diff options
Diffstat (limited to 'drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.c')
| -rw-r--r-- | drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.c | 579 |
1 files changed, 579 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.c b/drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.c new file mode 100644 index 000000000000..fec17c49103b --- /dev/null +++ b/drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.c @@ -0,0 +1,579 @@ +/* + * 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 <asm/page.h> +#include <linux/inet.h> +#include <linux/io.h> +#include <rdma/ib_addr.h> +#include <rdma/ib_smi.h> +#include <rdma/ib_user_verbs.h> +#include <rdma/vmw_pvrdma-abi.h> + +#include "pvrdma.h" + +/** + * pvrdma_query_device - query device + * @ibdev: the device to query + * @props: the device properties + * @uhw: user data + * + * @return: 0 on success, otherwise negative errno + */ +int pvrdma_query_device(struct ib_device *ibdev, + struct ib_device_attr *props, + struct ib_udata *uhw) +{ + struct pvrdma_dev *dev = to_vdev(ibdev); + + if (uhw->inlen || uhw->outlen) + return -EINVAL; + + memset(props, 0, sizeof(*props)); + + props->fw_ver = dev->dsr->caps.fw_ver; + props->sys_image_guid = dev->dsr->caps.sys_image_guid; + props->max_mr_size = dev->dsr->caps.max_mr_size; + props->page_size_cap = dev->dsr->caps.page_size_cap; + props->vendor_id = dev->dsr->caps.vendor_id; + props->vendor_part_id = dev->pdev->device; + props->hw_ver = dev->dsr->caps.hw_ver; + props->max_qp = dev->dsr->caps.max_qp; + props->max_qp_wr = dev->dsr->caps.max_qp_wr; + props->device_cap_flags = dev->dsr->caps.device_cap_flags; + props->max_sge = dev->dsr->caps.max_sge; + props->max_cq = dev->dsr->caps.max_cq; + props->max_cqe = dev->dsr->caps.max_cqe; + props->max_mr = dev->dsr->caps.max_mr; + props->max_pd = dev->dsr->caps.max_pd; + props->max_qp_rd_atom = dev->dsr->caps.max_qp_rd_atom; + props->max_qp_init_rd_atom = dev->dsr->caps.max_qp_init_rd_atom; + props->atomic_cap = + dev->dsr->caps.atomic_ops & + (PVRDMA_ATOMIC_OP_COMP_SWAP | PVRDMA_ATOMIC_OP_FETCH_ADD) ? + IB_ATOMIC_HCA : IB_ATOMIC_NONE; + props->masked_atomic_cap = props->atomic_cap; + props->max_ah = dev->dsr->caps.max_ah; + props->max_pkeys = dev->dsr->caps.max_pkeys; + props->local_ca_ack_delay = dev->dsr->caps.local_ca_ack_delay; + if ((dev->dsr->caps.bmme_flags & PVRDMA_BMME_FLAG_LOCAL_INV) && + (dev->dsr->caps.bmme_flags & PVRDMA_BMME_FLAG_REMOTE_INV) && + (dev->dsr->caps.bmme_flags & PVRDMA_BMME_FLAG_FAST_REG_WR)) { + props->device_cap_flags |= IB_DEVICE_MEM_MGT_EXTENSIONS; + } + + return 0; +} + +/** + * pvrdma_query_port - query device port attributes + * @ibdev: the device to query + * @port: the port number + * @props: the device properties + * + * @return: 0 on success, otherwise negative errno + */ +int pvrdma_query_port(struct ib_device *ibdev, u8 port, + struct ib_port_attr *props) +{ + struct pvrdma_dev *dev = to_vdev(ibdev); + union pvrdma_cmd_req req; + union pvrdma_cmd_resp rsp; + struct pvrdma_cmd_query_port *cmd = &req.query_port; + struct pvrdma_cmd_query_port_resp *resp = &rsp.query_port_resp; + int err; + + memset(cmd, 0, sizeof(*cmd)); + cmd->hdr.cmd = PVRDMA_CMD_QUERY_PORT; + cmd->port_num = port; + + err = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_QUERY_PORT_RESP); + if (err < 0) { + dev_warn(&dev->pdev->dev, + "could not query port, error: %d\n", err); + return err; + } + + /* props being zeroed by the caller, avoid zeroing it here */ + + props->state = pvrdma_port_state_to_ib(resp->attrs.state); + props->max_mtu = pvrdma_mtu_to_ib(resp->attrs.max_mtu); + props->active_mtu = pvrdma_mtu_to_ib(resp->attrs.active_mtu); + props->gid_tbl_len = resp->attrs.gid_tbl_len; + props->port_cap_flags = + pvrdma_port_cap_flags_to_ib(resp->attrs.port_cap_flags); + props->max_msg_sz = resp->attrs.max_msg_sz; + props->bad_pkey_cntr = resp->attrs.bad_pkey_cntr; + props->qkey_viol_cntr = resp->attrs.qkey_viol_cntr; + props->pkey_tbl_len = resp->attrs.pkey_tbl_len; + props->lid = resp->attrs.lid; + props->sm_lid = resp->attrs.sm_lid; + props->lmc = resp->attrs.lmc; + props->max_vl_num = resp->attrs.max_vl_num; + props->sm_sl = resp->attrs.sm_sl; + props->subnet_timeout = resp->attrs.subnet_timeout; + props->init_type_reply = resp->attrs.init_type_reply; + props->active_width = pvrdma_port_width_to_ib(resp->attrs.active_width); + props->active_speed = pvrdma_port_speed_to_ib(resp->attrs.active_speed); + props->phys_state = resp->attrs.phys_state; + + return 0; +} + +/** + * pvrdma_query_gid - query device gid + * @ibdev: the device to query + * @port: the port number + * @index: the index + * @gid: the device gid value + * + * @return: 0 on success, otherwise negative errno + */ +int pvrdma_query_gid(struct ib_device *ibdev, u8 port, int index, + union ib_gid *gid) +{ + struct pvrdma_dev *dev = to_vdev(ibdev); + + if (index >= dev->dsr->caps.gid_tbl_len) + return -EINVAL; + + memcpy(gid, &dev->sgid_tbl[index], sizeof(union ib_gid)); + + return 0; +} + +/** + * pvrdma_query_pkey - query device port's P_Key table + * @ibdev: the device to query + * @port: the port number + * @index: the index + * @pkey: the device P_Key value + * + * @return: 0 on success, otherwise negative errno + */ +int pvrdma_query_pkey(struct ib_device *ibdev, u8 port, u16 index, + u16 *pkey) +{ + int err = 0; + union pvrdma_cmd_req req; + union pvrdma_cmd_resp rsp; + struct pvrdma_cmd_query_pkey *cmd = &req.query_pkey; + + memset(cmd, 0, sizeof(*cmd)); + cmd->hdr.cmd = PVRDMA_CMD_QUERY_PKEY; + cmd->port_num = port; + cmd->index = index; + + err = pvrdma_cmd_post(to_vdev(ibdev), &req, &rsp, + PVRDMA_CMD_QUERY_PKEY_RESP); + if (err < 0) { + dev_warn(&to_vdev(ibdev)->pdev->dev, + "could not query pkey, error: %d\n", err); + return err; + } + + *pkey = rsp.query_pkey_resp.pkey; + + return 0; +} + +enum rdma_link_layer pvrdma_port_link_layer(struct ib_device *ibdev, + u8 port) +{ + return IB_LINK_LAYER_ETHERNET; +} + +int pvrdma_modify_device(struct ib_device *ibdev, int mask, + struct ib_device_modify *props) +{ + unsigned long flags; + + if (mask & ~(IB_DEVICE_MODIFY_SYS_IMAGE_GUID | + IB_DEVICE_MODIFY_NODE_DESC)) { + dev_warn(&to_vdev(ibdev)->pdev->dev, + "unsupported device modify mask %#x\n", mask); + return -EOPNOTSUPP; + } + + if (mask & IB_DEVICE_MODIFY_NODE_DESC) { + spin_lock_irqsave(&to_vdev(ibdev)->desc_lock, flags); + memcpy(ibdev->node_desc, props->node_desc, 64); + spin_unlock_irqrestore(&to_vdev(ibdev)->desc_lock, flags); + } + + if (mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID) { + mutex_lock(&to_vdev(ibdev)->port_mutex); + to_vdev(ibdev)->sys_image_guid = + cpu_to_be64(props->sys_image_guid); + mutex_unlock(&to_vdev(ibdev)->port_mutex); + } + + return 0; +} + +/** + * pvrdma_modify_port - modify device port attributes + * @ibdev: the device to modify + * @port: the port number + * @mask: attributes to modify + * @props: the device properties + * + * @return: 0 on success, otherwise negative errno + */ +int pvrdma_modify_port(struct ib_device *ibdev, u8 port, int mask, + struct ib_port_modify *props) +{ + struct ib_port_attr attr; + struct pvrdma_dev *vdev = to_vdev(ibdev); + int ret; + + if (mask & ~IB_PORT_SHUTDOWN) { + dev_warn(&vdev->pdev->dev, + "unsupported port modify mask %#x\n", mask); + return -EOPNOTSUPP; + } + + mutex_lock(&vdev->port_mutex); + ret = ib_query_port(ibdev, port, &attr); + if (ret) + goto out; + + vdev->port_cap_mask |= props->set_port_cap_mask; + vdev->port_cap_mask &= ~props->clr_port_cap_mask; + + if (mask & IB_PORT_SHUTDOWN) + vdev->ib_active = false; + +out: + mutex_unlock(&vdev->port_mutex); + return ret; +} + +/** + * pvrdma_alloc_ucontext - allocate ucontext + * @ibdev: the IB device + * @udata: user data + * + * @return: the ib_ucontext pointer on success, otherwise errno. + */ +struct ib_ucontext *pvrdma_alloc_ucontext(struct ib_device *ibdev, + struct ib_udata *udata) +{ + struct pvrdma_dev *vdev = to_vdev(ibdev); + struct pvrdma_ucontext *context; + union pvrdma_cmd_req req; + union pvrdma_cmd_resp rsp; + struct pvrdma_cmd_create_uc *cmd = &req.create_uc; + struct pvrdma_cmd_create_uc_resp *resp = &rsp.create_uc_resp; + struct pvrdma_alloc_ucontext_resp uresp = {0}; + int ret; + void *ptr; + + if (!vdev->ib_active) + return ERR_PTR(-EAGAIN); + + context = kmalloc(sizeof(*context), GFP_KERNEL); + if (!context) + return ERR_PTR(-ENOMEM); + + context->dev = vdev; + ret = pvrdma_uar_alloc(vdev, &context->uar); + if (ret) { + kfree(context); + return ERR_PTR(-ENOMEM); + } + + /* get ctx_handle from host */ + memset(cmd, 0, sizeof(*cmd)); + cmd->pfn = context->uar.pfn; + cmd->hdr.cmd = PVRDMA_CMD_CREATE_UC; + ret = pvrdma_cmd_post(vdev, &req, &rsp, PVRDMA_CMD_CREATE_UC_RESP); + if (ret < 0) { + dev_warn(&vdev->pdev->dev, + "could not create ucontext, error: %d\n", ret); + ptr = ERR_PTR(ret); + goto err; + } + + context->ctx_handle = resp->ctx_handle; + + /* copy back to user */ + uresp.qp_tab_size = vdev->dsr->caps.max_qp; + ret = ib_copy_to_udata(udata, &uresp, sizeof(uresp)); + if (ret) { + pvrdma_uar_free(vdev, &context->uar); + context->ibucontext.device = ibdev; + pvrdma_dealloc_ucontext(&context->ibucontext); + return ERR_PTR(-EFAULT); + } + + return &context->ibucontext; + +err: + pvrdma_uar_free(vdev, &context->uar); + kfree(context); + return ptr; +} + +/** + * pvrdma_dealloc_ucontext - deallocate ucontext + * @ibcontext: the ucontext + * + * @return: 0 on success, otherwise errno. + */ +int pvrdma_dealloc_ucontext(struct ib_ucontext *ibcontext) +{ + struct pvrdma_ucontext *context = to_vucontext(ibcontext); + union pvrdma_cmd_req req; + struct pvrdma_cmd_destroy_uc *cmd = &req.destroy_uc; + int ret; + + memset(cmd, 0, sizeof(*cmd)); + cmd->hdr.cmd = PVRDMA_CMD_DESTROY_UC; + cmd->ctx_handle = context->ctx_handle; + + ret = pvrdma_cmd_post(context->dev, &req, NULL, 0); + if (ret < 0) + dev_warn(&context->dev->pdev->dev, + "destroy ucontext failed, error: %d\n", ret); + + /* Free the UAR even if the device command failed */ + pvrdma_uar_free(to_vdev(ibcontext->device), &context->uar); + kfree(context); + + return ret; +} + +/** + * pvrdma_mmap - create mmap region + * @ibcontext: the user context + * @vma: the VMA + * + * @return: 0 on success, otherwise errno. + */ +int pvrdma_mmap(struct ib_ucontext *ibcontext, struct vm_area_struct *vma) +{ + struct pvrdma_ucontext *context = to_vucontext(ibcontext); + unsigned long start = vma->vm_start; + unsigned long size = vma->vm_end - vma->vm_start; + unsigned long offset = vma->vm_pgoff << PAGE_SHIFT; + + dev_dbg(&context->dev->pdev->dev, "create mmap region\n"); + + if ((size != PAGE_SIZE) || (offset & ~PAGE_MASK)) { + dev_warn(&context->dev->pdev->dev, + "invalid params for mmap region\n"); + return -EINVAL; + } + + /* Map UAR to kernel space, VM_LOCKED? */ + vma->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND; + vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); + if (io_remap_pfn_range(vma, start, context->uar.pfn, size, + vma->vm_page_prot)) + return -EAGAIN; + + return 0; +} + +/** + * pvrdma_alloc_pd - allocate protection domain + * @ibdev: the IB device + * @context: user context + * @udata: user data + * + * @return: the ib_pd protection domain pointer on success, otherwise errno. + */ +struct ib_pd *pvrdma_alloc_pd(struct ib_device *ibdev, + struct ib_ucontext *context, + struct ib_udata *udata) +{ + struct pvrdma_pd *pd; + struct pvrdma_dev *dev = to_vdev(ibdev); + union pvrdma_cmd_req req; + union pvrdma_cmd_resp rsp; + struct pvrdma_cmd_create_pd *cmd = &req.create_pd; + struct pvrdma_cmd_create_pd_resp *resp = &rsp.create_pd_resp; + int ret; + void *ptr; + + /* Check allowed max pds */ + if (!atomic_add_unless(&dev->num_pds, 1, dev->dsr->caps.max_pd)) + return ERR_PTR(-ENOMEM); + + pd = kmalloc(sizeof(*pd), GFP_KERNEL); + if (!pd) { + ptr = ERR_PTR(-ENOMEM); + goto err; + } + + memset(cmd, 0, sizeof(*cmd)); + cmd->hdr.cmd = PVRDMA_CMD_CREATE_PD; + cmd->ctx_handle = (context) ? to_vucontext(context)->ctx_handle : 0; + ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_CREATE_PD_RESP); + if (ret < 0) { + dev_warn(&dev->pdev->dev, + "failed to allocate protection domain, error: %d\n", + ret); + ptr = ERR_PTR(ret); + goto freepd; + } + + pd->privileged = !context; + pd->pd_handle = resp->pd_handle; + pd->pdn = resp->pd_handle; + + if (context) { + if (ib_copy_to_udata(udata, &pd->pdn, sizeof(__u32))) { + dev_warn(&dev->pdev->dev, + "failed to copy back protection domain\n"); + pvrdma_dealloc_pd(&pd->ibpd); + return ERR_PTR(-EFAULT); + } + } + + /* u32 pd handle */ + return &pd->ibpd; + +freepd: + kfree(pd); +err: + atomic_dec(&dev->num_pds); + return ptr; +} + +/** + * pvrdma_dealloc_pd - deallocate protection domain + * @pd: the protection domain to be released + * + * @return: 0 on success, otherwise errno. + */ +int pvrdma_dealloc_pd(struct ib_pd *pd) +{ + struct pvrdma_dev *dev = to_vdev(pd->device); + union pvrdma_cmd_req req; + struct pvrdma_cmd_destroy_pd *cmd = &req.destroy_pd; + int ret; + + memset(cmd, 0, sizeof(*cmd)); + cmd->hdr.cmd = PVRDMA_CMD_DESTROY_PD; + cmd->pd_handle = to_vpd(pd)->pd_handle; + + ret = pvrdma_cmd_post(dev, &req, NULL, 0); + if (ret) + dev_warn(&dev->pdev->dev, + "could not dealloc protection domain, error: %d\n", + ret); + + kfree(to_vpd(pd)); + atomic_dec(&dev->num_pds); + + return 0; +} + +/** + * pvrdma_create_ah - create an address handle + * @pd: the protection domain + * @ah_attr: the attributes of the AH + * @udata: user data blob + * + * @return: the ib_ah pointer on success, otherwise errno. + */ +struct ib_ah *pvrdma_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr, + struct ib_udata *udata) +{ + struct pvrdma_dev *dev = to_vdev(pd->device); + struct pvrdma_ah *ah; + enum rdma_link_layer ll; + + if (!(ah_attr->ah_flags & IB_AH_GRH)) + return ERR_PTR(-EINVAL); + + ll = rdma_port_get_link_layer(pd->device, ah_attr->port_num); + + if (ll != IB_LINK_LAYER_ETHERNET || + rdma_is_multicast_addr((struct in6_addr *)ah_attr->grh.dgid.raw)) + return ERR_PTR(-EINVAL); + + if (!atomic_add_unless(&dev->num_ahs, 1, dev->dsr->caps.max_ah)) + return ERR_PTR(-ENOMEM); + + ah = kzalloc(sizeof(*ah), GFP_KERNEL); + if (!ah) { + atomic_dec(&dev->num_ahs); + return ERR_PTR(-ENOMEM); + } + + ah->av.port_pd = to_vpd(pd)->pd_handle | (ah_attr->port_num << 24); + ah->av.src_path_bits = ah_attr->src_path_bits; + ah->av.src_path_bits |= 0x80; + ah->av.gid_index = ah_attr->grh.sgid_index; + ah->av.hop_limit = ah_attr->grh.hop_limit; + ah->av.sl_tclass_flowlabel = (ah_attr->grh.traffic_class << 20) | + ah_attr->grh.flow_label; + memcpy(ah->av.dgid, ah_attr->grh.dgid.raw, 16); + memcpy(ah->av.dmac, ah_attr->dmac, 6); + + ah->ibah.device = pd->device; + ah->ibah.pd = pd; + ah->ibah.uobject = NULL; + + return &ah->ibah; +} + +/** + * pvrdma_destroy_ah - destroy an address handle + * @ah: the address handle to destroyed + * + * @return: 0 on success. + */ +int pvrdma_destroy_ah(struct ib_ah *ah) +{ + struct pvrdma_dev *dev = to_vdev(ah->device); + + kfree(to_vah(ah)); + atomic_dec(&dev->num_ahs); + + return 0; +} |