > + > + dev->ib_dev.query_device = pvrdma_query_device; > + dev->ib_dev.query_port = pvrdma_query_port; > + dev->ib_dev.query_gid = pvrdma_query_gid; > + dev->ib_dev.query_pkey = pvrdma_query_pkey; > + dev->ib_dev.modify_port = pvrdma_modify_port; > + dev->ib_dev.alloc_ucontext = pvrdma_alloc_ucontext; > + dev->ib_dev.dealloc_ucontext = pvrdma_dealloc_ucontext; > + dev->ib_dev.mmap = pvrdma_mmap; > + dev->ib_dev.alloc_pd = pvrdma_alloc_pd; > + dev->ib_dev.dealloc_pd = pvrdma_dealloc_pd; > + dev->ib_dev.create_ah = pvrdma_create_ah; > + dev->ib_dev.destroy_ah = pvrdma_destroy_ah; > + dev->ib_dev.create_qp = pvrdma_create_qp; > + dev->ib_dev.modify_qp = pvrdma_modify_qp; > + dev->ib_dev.query_qp = pvrdma_query_qp; > + dev->ib_dev.destroy_qp = pvrdma_destroy_qp; > + dev->ib_dev.post_send = pvrdma_post_send; > + dev->ib_dev.post_recv = pvrdma_post_recv; > + dev->ib_dev.create_cq = pvrdma_create_cq; > + dev->ib_dev.modify_cq = pvrdma_modify_cq; > + dev->ib_dev.resize_cq = pvrdma_resize_cq; > + dev->ib_dev.destroy_cq = pvrdma_destroy_cq; > + dev->ib_dev.poll_cq = pvrdma_poll_cq; > + dev->ib_dev.req_notify_cq = pvrdma_req_notify_cq; > + dev->ib_dev.get_dma_mr = pvrdma_get_dma_mr; > + dev->ib_dev.reg_user_mr = pvrdma_reg_user_mr; > + dev->ib_dev.dereg_mr = pvrdma_dereg_mr; > + dev->ib_dev.alloc_mr = pvrdma_alloc_mr; > + dev->ib_dev.map_mr_sg = pvrdma_map_mr_sg; > + dev->ib_dev.add_gid = pvrdma_add_gid; > + dev->ib_dev.del_gid = pvrdma_del_gid; > + dev->ib_dev.get_netdev = pvrdma_get_netdev; > + dev->ib_dev.get_port_immutable = pvrdma_port_immutable; > + dev->ib_dev.get_link_layer = pvrdma_port_link_layer; > + > + mutex_init(&dev->port_mutex); > + spin_lock_init(&dev->desc_lock); > + > + dev->cq_tbl = kcalloc(dev->dsr->caps.max_cq, sizeof(void *), > + 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(void *), > + GFP_KERNEL); > + if (!dev->qp_tbl) > + goto err_cq_free; > + spin_lock_init(&dev->qp_tbl_lock); > + > + ret = ib_register_device(&dev->ib_dev, NULL); > + if (ret) > + goto err_qp_free; > + > + for (i = 0; i < ARRAY_SIZE(pvrdma_class_attributes); ++i) { > + ret = device_create_file(&dev->ib_dev.dev, > + pvrdma_class_attributes[i]); > + if (ret) > + goto err_class; > + } > + > + dev->ib_active = true; > + > + return 0; > + > +err_class: > + ib_unregister_device(&dev->ib_dev); > +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; > + struct pvrdma_dev *dev = dev_id; > + > + dev_dbg(&dev->pdev->dev, "interrupt 0 (response) handler\n"); > + > + if (dev->intr.type == PVRDMA_INTR_TYPE_MSIX) { > + icr = PVRDMA_INTR_CAUSE_RESPONSE; > + } else { > + /* 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); Can you consider the following minor cosmetic change to avoid if-else? u32 icr = PVRDMA_INTR_CAUSE_RESPONSE; if (dev->intr.type != PVRDMA_INTR_TYPE_MSIX) { /* 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) > + atomic_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) { > + atomic_dec(&qp->refcnt); > + if (atomic_read(&qp->refcnt) == 0) > + wake_up(&qp->wait); > + } > +} > + > +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) > + atomic_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) { > + atomic_dec(&cq->refcnt); > + if (atomic_read(&cq->refcnt) == 0) > + wake_up(&cq->wait); > + } > +} > + > +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: > + 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) > + atomic_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) { > + atomic_dec(&cq->refcnt); > + if (atomic_read(&cq->refcnt)) > + wake_up(&cq->wait); > + } > + pvrdma_idx_ring_inc(&ring->cons_head, ring_slots); > + } > + > + return IRQ_HANDLED; > +} > + > +static void pvrdma_disable_msi_all(struct pvrdma_dev *dev) > +{ > + if (dev->intr.type == PVRDMA_INTR_TYPE_MSIX) > + pci_disable_msix(dev->pdev); > + else if (dev->intr.type == PVRDMA_INTR_TYPE_MSI) > + pci_disable_msi(dev->pdev); > +} > + > +static void pvrdma_free_irq(struct pvrdma_dev *dev) > +{ > + int i; > + > + dev_dbg(&dev->pdev->dev, "freeing interrupts\n"); > + > + if (dev->intr.type == PVRDMA_INTR_TYPE_MSIX) { > + for (i = 0; i < dev->intr.size; i++) { > + if (dev->intr.enabled[i]) { > + free_irq(dev->intr.msix_entry[i].vector, dev); > + dev->intr.enabled[i] = 0; > + } > + } > + } else if (dev->intr.type == PVRDMA_INTR_TYPE_INTX || > + dev->intr.type == PVRDMA_INTR_TYPE_MSI) { > + free_irq(dev->pdev->irq, dev); Curly braces are not needed here > + } > +} > + > +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_enable_msix(struct pci_dev *pdev, struct pvrdma_dev *dev) > +{ > + int i; > + int ret; > + > + for (i = 0; i < PVRDMA_MAX_INTERRUPTS; i++) { > + dev->intr.msix_entry[i].entry = i; > + dev->intr.msix_entry[i].vector = i; > + > + switch (i) { > + case 0: > + /* CMD ring handler */ > + dev->intr.handler[i] = pvrdma_intr0_handler; > + break; > + case 1: > + /* Async event ring handler */ > + dev->intr.handler[i] = pvrdma_intr1_handler; > + break; > + default: > + /* Completion queue handler */ > + dev->intr.handler[i] = pvrdma_intrx_handler; > + break; > + } > + } > + > + ret = pci_enable_msix(pdev, dev->intr.msix_entry, > + PVRDMA_MAX_INTERRUPTS); > + if (!ret) { > + dev->intr.type = PVRDMA_INTR_TYPE_MSIX; > + dev->intr.size = PVRDMA_MAX_INTERRUPTS; > + } else if (ret > 0) { > + ret = pci_enable_msix(pdev, dev->intr.msix_entry, ret); > + if (!ret) { > + dev->intr.type = PVRDMA_INTR_TYPE_MSIX; > + dev->intr.size = ret; > + } else { > + dev->intr.size = 0; > + } > + } > + > + dev_dbg(&pdev->dev, "using interrupt type %d, size %d\n", > + dev->intr.type, dev->intr.size); > + > + return ret; > +} > + > +static int pvrdma_alloc_intrs(struct pvrdma_dev *dev) > +{ > + int ret = 0; > + int i; > + > + if (pci_find_capability(dev->pdev, PCI_CAP_ID_MSIX) && > + pvrdma_enable_msix(dev->pdev, dev)) { > + /* Try MSI */ > + ret = pci_enable_msi(dev->pdev); > + if (!ret) { > + dev->intr.type = PVRDMA_INTR_TYPE_MSI; > + } else { > + /* Legacy INTR */ > + dev->intr.type = PVRDMA_INTR_TYPE_INTX; > + } > + } > + > + /* Request First IRQ */ > + switch (dev->intr.type) { > + case PVRDMA_INTR_TYPE_INTX: > + case PVRDMA_INTR_TYPE_MSI: > + ret = request_irq(dev->pdev->irq, pvrdma_intr0_handler, > + IRQF_SHARED, DRV_NAME, dev); > + if (ret) { > + dev_err(&dev->pdev->dev, > + "failed to request interrupt\n"); > + goto disable_msi; > + } > + break; > + case PVRDMA_INTR_TYPE_MSIX: > + ret = request_irq(dev->intr.msix_entry[0].vector, > + pvrdma_intr0_handler, 0, DRV_NAME, dev); > + if (ret) { > + dev_err(&dev->pdev->dev, > + "failed to request interrupt 0\n"); > + goto disable_msi; > + } > + dev->intr.enabled[0] = 1; > + break; > + default: > + /* Not reached */ > + break; > + } > + > + /* For MSIX: request intr for each vector */ > + if (dev->intr.size > 1) { > + ret = request_irq(dev->intr.msix_entry[1].vector, > + pvrdma_intr1_handler, 0, DRV_NAME, dev); > + if (ret) { > + dev_err(&dev->pdev->dev, > + "failed to request interrupt 1\n"); > + goto free_irq; > + } > + dev->intr.enabled[1] = 1; > + > + for (i = 2; i < dev->intr.size; i++) { > + ret = request_irq(dev->intr.msix_entry[i].vector, > + pvrdma_intrx_handler, 0, > + DRV_NAME, dev); > + if (ret) { > + dev_err(&dev->pdev->dev, > + "failed to request interrupt %d\n", i); > + goto free_irq; > + } > + dev->intr.enabled[i] = 1; > + } > + } > + > + return 0; > + > +free_irq: > + pvrdma_free_irq(dev); > +disable_msi: > + pvrdma_disable_msi_all(dev); > + 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, > + 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 = PVRDMA_GID_TYPE_FLAG_ROCE_V1; > + > + ret = pvrdma_cmd_post(dev, &req, false, NULL); > + if (ret < 0) { > + dev_warn(&dev->pdev->dev, "could not create binding\n"); > + return -EINVAL; > + } > + memcpy(&dev->sgid_tbl[index], gid, sizeof(*gid)); > + return 0; > +} > + > +static int pvrdma_add_gid(struct ib_device *ibdev, > + u8 port_num, > + unsigned int index, > + const union ib_gid *gid, > + const struct ib_gid_attr *attr, > + void **context) > +{ > + struct pvrdma_dev *dev = to_vdev(ibdev); > + > + return pvrdma_add_gid_at_index(dev, gid, 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, false, NULL); > + if (ret < 0) { > + dev_warn(&dev->pdev->dev, > + "could not destroy binding\n"); > + return ret; > + } > + memset(&dev->sgid_tbl[index], 0, 16); > + return 0; > +} > + > +static int pvrdma_del_gid(struct ib_device *ibdev, > + u8 port_num, > + unsigned int index, > + void **context) > +{ > + struct pvrdma_dev *dev = to_vdev(ibdev); > + > + dev_dbg(&dev->pdev->dev, "removing gid at index %u from %s", > + index, dev->netdev->name); > + > + return pvrdma_del_gid_at_index(dev, index); > +} > + > +static void pvrdma_netdevice_event_handle(struct pvrdma_dev *dev, > + unsigned long event) > +{ > + struct net_device *netdev; > + > + netdev = dev->netdev; > + switch (event) { > + case NETDEV_REBOOT: > + case NETDEV_DOWN: > + pvrdma_dispatch_event(dev, 1, IB_EVENT_PORT_ERR); > + break; > + case NETDEV_UP: > + pvrdma_dispatch_event(dev, 1, IB_EVENT_PORT_ACTIVE); > + break; > + default: > + dev_dbg(&dev->pdev->dev, "ignore netdevice event %ld on %s\n", > + event, dev->ib_dev.name); > + break; > + } > +} > + > +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_dev *dev; > + > + mutex_lock(&pvrdma_device_list_lock); > + list_for_each_entry(dev, &pvrdma_device_list, device_link) { > + if (dev->netdev == event_netdev) { > + pvrdma_netdevice_event_handle(dev, event); > + break; > + } > + } > + mutex_unlock(&pvrdma_device_list_lock); > + > + 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; > + unsigned int version; > + > + dev_dbg(&pdev->dev, "initializing driver %s\n", pci_name(pdev)); > + > + /* Allocate zero-out device */ > + dev = (struct pvrdma_dev *)ib_alloc_device(sizeof(*dev)); > + if (!dev) { > + dev_err(&pdev->dev, "failed to allocate IB device\n"); > + ret = -ENOMEM; > + return ret; Can't we just do "return -ENOMEM;" ? (probably left-over when you changed it from "goto") > + } > + > + 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; > + } > + > + /* > + * DEBUG: Checking PCI: 0x20200; _MEM; len=0x2000 > + */ > + 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_free_device; > + } > + > + 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; > + } > + } > + > + 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; > + } > + > + version = pvrdma_read_reg(dev, PVRDMA_REG_VERSION); > + dev_info(&pdev->dev, "device version %d, driver version %d\n", > + version, PVRDMA_VERSION); > + if (version < PVRDMA_VERSION) { > + dev_err(&pdev->dev, "incompatible device version\n"); > + goto err_uar_unmap; > + } > + > + 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 */ > + memset(dev->dsr, 0, sizeof(*dev->dsr)); > + 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; > + dev->dsr->uar_pfn = dev->driver_uar.pfn; > + > + /* Command slot. */ > + dev->cmd_slot = dma_alloc_coherent(&pdev->dev, PAGE_SIZE, > + &dev->dsr->cmd_slot_dma, > + GFP_KERNEL); > + if (!dev->cmd_slot) { > + ret = -ENOMEM; > + goto err_free_dsr; > + } > + > + /* Response slot. */ > + dev->resp_slot = dma_alloc_coherent(&pdev->dev, PAGE_SIZE, > + &dev->dsr->resp_slot_dma, > + GFP_KERNEL); > + if (!dev->resp_slot) { > + ret = -ENOMEM; > + goto err_free_slots; > + } > + > + /* Async event ring */ > + dev->dsr->async_ring_pages.num_pages = 4; > + 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 = 4; > + 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)((dev->dsrbase) >> 32)); > + > + /* Make sure the write is complete before reading status. */ > + mb(); > + > + /* Currently, the driver only supports RoCE mode. */ > + if (dev->dsr->caps.mode != PVRDMA_DEVICE_MODE_ROCE) { > + dev_err(&pdev->dev, "unsupported transport %d\n", > + dev->dsr->caps.mode); > + ret = -EINVAL; > + goto err_free_cq_ring; > + } > + > + /* Currently, the driver only supports RoCE V1. */ > + if (!(dev->dsr->caps.gid_types & PVRDMA_GID_TYPE_FLAG_ROCE_V1)) { > + dev_err(&pdev->dev, "driver needs RoCE v1 support\n"); > + ret = -EINVAL; > + 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_info(&pdev->dev, "paired device to %s\n", dev->netdev->name); > + > + 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_free_cq_ring; > + } > + > + /* Interrupt setup */ > + ret = pvrdma_alloc_intrs(dev); > + if (ret) { > + dev_err(&pdev->dev, "failed to allocate interrupts\n"); > + ret = -ENOMEM; > + goto err_netdevice; > + } > + > + /* 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 = -EINVAL; > + 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_info(&pdev->dev, "attached to device\n"); > + return 0; > + > +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); > + pvrdma_disable_msi_all(dev); > +err_netdevice: > + unregister_netdevice_notifier(&dev->nb_netdev); > +err_free_cq_ring: > + 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"); > + > + mutex_lock(&pvrdma_device_list_lock); > + list_del(&dev->device_link); > + mutex_unlock(&pvrdma_device_list_lock); > + > + /* Unregister ib device */ > + ib_unregister_device(&dev->ib_dev); > + > + pvrdma_disable_intrs(dev); > + pvrdma_free_irq(dev); > + pvrdma_disable_msi_all(dev); > + > + unregister_netdevice_notifier(&dev->nb_netdev); > + > + /* 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); > + > + iounmap(dev->regs); > + kfree(dev->sgid_tbl); > + kfree(dev->cq_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 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) > +{ > + return pci_register_driver(&pvrdma_driver); > +} > + > +static void __exit pvrdma_cleanup(void) > +{ > + pci_unregister_driver(&pvrdma_driver); > +} > + > +module_init(pvrdma_init); > +module_exit(pvrdma_cleanup); > + > +MODULE_AUTHOR("VMware, Inc"); > +MODULE_DESCRIPTION("VMware Virtual RDMA/InfiniBand driver"); > +MODULE_VERSION(DRV_VERSION); > +MODULE_LICENSE("Dual BSD/GPL"); > -- > 2.7.4 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-rdma" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/infiniband/hw/pvrdma/pvrdma_main.c b/drivers/infiniband/hw/pvrdma/pvrdma_main.c new file mode 100644 index 0000000..8b0cb01 --- /dev/null +++ b/drivers/infiniband/hw/pvrdma/pvrdma_main.c @@ -0,0 +1,1188 @@ +/* + * 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" +#include "pvrdma_user.h" + +#define PCI_DEVICE_ID_VMWARE_VMXNET3 0x07B0 + +#define DRV_NAME "pvrdma" +#define DRV_VERSION "1.0" +#define DRV_RELDATE "January 1, 2013" + +static const char pvrdma_version[] = + DRV_NAME ": PVRDMA InfiniBand driver v" + DRV_VERSION " (" DRV_RELDATE ")\n"; + +static DEFINE_MUTEX(pvrdma_device_list_lock); +static LIST_HEAD(pvrdma_device_list); + +static int pvrdma_add_gid(struct ib_device *ibdev, + u8 port_num, + unsigned int index, + const union ib_gid *gid, + const struct ib_gid_attr *attr, + void **context); +static int pvrdma_del_gid(struct ib_device *ibdev, + u8 port_num, + unsigned int index, + void **context); + + +static ssize_t show_hca(struct device *device, struct device_attribute *attr, + char *buf) +{ + return sprintf(buf, "PVRDMA%s\n", DRV_VERSION); +} + +static ssize_t show_fw_ver(struct device *device, + struct device_attribute *attr, char *buf) +{ + struct pvrdma_dev *dev = + container_of(device, struct pvrdma_dev, ib_dev.dev); + + return sprintf(buf, "%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 ssize_t show_rev(struct device *device, struct device_attribute *attr, + char *buf) +{ + return sprintf(buf, "%d\n", PVRDMA_REV_ID); +} + +static ssize_t show_board(struct device *device, struct device_attribute *attr, + char *buf) +{ + return sprintf(buf, "%d\n", PVRDMA_BOARD_ID); +} + +static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL); +static DEVICE_ATTR(fw_ver, S_IRUGO, show_fw_ver, NULL); +static DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL); +static DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL); + +static struct device_attribute *pvrdma_class_attributes[] = { + &dev_attr_hw_rev, + &dev_attr_fw_ver, + &dev_attr_hca_type, + &dev_attr_board_id +}; + +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_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 ib_port_attr attr; + int err; + + err = pvrdma_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->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE; + immutable->max_mad_size = IB_MGMT_MAD_SIZE; + return 0; +} + +static struct net_device *pvrdma_get_netdev(struct ib_device *ibdev, + u8 port_num) +{ + struct net_device *netdev; + struct pvrdma_dev *dev = to_vdev(ibdev); + + if (port_num != 1) + return NULL; + + rcu_read_lock(); + netdev = dev->netdev; + if (netdev) + dev_hold(netdev); + rcu_read_unlock(); + + return netdev; +} + +static int pvrdma_register_device(struct pvrdma_dev *dev) +{ + int ret = -1; + int i = 0; + + strlcpy(dev->ib_dev.name, "pvrdma%d", IB_DEVICE_NAME_MAX); + 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.owner = THIS_MODULE; + dev->ib_dev.num_comp_vectors = 1; + dev->ib_dev.dma_device = &dev->pdev->dev; + dev->ib_dev.uverbs_abi_ver = PVRDMA_UVERBS_ABI_VERSION; + 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; + + dev->ib_dev.query_device = pvrdma_query_device; + dev->ib_dev.query_port = pvrdma_query_port; + dev->ib_dev.query_gid = pvrdma_query_gid; + dev->ib_dev.query_pkey = pvrdma_query_pkey; + dev->ib_dev.modify_port = pvrdma_modify_port; + dev->ib_dev.alloc_ucontext = pvrdma_alloc_ucontext; + dev->ib_dev.dealloc_ucontext = pvrdma_dealloc_ucontext; + dev->ib_dev.mmap = pvrdma_mmap; + dev->ib_dev.alloc_pd = pvrdma_alloc_pd; + dev->ib_dev.dealloc_pd = pvrdma_dealloc_pd; + dev->ib_dev.create_ah = pvrdma_create_ah; + dev->ib_dev.destroy_ah = pvrdma_destroy_ah; + dev->ib_dev.create_qp = pvrdma_create_qp; + dev->ib_dev.modify_qp = pvrdma_modify_qp; + dev->ib_dev.query_qp = pvrdma_query_qp; + dev->ib_dev.destroy_qp = pvrdma_destroy_qp; + dev->ib_dev.post_send = pvrdma_post_send; + dev->ib_dev.post_recv = pvrdma_post_recv; + dev->ib_dev.create_cq = pvrdma_create_cq; + dev->ib_dev.modify_cq = pvrdma_modify_cq; + dev->ib_dev.resize_cq = pvrdma_resize_cq; + dev->ib_dev.destroy_cq = pvrdma_destroy_cq; + dev->ib_dev.poll_cq = pvrdma_poll_cq; + dev->ib_dev.req_notify_cq = pvrdma_req_notify_cq; + dev->ib_dev.get_dma_mr = pvrdma_get_dma_mr; + dev->ib_dev.reg_user_mr = pvrdma_reg_user_mr; + dev->ib_dev.dereg_mr = pvrdma_dereg_mr; + dev->ib_dev.alloc_mr = pvrdma_alloc_mr; + dev->ib_dev.map_mr_sg = pvrdma_map_mr_sg; + dev->ib_dev.add_gid = pvrdma_add_gid; + dev->ib_dev.del_gid = pvrdma_del_gid; + dev->ib_dev.get_netdev = pvrdma_get_netdev; + dev->ib_dev.get_port_immutable = pvrdma_port_immutable; + dev->ib_dev.get_link_layer = pvrdma_port_link_layer; + + mutex_init(&dev->port_mutex); + spin_lock_init(&dev->desc_lock); + + dev->cq_tbl = kcalloc(dev->dsr->caps.max_cq, sizeof(void *), + 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(void *), + GFP_KERNEL); + if (!dev->qp_tbl) + goto err_cq_free; + spin_lock_init(&dev->qp_tbl_lock); + + ret = ib_register_device(&dev->ib_dev, NULL); + if (ret) + goto err_qp_free; + + for (i = 0; i < ARRAY_SIZE(pvrdma_class_attributes); ++i) { + ret = device_create_file(&dev->ib_dev.dev, + pvrdma_class_attributes[i]); + if (ret) + goto err_class; + } + + dev->ib_active = true; + + return 0; + +err_class: + ib_unregister_device(&dev->ib_dev); +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; + struct pvrdma_dev *dev = dev_id; + + dev_dbg(&dev->pdev->dev, "interrupt 0 (response) handler\n"); + + if (dev->intr.type == PVRDMA_INTR_TYPE_MSIX) { + icr = PVRDMA_INTR_CAUSE_RESPONSE; + } else { + /* 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) + atomic_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) { + atomic_dec(&qp->refcnt); + if (atomic_read(&qp->refcnt) == 0) + wake_up(&qp->wait); + } +} + +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) + atomic_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) { + atomic_dec(&cq->refcnt); + if (atomic_read(&cq->refcnt) == 0) + wake_up(&cq->wait); + } +} + +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: + 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) + atomic_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) { + atomic_dec(&cq->refcnt); + if (atomic_read(&cq->refcnt)) + wake_up(&cq->wait); + } + pvrdma_idx_ring_inc(&ring->cons_head, ring_slots); + } + + return IRQ_HANDLED; +} + +static void pvrdma_disable_msi_all(struct pvrdma_dev *dev) +{ + if (dev->intr.type == PVRDMA_INTR_TYPE_MSIX) + pci_disable_msix(dev->pdev); + else if (dev->intr.type == PVRDMA_INTR_TYPE_MSI) + pci_disable_msi(dev->pdev); +} + +static void pvrdma_free_irq(struct pvrdma_dev *dev) +{ + int i; + + dev_dbg(&dev->pdev->dev, "freeing interrupts\n"); + + if (dev->intr.type == PVRDMA_INTR_TYPE_MSIX) { + for (i = 0; i < dev->intr.size; i++) { + if (dev->intr.enabled[i]) { + free_irq(dev->intr.msix_entry[i].vector, dev); + dev->intr.enabled[i] = 0; + } + } + } else if (dev->intr.type == PVRDMA_INTR_TYPE_INTX || + dev->intr.type == PVRDMA_INTR_TYPE_MSI) { + free_irq(dev->pdev->irq, 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_enable_msix(struct pci_dev *pdev, struct pvrdma_dev *dev) +{ + int i; + int ret; + + for (i = 0; i < PVRDMA_MAX_INTERRUPTS; i++) { + dev->intr.msix_entry[i].entry = i; + dev->intr.msix_entry[i].vector = i; + + switch (i) { + case 0: + /* CMD ring handler */ + dev->intr.handler[i] = pvrdma_intr0_handler; + break; + case 1: + /* Async event ring handler */ + dev->intr.handler[i] = pvrdma_intr1_handler; + break; + default: + /* Completion queue handler */ + dev->intr.handler[i] = pvrdma_intrx_handler; + break; + } + } + + ret = pci_enable_msix(pdev, dev->intr.msix_entry, + PVRDMA_MAX_INTERRUPTS); + if (!ret) { + dev->intr.type = PVRDMA_INTR_TYPE_MSIX; + dev->intr.size = PVRDMA_MAX_INTERRUPTS; + } else if (ret > 0) { + ret = pci_enable_msix(pdev, dev->intr.msix_entry, ret); + if (!ret) { + dev->intr.type = PVRDMA_INTR_TYPE_MSIX; + dev->intr.size = ret; + } else { + dev->intr.size = 0; + } + } + + dev_dbg(&pdev->dev, "using interrupt type %d, size %d\n", + dev->intr.type, dev->intr.size); + + return ret; +} + +static int pvrdma_alloc_intrs(struct pvrdma_dev *dev) +{ + int ret = 0; + int i; + + if (pci_find_capability(dev->pdev, PCI_CAP_ID_MSIX) && + pvrdma_enable_msix(dev->pdev, dev)) { + /* Try MSI */ + ret = pci_enable_msi(dev->pdev); + if (!ret) { + dev->intr.type = PVRDMA_INTR_TYPE_MSI; + } else { + /* Legacy INTR */ + dev->intr.type = PVRDMA_INTR_TYPE_INTX; + } + } + + /* Request First IRQ */ + switch (dev->intr.type) { + case PVRDMA_INTR_TYPE_INTX: + case PVRDMA_INTR_TYPE_MSI: + ret = request_irq(dev->pdev->irq, pvrdma_intr0_handler, + IRQF_SHARED, DRV_NAME, dev); + if (ret) { + dev_err(&dev->pdev->dev, + "failed to request interrupt\n"); + goto disable_msi; + } + break; + case PVRDMA_INTR_TYPE_MSIX: + ret = request_irq(dev->intr.msix_entry[0].vector, + pvrdma_intr0_handler, 0, DRV_NAME, dev); + if (ret) { + dev_err(&dev->pdev->dev, + "failed to request interrupt 0\n"); + goto disable_msi; + } + dev->intr.enabled[0] = 1; + break; + default: + /* Not reached */ + break; + } + + /* For MSIX: request intr for each vector */ + if (dev->intr.size > 1) { + ret = request_irq(dev->intr.msix_entry[1].vector, + pvrdma_intr1_handler, 0, DRV_NAME, dev); + if (ret) { + dev_err(&dev->pdev->dev, + "failed to request interrupt 1\n"); + goto free_irq; + } + dev->intr.enabled[1] = 1; + + for (i = 2; i < dev->intr.size; i++) { + ret = request_irq(dev->intr.msix_entry[i].vector, + pvrdma_intrx_handler, 0, + DRV_NAME, dev); + if (ret) { + dev_err(&dev->pdev->dev, + "failed to request interrupt %d\n", i); + goto free_irq; + } + dev->intr.enabled[i] = 1; + } + } + + return 0; + +free_irq: + pvrdma_free_irq(dev); +disable_msi: + pvrdma_disable_msi_all(dev); + 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, + 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 = PVRDMA_GID_TYPE_FLAG_ROCE_V1; + + ret = pvrdma_cmd_post(dev, &req, false, NULL); + if (ret < 0) { + dev_warn(&dev->pdev->dev, "could not create binding\n"); + return -EINVAL; + } + memcpy(&dev->sgid_tbl[index], gid, sizeof(*gid)); + return 0; +} + +static int pvrdma_add_gid(struct ib_device *ibdev, + u8 port_num, + unsigned int index, + const union ib_gid *gid, + const struct ib_gid_attr *attr, + void **context) +{ + struct pvrdma_dev *dev = to_vdev(ibdev); + + return pvrdma_add_gid_at_index(dev, gid, 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, false, NULL); + if (ret < 0) { + dev_warn(&dev->pdev->dev, + "could not destroy binding\n"); + return ret; + } + memset(&dev->sgid_tbl[index], 0, 16); + return 0; +} + +static int pvrdma_del_gid(struct ib_device *ibdev, + u8 port_num, + unsigned int index, + void **context) +{ + struct pvrdma_dev *dev = to_vdev(ibdev); + + dev_dbg(&dev->pdev->dev, "removing gid at index %u from %s", + index, dev->netdev->name); + + return pvrdma_del_gid_at_index(dev, index); +} + +static void pvrdma_netdevice_event_handle(struct pvrdma_dev *dev, + unsigned long event) +{ + struct net_device *netdev; + + netdev = dev->netdev; + switch (event) { + case NETDEV_REBOOT: + case NETDEV_DOWN: + pvrdma_dispatch_event(dev, 1, IB_EVENT_PORT_ERR); + break; + case NETDEV_UP: + pvrdma_dispatch_event(dev, 1, IB_EVENT_PORT_ACTIVE); + break; + default: + dev_dbg(&dev->pdev->dev, "ignore netdevice event %ld on %s\n", + event, dev->ib_dev.name); + break; + } +} + +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_dev *dev; + + mutex_lock(&pvrdma_device_list_lock); + list_for_each_entry(dev, &pvrdma_device_list, device_link) { + if (dev->netdev == event_netdev) { + pvrdma_netdevice_event_handle(dev, event); + break; + } + } + mutex_unlock(&pvrdma_device_list_lock); + + 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; + unsigned int version; + + dev_dbg(&pdev->dev, "initializing driver %s\n", pci_name(pdev)); + + /* Allocate zero-out device */ + dev = (struct pvrdma_dev *)ib_alloc_device(sizeof(*dev)); + if (!dev) { + dev_err(&pdev->dev, "failed to allocate IB device\n"); + ret = -ENOMEM; + return ret; + } + + 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; + } + + /* + * DEBUG: Checking PCI: 0x20200; _MEM; len=0x2000 + */ + 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_free_device; + } + + 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; + } + } + + 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; + } + + version = pvrdma_read_reg(dev, PVRDMA_REG_VERSION); + dev_info(&pdev->dev, "device version %d, driver version %d\n", + version, PVRDMA_VERSION); + if (version < PVRDMA_VERSION) { + dev_err(&pdev->dev, "incompatible device version\n"); + goto err_uar_unmap; + } + + 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 */ + memset(dev->dsr, 0, sizeof(*dev->dsr)); + 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; + dev->dsr->uar_pfn = dev->driver_uar.pfn; + + /* Command slot. */ + dev->cmd_slot = dma_alloc_coherent(&pdev->dev, PAGE_SIZE, + &dev->dsr->cmd_slot_dma, + GFP_KERNEL); + if (!dev->cmd_slot) { + ret = -ENOMEM; + goto err_free_dsr; + } + + /* Response slot. */ + dev->resp_slot = dma_alloc_coherent(&pdev->dev, PAGE_SIZE, + &dev->dsr->resp_slot_dma, + GFP_KERNEL); + if (!dev->resp_slot) { + ret = -ENOMEM; + goto err_free_slots; + } + + /* Async event ring */ + dev->dsr->async_ring_pages.num_pages = 4; + 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 = 4; + 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)((dev->dsrbase) >> 32)); + + /* Make sure the write is complete before reading status. */ + mb(); + + /* Currently, the driver only supports RoCE mode. */ + if (dev->dsr->caps.mode != PVRDMA_DEVICE_MODE_ROCE) { + dev_err(&pdev->dev, "unsupported transport %d\n", + dev->dsr->caps.mode); + ret = -EINVAL; + goto err_free_cq_ring; + } + + /* Currently, the driver only supports RoCE V1. */ + if (!(dev->dsr->caps.gid_types & PVRDMA_GID_TYPE_FLAG_ROCE_V1)) { + dev_err(&pdev->dev, "driver needs RoCE v1 support\n"); + ret = -EINVAL; + 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_info(&pdev->dev, "paired device to %s\n", dev->netdev->name); + + 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_free_cq_ring; + } + + /* Interrupt setup */ + ret = pvrdma_alloc_intrs(dev); + if (ret) { + dev_err(&pdev->dev, "failed to allocate interrupts\n"); + ret = -ENOMEM; + goto err_netdevice; + } + + /* 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 = -EINVAL; + 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_info(&pdev->dev, "attached to device\n"); + return 0; + +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); + pvrdma_disable_msi_all(dev); +err_netdevice: + unregister_netdevice_notifier(&dev->nb_netdev); +err_free_cq_ring: + 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"); + + mutex_lock(&pvrdma_device_list_lock); + list_del(&dev->device_link); + mutex_unlock(&pvrdma_device_list_lock); + + /* Unregister ib device */ + ib_unregister_device(&dev->ib_dev); + + pvrdma_disable_intrs(dev); + pvrdma_free_irq(dev); + pvrdma_disable_msi_all(dev); + + unregister_netdevice_notifier(&dev->nb_netdev); + + /* 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); + + iounmap(dev->regs); + kfree(dev->sgid_tbl); + kfree(dev->cq_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 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) +{ + return pci_register_driver(&pvrdma_driver); +} + +static void __exit pvrdma_cleanup(void) +{ + pci_unregister_driver(&pvrdma_driver); +} + +module_init(pvrdma_init); +module_exit(pvrdma_cleanup); + +MODULE_AUTHOR("VMware, Inc"); +MODULE_DESCRIPTION("VMware Virtual RDMA/InfiniBand driver"); +MODULE_VERSION(DRV_VERSION); +MODULE_LICENSE("Dual BSD/GPL");