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kernel_samsung_a34x-permissive/drivers/infiniband/hw/bnxt_re/ib_verbs.c

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Import A346BXXU1AWB9 kernel source Android 13
2024-04-28 06:49:01 -07:00
/*
* Broadcom NetXtreme-E RoCE driver.
*
* Copyright (c) 2016 - 2017, Broadcom. All rights reserved. The term
* Broadcom refers to Broadcom Limited and/or its subsidiaries.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* BSD license below:
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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 AUTHOR 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 AUTHOR 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.
*
* Description: IB Verbs interpreter
*/
#include <linux/interrupt.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/netdevice.h>
#include <linux/if_ether.h>
#include <rdma/ib_verbs.h>
#include <rdma/ib_user_verbs.h>
#include <rdma/ib_umem.h>
#include <rdma/ib_addr.h>
#include <rdma/ib_mad.h>
#include <rdma/ib_cache.h>
#include "bnxt_ulp.h"
#include "roce_hsi.h"
#include "qplib_res.h"
#include "qplib_sp.h"
#include "qplib_fp.h"
#include "qplib_rcfw.h"
#include "bnxt_re.h"
#include "ib_verbs.h"
#include <rdma/bnxt_re-abi.h>
static int __from_ib_access_flags(int iflags)
{
int qflags = 0;
if (iflags & IB_ACCESS_LOCAL_WRITE)
qflags |= BNXT_QPLIB_ACCESS_LOCAL_WRITE;
if (iflags & IB_ACCESS_REMOTE_READ)
qflags |= BNXT_QPLIB_ACCESS_REMOTE_READ;
if (iflags & IB_ACCESS_REMOTE_WRITE)
qflags |= BNXT_QPLIB_ACCESS_REMOTE_WRITE;
if (iflags & IB_ACCESS_REMOTE_ATOMIC)
qflags |= BNXT_QPLIB_ACCESS_REMOTE_ATOMIC;
if (iflags & IB_ACCESS_MW_BIND)
qflags |= BNXT_QPLIB_ACCESS_MW_BIND;
if (iflags & IB_ZERO_BASED)
qflags |= BNXT_QPLIB_ACCESS_ZERO_BASED;
if (iflags & IB_ACCESS_ON_DEMAND)
qflags |= BNXT_QPLIB_ACCESS_ON_DEMAND;
return qflags;
};
static enum ib_access_flags __to_ib_access_flags(int qflags)
{
enum ib_access_flags iflags = 0;
if (qflags & BNXT_QPLIB_ACCESS_LOCAL_WRITE)
iflags |= IB_ACCESS_LOCAL_WRITE;
if (qflags & BNXT_QPLIB_ACCESS_REMOTE_WRITE)
iflags |= IB_ACCESS_REMOTE_WRITE;
if (qflags & BNXT_QPLIB_ACCESS_REMOTE_READ)
iflags |= IB_ACCESS_REMOTE_READ;
if (qflags & BNXT_QPLIB_ACCESS_REMOTE_ATOMIC)
iflags |= IB_ACCESS_REMOTE_ATOMIC;
if (qflags & BNXT_QPLIB_ACCESS_MW_BIND)
iflags |= IB_ACCESS_MW_BIND;
if (qflags & BNXT_QPLIB_ACCESS_ZERO_BASED)
iflags |= IB_ZERO_BASED;
if (qflags & BNXT_QPLIB_ACCESS_ON_DEMAND)
iflags |= IB_ACCESS_ON_DEMAND;
return iflags;
};
static int bnxt_re_build_sgl(struct ib_sge *ib_sg_list,
struct bnxt_qplib_sge *sg_list, int num)
{
int i, total = 0;
for (i = 0; i < num; i++) {
sg_list[i].addr = ib_sg_list[i].addr;
sg_list[i].lkey = ib_sg_list[i].lkey;
sg_list[i].size = ib_sg_list[i].length;
total += sg_list[i].size;
}
return total;
}
/* Device */
struct net_device *bnxt_re_get_netdev(struct ib_device *ibdev, u8 port_num)
{
struct bnxt_re_dev *rdev = to_bnxt_re_dev(ibdev, ibdev);
struct net_device *netdev = NULL;
rcu_read_lock();
if (rdev)
netdev = rdev->netdev;
if (netdev)
dev_hold(netdev);
rcu_read_unlock();
return netdev;
}
int bnxt_re_query_device(struct ib_device *ibdev,
struct ib_device_attr *ib_attr,
struct ib_udata *udata)
{
struct bnxt_re_dev *rdev = to_bnxt_re_dev(ibdev, ibdev);
struct bnxt_qplib_dev_attr *dev_attr = &rdev->dev_attr;
memset(ib_attr, 0, sizeof(*ib_attr));
memcpy(&ib_attr->fw_ver, dev_attr->fw_ver,
min(sizeof(dev_attr->fw_ver),
sizeof(ib_attr->fw_ver)));
bnxt_qplib_get_guid(rdev->netdev->dev_addr,
(u8 *)&ib_attr->sys_image_guid);
ib_attr->max_mr_size = BNXT_RE_MAX_MR_SIZE;
ib_attr->page_size_cap = BNXT_RE_PAGE_SIZE_4K | BNXT_RE_PAGE_SIZE_2M;
ib_attr->vendor_id = rdev->en_dev->pdev->vendor;
ib_attr->vendor_part_id = rdev->en_dev->pdev->device;
ib_attr->hw_ver = rdev->en_dev->pdev->subsystem_device;
ib_attr->max_qp = dev_attr->max_qp;
ib_attr->max_qp_wr = dev_attr->max_qp_wqes;
ib_attr->device_cap_flags =
IB_DEVICE_CURR_QP_STATE_MOD
| IB_DEVICE_RC_RNR_NAK_GEN
| IB_DEVICE_SHUTDOWN_PORT
| IB_DEVICE_SYS_IMAGE_GUID
| IB_DEVICE_LOCAL_DMA_LKEY
| IB_DEVICE_RESIZE_MAX_WR
| IB_DEVICE_PORT_ACTIVE_EVENT
| IB_DEVICE_N_NOTIFY_CQ
| IB_DEVICE_MEM_WINDOW
| IB_DEVICE_MEM_WINDOW_TYPE_2B
| IB_DEVICE_MEM_MGT_EXTENSIONS;
ib_attr->max_send_sge = dev_attr->max_qp_sges;
ib_attr->max_recv_sge = dev_attr->max_qp_sges;
ib_attr->max_sge_rd = dev_attr->max_qp_sges;
ib_attr->max_cq = dev_attr->max_cq;
ib_attr->max_cqe = dev_attr->max_cq_wqes;
ib_attr->max_mr = dev_attr->max_mr;
ib_attr->max_pd = dev_attr->max_pd;
ib_attr->max_qp_rd_atom = dev_attr->max_qp_rd_atom;
ib_attr->max_qp_init_rd_atom = dev_attr->max_qp_init_rd_atom;
ib_attr->atomic_cap = IB_ATOMIC_NONE;
ib_attr->masked_atomic_cap = IB_ATOMIC_NONE;
ib_attr->max_ee_rd_atom = 0;
ib_attr->max_res_rd_atom = 0;
ib_attr->max_ee_init_rd_atom = 0;
ib_attr->max_ee = 0;
ib_attr->max_rdd = 0;
ib_attr->max_mw = dev_attr->max_mw;
ib_attr->max_raw_ipv6_qp = 0;
ib_attr->max_raw_ethy_qp = dev_attr->max_raw_ethy_qp;
ib_attr->max_mcast_grp = 0;
ib_attr->max_mcast_qp_attach = 0;
ib_attr->max_total_mcast_qp_attach = 0;
ib_attr->max_ah = dev_attr->max_ah;
ib_attr->max_fmr = 0;
ib_attr->max_map_per_fmr = 0;
ib_attr->max_srq = dev_attr->max_srq;
ib_attr->max_srq_wr = dev_attr->max_srq_wqes;
ib_attr->max_srq_sge = dev_attr->max_srq_sges;
ib_attr->max_fast_reg_page_list_len = MAX_PBL_LVL_1_PGS;
ib_attr->max_pkeys = 1;
ib_attr->local_ca_ack_delay = BNXT_RE_DEFAULT_ACK_DELAY;
return 0;
}
int bnxt_re_modify_device(struct ib_device *ibdev,
int device_modify_mask,
struct ib_device_modify *device_modify)
{
switch (device_modify_mask) {
case IB_DEVICE_MODIFY_SYS_IMAGE_GUID:
/* Modify the GUID requires the modification of the GID table */
/* GUID should be made as READ-ONLY */
break;
case IB_DEVICE_MODIFY_NODE_DESC:
/* Node Desc should be made as READ-ONLY */
break;
default:
break;
}
return 0;
}
/* Port */
int bnxt_re_query_port(struct ib_device *ibdev, u8 port_num,
struct ib_port_attr *port_attr)
{
struct bnxt_re_dev *rdev = to_bnxt_re_dev(ibdev, ibdev);
struct bnxt_qplib_dev_attr *dev_attr = &rdev->dev_attr;
memset(port_attr, 0, sizeof(*port_attr));
if (netif_running(rdev->netdev) && netif_carrier_ok(rdev->netdev)) {
port_attr->state = IB_PORT_ACTIVE;
port_attr->phys_state = 5;
} else {
port_attr->state = IB_PORT_DOWN;
port_attr->phys_state = 3;
}
port_attr->max_mtu = IB_MTU_4096;
port_attr->active_mtu = iboe_get_mtu(rdev->netdev->mtu);
port_attr->gid_tbl_len = dev_attr->max_sgid;
port_attr->port_cap_flags = IB_PORT_CM_SUP | IB_PORT_REINIT_SUP |
IB_PORT_DEVICE_MGMT_SUP |
IB_PORT_VENDOR_CLASS_SUP;
port_attr->ip_gids = true;
port_attr->max_msg_sz = (u32)BNXT_RE_MAX_MR_SIZE_LOW;
port_attr->bad_pkey_cntr = 0;
port_attr->qkey_viol_cntr = 0;
port_attr->pkey_tbl_len = dev_attr->max_pkey;
port_attr->lid = 0;
port_attr->sm_lid = 0;
port_attr->lmc = 0;
port_attr->max_vl_num = 4;
port_attr->sm_sl = 0;
port_attr->subnet_timeout = 0;
port_attr->init_type_reply = 0;
port_attr->active_speed = rdev->active_speed;
port_attr->active_width = rdev->active_width;
return 0;
}
int bnxt_re_get_port_immutable(struct ib_device *ibdev, u8 port_num,
struct ib_port_immutable *immutable)
{
struct ib_port_attr port_attr;
if (bnxt_re_query_port(ibdev, port_num, &port_attr))
return -EINVAL;
immutable->pkey_tbl_len = port_attr.pkey_tbl_len;
immutable->gid_tbl_len = port_attr.gid_tbl_len;
immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE;
immutable->core_cap_flags |= RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP;
immutable->max_mad_size = IB_MGMT_MAD_SIZE;
return 0;
}
void bnxt_re_query_fw_str(struct ib_device *ibdev, char *str)
{
struct bnxt_re_dev *rdev = to_bnxt_re_dev(ibdev, ibdev);
snprintf(str, IB_FW_VERSION_NAME_MAX, "%d.%d.%d.%d",
rdev->dev_attr.fw_ver[0], rdev->dev_attr.fw_ver[1],
rdev->dev_attr.fw_ver[2], rdev->dev_attr.fw_ver[3]);
}
int bnxt_re_query_pkey(struct ib_device *ibdev, u8 port_num,
u16 index, u16 *pkey)
{
struct bnxt_re_dev *rdev = to_bnxt_re_dev(ibdev, ibdev);
/* Ignore port_num */
memset(pkey, 0, sizeof(*pkey));
return bnxt_qplib_get_pkey(&rdev->qplib_res,
&rdev->qplib_res.pkey_tbl, index, pkey);
}
int bnxt_re_query_gid(struct ib_device *ibdev, u8 port_num,
int index, union ib_gid *gid)
{
struct bnxt_re_dev *rdev = to_bnxt_re_dev(ibdev, ibdev);
int rc = 0;
/* Ignore port_num */
memset(gid, 0, sizeof(*gid));
rc = bnxt_qplib_get_sgid(&rdev->qplib_res,
&rdev->qplib_res.sgid_tbl, index,
(struct bnxt_qplib_gid *)gid);
return rc;
}
int bnxt_re_del_gid(const struct ib_gid_attr *attr, void **context)
{
int rc = 0;
struct bnxt_re_gid_ctx *ctx, **ctx_tbl;
struct bnxt_re_dev *rdev = to_bnxt_re_dev(attr->device, ibdev);
struct bnxt_qplib_sgid_tbl *sgid_tbl = &rdev->qplib_res.sgid_tbl;
struct bnxt_qplib_gid *gid_to_del;
/* Delete the entry from the hardware */
ctx = *context;
if (!ctx)
return -EINVAL;
if (sgid_tbl && sgid_tbl->active) {
if (ctx->idx >= sgid_tbl->max)
return -EINVAL;
gid_to_del = &sgid_tbl->tbl[ctx->idx];
/* DEL_GID is called in WQ context(netdevice_event_work_handler)
* or via the ib_unregister_device path. In the former case QP1
* may not be destroyed yet, in which case just return as FW
* needs that entry to be present and will fail it's deletion.
* We could get invoked again after QP1 is destroyed OR get an
* ADD_GID call with a different GID value for the same index
* where we issue MODIFY_GID cmd to update the GID entry -- TBD
*/
if (ctx->idx == 0 &&
rdma_link_local_addr((struct in6_addr *)gid_to_del) &&
ctx->refcnt == 1 && rdev->qp1_sqp) {
dev_dbg(rdev_to_dev(rdev),
"Trying to delete GID0 while QP1 is alive\n");
return -EFAULT;
}
ctx->refcnt--;
if (!ctx->refcnt) {
rc = bnxt_qplib_del_sgid(sgid_tbl, gid_to_del, true);
if (rc) {
dev_err(rdev_to_dev(rdev),
"Failed to remove GID: %#x", rc);
} else {
ctx_tbl = sgid_tbl->ctx;
ctx_tbl[ctx->idx] = NULL;
kfree(ctx);
}
}
} else {
return -EINVAL;
}
return rc;
}
int bnxt_re_add_gid(const struct ib_gid_attr *attr, void **context)
{
int rc;
u32 tbl_idx = 0;
u16 vlan_id = 0xFFFF;
struct bnxt_re_gid_ctx *ctx, **ctx_tbl;
struct bnxt_re_dev *rdev = to_bnxt_re_dev(attr->device, ibdev);
struct bnxt_qplib_sgid_tbl *sgid_tbl = &rdev->qplib_res.sgid_tbl;
if ((attr->ndev) && is_vlan_dev(attr->ndev))
vlan_id = vlan_dev_vlan_id(attr->ndev);
rc = bnxt_qplib_add_sgid(sgid_tbl, (struct bnxt_qplib_gid *)&attr->gid,
rdev->qplib_res.netdev->dev_addr,
vlan_id, true, &tbl_idx);
if (rc == -EALREADY) {
ctx_tbl = sgid_tbl->ctx;
ctx_tbl[tbl_idx]->refcnt++;
*context = ctx_tbl[tbl_idx];
return 0;
}
if (rc < 0) {
dev_err(rdev_to_dev(rdev), "Failed to add GID: %#x", rc);
return rc;
}
ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
ctx_tbl = sgid_tbl->ctx;
ctx->idx = tbl_idx;
ctx->refcnt = 1;
ctx_tbl[tbl_idx] = ctx;
*context = ctx;
return rc;
}
enum rdma_link_layer bnxt_re_get_link_layer(struct ib_device *ibdev,
u8 port_num)
{
return IB_LINK_LAYER_ETHERNET;
}
#define BNXT_RE_FENCE_PBL_SIZE DIV_ROUND_UP(BNXT_RE_FENCE_BYTES, PAGE_SIZE)
static void bnxt_re_create_fence_wqe(struct bnxt_re_pd *pd)
{
struct bnxt_re_fence_data *fence = &pd->fence;
struct ib_mr *ib_mr = &fence->mr->ib_mr;
struct bnxt_qplib_swqe *wqe = &fence->bind_wqe;
memset(wqe, 0, sizeof(*wqe));
wqe->type = BNXT_QPLIB_SWQE_TYPE_BIND_MW;
wqe->wr_id = BNXT_QPLIB_FENCE_WRID;
wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SIGNAL_COMP;
wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_UC_FENCE;
wqe->bind.zero_based = false;
wqe->bind.parent_l_key = ib_mr->lkey;
wqe->bind.va = (u64)(unsigned long)fence->va;
wqe->bind.length = fence->size;
wqe->bind.access_cntl = __from_ib_access_flags(IB_ACCESS_REMOTE_READ);
wqe->bind.mw_type = SQ_BIND_MW_TYPE_TYPE1;
/* Save the initial rkey in fence structure for now;
* wqe->bind.r_key will be set at (re)bind time.
*/
fence->bind_rkey = ib_inc_rkey(fence->mw->rkey);
}
static int bnxt_re_bind_fence_mw(struct bnxt_qplib_qp *qplib_qp)
{
struct bnxt_re_qp *qp = container_of(qplib_qp, struct bnxt_re_qp,
qplib_qp);
struct ib_pd *ib_pd = qp->ib_qp.pd;
struct bnxt_re_pd *pd = container_of(ib_pd, struct bnxt_re_pd, ib_pd);
struct bnxt_re_fence_data *fence = &pd->fence;
struct bnxt_qplib_swqe *fence_wqe = &fence->bind_wqe;
struct bnxt_qplib_swqe wqe;
int rc;
memcpy(&wqe, fence_wqe, sizeof(wqe));
wqe.bind.r_key = fence->bind_rkey;
fence->bind_rkey = ib_inc_rkey(fence->bind_rkey);
dev_dbg(rdev_to_dev(qp->rdev),
"Posting bind fence-WQE: rkey: %#x QP: %d PD: %p\n",
wqe.bind.r_key, qp->qplib_qp.id, pd);
rc = bnxt_qplib_post_send(&qp->qplib_qp, &wqe);
if (rc) {
dev_err(rdev_to_dev(qp->rdev), "Failed to bind fence-WQE\n");
return rc;
}
bnxt_qplib_post_send_db(&qp->qplib_qp);
return rc;
}
static void bnxt_re_destroy_fence_mr(struct bnxt_re_pd *pd)
{
struct bnxt_re_fence_data *fence = &pd->fence;
struct bnxt_re_dev *rdev = pd->rdev;
struct device *dev = &rdev->en_dev->pdev->dev;
struct bnxt_re_mr *mr = fence->mr;
if (fence->mw) {
bnxt_re_dealloc_mw(fence->mw);
fence->mw = NULL;
}
if (mr) {
if (mr->ib_mr.rkey)
bnxt_qplib_dereg_mrw(&rdev->qplib_res, &mr->qplib_mr,
true);
if (mr->ib_mr.lkey)
bnxt_qplib_free_mrw(&rdev->qplib_res, &mr->qplib_mr);
kfree(mr);
fence->mr = NULL;
}
if (fence->dma_addr) {
dma_unmap_single(dev, fence->dma_addr, BNXT_RE_FENCE_BYTES,
DMA_BIDIRECTIONAL);
fence->dma_addr = 0;
}
}
static int bnxt_re_create_fence_mr(struct bnxt_re_pd *pd)
{
int mr_access_flags = IB_ACCESS_LOCAL_WRITE | IB_ACCESS_MW_BIND;
struct bnxt_re_fence_data *fence = &pd->fence;
struct bnxt_re_dev *rdev = pd->rdev;
struct device *dev = &rdev->en_dev->pdev->dev;
struct bnxt_re_mr *mr = NULL;
dma_addr_t dma_addr = 0;
struct ib_mw *mw;
u64 pbl_tbl;
int rc;
dma_addr = dma_map_single(dev, fence->va, BNXT_RE_FENCE_BYTES,
DMA_BIDIRECTIONAL);
rc = dma_mapping_error(dev, dma_addr);
if (rc) {
dev_err(rdev_to_dev(rdev), "Failed to dma-map fence-MR-mem\n");
rc = -EIO;
fence->dma_addr = 0;
goto fail;
}
fence->dma_addr = dma_addr;
/* Allocate a MR */
mr = kzalloc(sizeof(*mr), GFP_KERNEL);
if (!mr) {
rc = -ENOMEM;
goto fail;
}
fence->mr = mr;
mr->rdev = rdev;
mr->qplib_mr.pd = &pd->qplib_pd;
mr->qplib_mr.type = CMDQ_ALLOCATE_MRW_MRW_FLAGS_PMR;
mr->qplib_mr.flags = __from_ib_access_flags(mr_access_flags);
rc = bnxt_qplib_alloc_mrw(&rdev->qplib_res, &mr->qplib_mr);
if (rc) {
dev_err(rdev_to_dev(rdev), "Failed to alloc fence-HW-MR\n");
goto fail;
}
/* Register MR */
mr->ib_mr.lkey = mr->qplib_mr.lkey;
mr->qplib_mr.va = (u64)(unsigned long)fence->va;
mr->qplib_mr.total_size = BNXT_RE_FENCE_BYTES;
pbl_tbl = dma_addr;
rc = bnxt_qplib_reg_mr(&rdev->qplib_res, &mr->qplib_mr, &pbl_tbl,
BNXT_RE_FENCE_PBL_SIZE, false, PAGE_SIZE);
if (rc) {
dev_err(rdev_to_dev(rdev), "Failed to register fence-MR\n");
goto fail;
}
mr->ib_mr.rkey = mr->qplib_mr.rkey;
/* Create a fence MW only for kernel consumers */
mw = bnxt_re_alloc_mw(&pd->ib_pd, IB_MW_TYPE_1, NULL);
if (IS_ERR(mw)) {
dev_err(rdev_to_dev(rdev),
"Failed to create fence-MW for PD: %p\n", pd);
rc = PTR_ERR(mw);
goto fail;
}
fence->mw = mw;
bnxt_re_create_fence_wqe(pd);
return 0;
fail:
bnxt_re_destroy_fence_mr(pd);
return rc;
}
/* Protection Domains */
int bnxt_re_dealloc_pd(struct ib_pd *ib_pd)
{
struct bnxt_re_pd *pd = container_of(ib_pd, struct bnxt_re_pd, ib_pd);
struct bnxt_re_dev *rdev = pd->rdev;
int rc;
bnxt_re_destroy_fence_mr(pd);
if (pd->qplib_pd.id) {
rc = bnxt_qplib_dealloc_pd(&rdev->qplib_res,
&rdev->qplib_res.pd_tbl,
&pd->qplib_pd);
if (rc)
dev_err(rdev_to_dev(rdev), "Failed to deallocate HW PD");
}
kfree(pd);
return 0;
}
struct ib_pd *bnxt_re_alloc_pd(struct ib_device *ibdev,
struct ib_ucontext *ucontext,
struct ib_udata *udata)
{
struct bnxt_re_dev *rdev = to_bnxt_re_dev(ibdev, ibdev);
struct bnxt_re_ucontext *ucntx = container_of(ucontext,
struct bnxt_re_ucontext,
ib_uctx);
struct bnxt_re_pd *pd;
int rc;
pd = kzalloc(sizeof(*pd), GFP_KERNEL);
if (!pd)
return ERR_PTR(-ENOMEM);
pd->rdev = rdev;
if (bnxt_qplib_alloc_pd(&rdev->qplib_res.pd_tbl, &pd->qplib_pd)) {
dev_err(rdev_to_dev(rdev), "Failed to allocate HW PD");
rc = -ENOMEM;
goto fail;
}
if (udata) {
struct bnxt_re_pd_resp resp;
if (!ucntx->dpi.dbr) {
/* Allocate DPI in alloc_pd to avoid failing of
* ibv_devinfo and family of application when DPIs
* are depleted.
*/
if (bnxt_qplib_alloc_dpi(&rdev->qplib_res.dpi_tbl,
&ucntx->dpi, ucntx)) {
rc = -ENOMEM;
goto dbfail;
}
}
resp.pdid = pd->qplib_pd.id;
/* Still allow mapping this DBR to the new user PD. */
resp.dpi = ucntx->dpi.dpi;
resp.dbr = (u64)ucntx->dpi.umdbr;
rc = ib_copy_to_udata(udata, &resp, sizeof(resp));
if (rc) {
dev_err(rdev_to_dev(rdev),
"Failed to copy user response\n");
goto dbfail;
}
}
if (!udata)
if (bnxt_re_create_fence_mr(pd))
dev_warn(rdev_to_dev(rdev),
"Failed to create Fence-MR\n");
return &pd->ib_pd;
dbfail:
(void)bnxt_qplib_dealloc_pd(&rdev->qplib_res, &rdev->qplib_res.pd_tbl,
&pd->qplib_pd);
fail:
kfree(pd);
return ERR_PTR(rc);
}
/* Address Handles */
int bnxt_re_destroy_ah(struct ib_ah *ib_ah)
{
struct bnxt_re_ah *ah = container_of(ib_ah, struct bnxt_re_ah, ib_ah);
struct bnxt_re_dev *rdev = ah->rdev;
int rc;
rc = bnxt_qplib_destroy_ah(&rdev->qplib_res, &ah->qplib_ah);
if (rc) {
dev_err(rdev_to_dev(rdev), "Failed to destroy HW AH");
return rc;
}
kfree(ah);
return 0;
}
struct ib_ah *bnxt_re_create_ah(struct ib_pd *ib_pd,
struct rdma_ah_attr *ah_attr,
struct ib_udata *udata)
{
struct bnxt_re_pd *pd = container_of(ib_pd, struct bnxt_re_pd, ib_pd);
struct bnxt_re_dev *rdev = pd->rdev;
struct bnxt_re_ah *ah;
const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr);
int rc;
u8 nw_type;
if (!(rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH)) {
dev_err(rdev_to_dev(rdev), "Failed to alloc AH: GRH not set");
return ERR_PTR(-EINVAL);
}
ah = kzalloc(sizeof(*ah), GFP_ATOMIC);
if (!ah)
return ERR_PTR(-ENOMEM);
ah->rdev = rdev;
ah->qplib_ah.pd = &pd->qplib_pd;
/* Supply the configuration for the HW */
memcpy(ah->qplib_ah.dgid.data, grh->dgid.raw,
sizeof(union ib_gid));
/*
* If RoCE V2 is enabled, stack will have two entries for
* each GID entry. Avoiding this duplicte entry in HW. Dividing
* the GID index by 2 for RoCE V2
*/
ah->qplib_ah.sgid_index = grh->sgid_index / 2;
ah->qplib_ah.host_sgid_index = grh->sgid_index;
ah->qplib_ah.traffic_class = grh->traffic_class;
ah->qplib_ah.flow_label = grh->flow_label;
ah->qplib_ah.hop_limit = grh->hop_limit;
ah->qplib_ah.sl = rdma_ah_get_sl(ah_attr);
if (ib_pd->uobject &&
!rdma_is_multicast_addr((struct in6_addr *)
grh->dgid.raw) &&
!rdma_link_local_addr((struct in6_addr *)
grh->dgid.raw)) {
const struct ib_gid_attr *sgid_attr;
sgid_attr = grh->sgid_attr;
/* Get network header type for this GID */
nw_type = rdma_gid_attr_network_type(sgid_attr);
switch (nw_type) {
case RDMA_NETWORK_IPV4:
ah->qplib_ah.nw_type = CMDQ_CREATE_AH_TYPE_V2IPV4;
break;
case RDMA_NETWORK_IPV6:
ah->qplib_ah.nw_type = CMDQ_CREATE_AH_TYPE_V2IPV6;
break;
default:
ah->qplib_ah.nw_type = CMDQ_CREATE_AH_TYPE_V1;
break;
}
}
memcpy(ah->qplib_ah.dmac, ah_attr->roce.dmac, ETH_ALEN);
rc = bnxt_qplib_create_ah(&rdev->qplib_res, &ah->qplib_ah);
if (rc) {
dev_err(rdev_to_dev(rdev), "Failed to allocate HW AH");
goto fail;
}
/* Write AVID to shared page. */
if (ib_pd->uobject) {
struct ib_ucontext *ib_uctx = ib_pd->uobject->context;
struct bnxt_re_ucontext *uctx;
unsigned long flag;
u32 *wrptr;
uctx = container_of(ib_uctx, struct bnxt_re_ucontext, ib_uctx);
spin_lock_irqsave(&uctx->sh_lock, flag);
wrptr = (u32 *)(uctx->shpg + BNXT_RE_AVID_OFFT);
*wrptr = ah->qplib_ah.id;
wmb(); /* make sure cache is updated. */
spin_unlock_irqrestore(&uctx->sh_lock, flag);
}
return &ah->ib_ah;
fail:
kfree(ah);
return ERR_PTR(rc);
}
int bnxt_re_modify_ah(struct ib_ah *ib_ah, struct rdma_ah_attr *ah_attr)
{
return 0;
}
int bnxt_re_query_ah(struct ib_ah *ib_ah, struct rdma_ah_attr *ah_attr)
{
struct bnxt_re_ah *ah = container_of(ib_ah, struct bnxt_re_ah, ib_ah);
ah_attr->type = ib_ah->type;
rdma_ah_set_sl(ah_attr, ah->qplib_ah.sl);
memcpy(ah_attr->roce.dmac, ah->qplib_ah.dmac, ETH_ALEN);
rdma_ah_set_grh(ah_attr, NULL, 0,
ah->qplib_ah.host_sgid_index,
0, ah->qplib_ah.traffic_class);
rdma_ah_set_dgid_raw(ah_attr, ah->qplib_ah.dgid.data);
rdma_ah_set_port_num(ah_attr, 1);
rdma_ah_set_static_rate(ah_attr, 0);
return 0;
}
unsigned long bnxt_re_lock_cqs(struct bnxt_re_qp *qp)
__acquires(&qp->scq->cq_lock) __acquires(&qp->rcq->cq_lock)
{
unsigned long flags;
spin_lock_irqsave(&qp->scq->cq_lock, flags);
if (qp->rcq != qp->scq)
spin_lock(&qp->rcq->cq_lock);
else
__acquire(&qp->rcq->cq_lock);
return flags;
}
void bnxt_re_unlock_cqs(struct bnxt_re_qp *qp,
unsigned long flags)
__releases(&qp->scq->cq_lock) __releases(&qp->rcq->cq_lock)
{
if (qp->rcq != qp->scq)
spin_unlock(&qp->rcq->cq_lock);
else
__release(&qp->rcq->cq_lock);
spin_unlock_irqrestore(&qp->scq->cq_lock, flags);
}
/* Queue Pairs */
int bnxt_re_destroy_qp(struct ib_qp *ib_qp)
{
struct bnxt_re_qp *qp = container_of(ib_qp, struct bnxt_re_qp, ib_qp);
struct bnxt_re_dev *rdev = qp->rdev;
int rc;
unsigned int flags;
bnxt_qplib_flush_cqn_wq(&qp->qplib_qp);
rc = bnxt_qplib_destroy_qp(&rdev->qplib_res, &qp->qplib_qp);
if (rc) {
dev_err(rdev_to_dev(rdev), "Failed to destroy HW QP");
return rc;
}
flags = bnxt_re_lock_cqs(qp);
bnxt_qplib_clean_qp(&qp->qplib_qp);
bnxt_re_unlock_cqs(qp, flags);
bnxt_qplib_free_qp_res(&rdev->qplib_res, &qp->qplib_qp);
if (ib_qp->qp_type == IB_QPT_GSI && rdev->qp1_sqp) {
rc = bnxt_qplib_destroy_ah(&rdev->qplib_res,
&rdev->sqp_ah->qplib_ah);
if (rc) {
dev_err(rdev_to_dev(rdev),
"Failed to destroy HW AH for shadow QP");
return rc;
}
bnxt_qplib_clean_qp(&qp->qplib_qp);
rc = bnxt_qplib_destroy_qp(&rdev->qplib_res,
&rdev->qp1_sqp->qplib_qp);
if (rc) {
dev_err(rdev_to_dev(rdev),
"Failed to destroy Shadow QP");
return rc;
}
bnxt_qplib_free_qp_res(&rdev->qplib_res,
&rdev->qp1_sqp->qplib_qp);
mutex_lock(&rdev->qp_lock);
list_del(&rdev->qp1_sqp->list);
atomic_dec(&rdev->qp_count);
mutex_unlock(&rdev->qp_lock);
kfree(rdev->sqp_ah);
kfree(rdev->qp1_sqp);
rdev->qp1_sqp = NULL;
rdev->sqp_ah = NULL;
}
if (!IS_ERR_OR_NULL(qp->rumem))
ib_umem_release(qp->rumem);
if (!IS_ERR_OR_NULL(qp->sumem))
ib_umem_release(qp->sumem);
mutex_lock(&rdev->qp_lock);
list_del(&qp->list);
atomic_dec(&rdev->qp_count);
mutex_unlock(&rdev->qp_lock);
kfree(qp);
return 0;
}
static u8 __from_ib_qp_type(enum ib_qp_type type)
{
switch (type) {
case IB_QPT_GSI:
return CMDQ_CREATE_QP1_TYPE_GSI;
case IB_QPT_RC:
return CMDQ_CREATE_QP_TYPE_RC;
case IB_QPT_UD:
return CMDQ_CREATE_QP_TYPE_UD;
default:
return IB_QPT_MAX;
}
}
static int bnxt_re_init_user_qp(struct bnxt_re_dev *rdev, struct bnxt_re_pd *pd,
struct bnxt_re_qp *qp, struct ib_udata *udata)
{
struct bnxt_re_qp_req ureq;
struct bnxt_qplib_qp *qplib_qp = &qp->qplib_qp;
struct ib_umem *umem;
int bytes = 0;
struct ib_ucontext *context = pd->ib_pd.uobject->context;
struct bnxt_re_ucontext *cntx = container_of(context,
struct bnxt_re_ucontext,
ib_uctx);
if (ib_copy_from_udata(&ureq, udata, sizeof(ureq)))
return -EFAULT;
bytes = (qplib_qp->sq.max_wqe * BNXT_QPLIB_MAX_SQE_ENTRY_SIZE);
/* Consider mapping PSN search memory only for RC QPs. */
if (qplib_qp->type == CMDQ_CREATE_QP_TYPE_RC)
bytes += (qplib_qp->sq.max_wqe * sizeof(struct sq_psn_search));
bytes = PAGE_ALIGN(bytes);
umem = ib_umem_get(context, ureq.qpsva, bytes,
IB_ACCESS_LOCAL_WRITE, 1);
if (IS_ERR(umem))
return PTR_ERR(umem);
qp->sumem = umem;
qplib_qp->sq.sglist = umem->sg_head.sgl;
qplib_qp->sq.nmap = umem->nmap;
qplib_qp->qp_handle = ureq.qp_handle;
if (!qp->qplib_qp.srq) {
bytes = (qplib_qp->rq.max_wqe * BNXT_QPLIB_MAX_RQE_ENTRY_SIZE);
bytes = PAGE_ALIGN(bytes);
umem = ib_umem_get(context, ureq.qprva, bytes,
IB_ACCESS_LOCAL_WRITE, 1);
if (IS_ERR(umem))
goto rqfail;
qp->rumem = umem;
qplib_qp->rq.sglist = umem->sg_head.sgl;
qplib_qp->rq.nmap = umem->nmap;
}
qplib_qp->dpi = &cntx->dpi;
return 0;
rqfail:
ib_umem_release(qp->sumem);
qp->sumem = NULL;
qplib_qp->sq.sglist = NULL;
qplib_qp->sq.nmap = 0;
return PTR_ERR(umem);
}
static struct bnxt_re_ah *bnxt_re_create_shadow_qp_ah
(struct bnxt_re_pd *pd,
struct bnxt_qplib_res *qp1_res,
struct bnxt_qplib_qp *qp1_qp)
{
struct bnxt_re_dev *rdev = pd->rdev;
struct bnxt_re_ah *ah;
union ib_gid sgid;
int rc;
ah = kzalloc(sizeof(*ah), GFP_KERNEL);
if (!ah)
return NULL;
ah->rdev = rdev;
ah->qplib_ah.pd = &pd->qplib_pd;
rc = bnxt_re_query_gid(&rdev->ibdev, 1, 0, &sgid);
if (rc)
goto fail;
/* supply the dgid data same as sgid */
memcpy(ah->qplib_ah.dgid.data, &sgid.raw,
sizeof(union ib_gid));
ah->qplib_ah.sgid_index = 0;
ah->qplib_ah.traffic_class = 0;
ah->qplib_ah.flow_label = 0;
ah->qplib_ah.hop_limit = 1;
ah->qplib_ah.sl = 0;
/* Have DMAC same as SMAC */
ether_addr_copy(ah->qplib_ah.dmac, rdev->netdev->dev_addr);
rc = bnxt_qplib_create_ah(&rdev->qplib_res, &ah->qplib_ah);
if (rc) {
dev_err(rdev_to_dev(rdev),
"Failed to allocate HW AH for Shadow QP");
goto fail;
}
return ah;
fail:
kfree(ah);
return NULL;
}
static struct bnxt_re_qp *bnxt_re_create_shadow_qp
(struct bnxt_re_pd *pd,
struct bnxt_qplib_res *qp1_res,
struct bnxt_qplib_qp *qp1_qp)
{
struct bnxt_re_dev *rdev = pd->rdev;
struct bnxt_re_qp *qp;
int rc;
qp = kzalloc(sizeof(*qp), GFP_KERNEL);
if (!qp)
return NULL;
qp->rdev = rdev;
/* Initialize the shadow QP structure from the QP1 values */
ether_addr_copy(qp->qplib_qp.smac, rdev->netdev->dev_addr);
qp->qplib_qp.pd = &pd->qplib_pd;
qp->qplib_qp.qp_handle = (u64)(unsigned long)(&qp->qplib_qp);
qp->qplib_qp.type = IB_QPT_UD;
qp->qplib_qp.max_inline_data = 0;
qp->qplib_qp.sig_type = true;
/* Shadow QP SQ depth should be same as QP1 RQ depth */
qp->qplib_qp.sq.max_wqe = qp1_qp->rq.max_wqe;
qp->qplib_qp.sq.max_sge = 2;
/* Q full delta can be 1 since it is internal QP */
qp->qplib_qp.sq.q_full_delta = 1;
qp->qplib_qp.scq = qp1_qp->scq;
qp->qplib_qp.rcq = qp1_qp->rcq;
qp->qplib_qp.rq.max_wqe = qp1_qp->rq.max_wqe;
qp->qplib_qp.rq.max_sge = qp1_qp->rq.max_sge;
/* Q full delta can be 1 since it is internal QP */
qp->qplib_qp.rq.q_full_delta = 1;
qp->qplib_qp.mtu = qp1_qp->mtu;
qp->qplib_qp.sq_hdr_buf_size = 0;
qp->qplib_qp.rq_hdr_buf_size = BNXT_QPLIB_MAX_GRH_HDR_SIZE_IPV6;
qp->qplib_qp.dpi = &rdev->dpi_privileged;
rc = bnxt_qplib_create_qp(qp1_res, &qp->qplib_qp);
if (rc)
goto fail;
rdev->sqp_id = qp->qplib_qp.id;
spin_lock_init(&qp->sq_lock);
INIT_LIST_HEAD(&qp->list);
mutex_lock(&rdev->qp_lock);
list_add_tail(&qp->list, &rdev->qp_list);
atomic_inc(&rdev->qp_count);
mutex_unlock(&rdev->qp_lock);
return qp;
fail:
kfree(qp);
return NULL;
}
struct ib_qp *bnxt_re_create_qp(struct ib_pd *ib_pd,
struct ib_qp_init_attr *qp_init_attr,
struct ib_udata *udata)
{
struct bnxt_re_pd *pd = container_of(ib_pd, struct bnxt_re_pd, ib_pd);
struct bnxt_re_dev *rdev = pd->rdev;
struct bnxt_qplib_dev_attr *dev_attr = &rdev->dev_attr;
struct bnxt_re_qp *qp;
struct bnxt_re_cq *cq;
struct bnxt_re_srq *srq;
int rc, entries;
if ((qp_init_attr->cap.max_send_wr > dev_attr->max_qp_wqes) ||
(qp_init_attr->cap.max_recv_wr > dev_attr->max_qp_wqes) ||
(qp_init_attr->cap.max_send_sge > dev_attr->max_qp_sges) ||
(qp_init_attr->cap.max_recv_sge > dev_attr->max_qp_sges) ||
(qp_init_attr->cap.max_inline_data > dev_attr->max_inline_data))
return ERR_PTR(-EINVAL);
qp = kzalloc(sizeof(*qp), GFP_KERNEL);
if (!qp)
return ERR_PTR(-ENOMEM);
qp->rdev = rdev;
ether_addr_copy(qp->qplib_qp.smac, rdev->netdev->dev_addr);
qp->qplib_qp.pd = &pd->qplib_pd;
qp->qplib_qp.qp_handle = (u64)(unsigned long)(&qp->qplib_qp);
qp->qplib_qp.type = __from_ib_qp_type(qp_init_attr->qp_type);
if (qp->qplib_qp.type == IB_QPT_MAX) {
dev_err(rdev_to_dev(rdev), "QP type 0x%x not supported",
qp->qplib_qp.type);
rc = -EINVAL;
goto fail;
}
qp->qplib_qp.max_inline_data = qp_init_attr->cap.max_inline_data;
qp->qplib_qp.sig_type = ((qp_init_attr->sq_sig_type ==
IB_SIGNAL_ALL_WR) ? true : false);
qp->qplib_qp.sq.max_sge = qp_init_attr->cap.max_send_sge;
if (qp->qplib_qp.sq.max_sge > dev_attr->max_qp_sges)
qp->qplib_qp.sq.max_sge = dev_attr->max_qp_sges;
if (qp_init_attr->send_cq) {
cq = container_of(qp_init_attr->send_cq, struct bnxt_re_cq,
ib_cq);
if (!cq) {
dev_err(rdev_to_dev(rdev), "Send CQ not found");
rc = -EINVAL;
goto fail;
}
qp->qplib_qp.scq = &cq->qplib_cq;
qp->scq = cq;
}
if (qp_init_attr->recv_cq) {
cq = container_of(qp_init_attr->recv_cq, struct bnxt_re_cq,
ib_cq);
if (!cq) {
dev_err(rdev_to_dev(rdev), "Receive CQ not found");
rc = -EINVAL;
goto fail;
}
qp->qplib_qp.rcq = &cq->qplib_cq;
qp->rcq = cq;
}
if (qp_init_attr->srq) {
srq = container_of(qp_init_attr->srq, struct bnxt_re_srq,
ib_srq);
if (!srq) {
dev_err(rdev_to_dev(rdev), "SRQ not found");
rc = -EINVAL;
goto fail;
}
qp->qplib_qp.srq = &srq->qplib_srq;
qp->qplib_qp.rq.max_wqe = 0;
} else {
/* Allocate 1 more than what's provided so posting max doesn't
* mean empty
*/
entries = roundup_pow_of_two(qp_init_attr->cap.max_recv_wr + 1);
qp->qplib_qp.rq.max_wqe = min_t(u32, entries,
dev_attr->max_qp_wqes + 1);
qp->qplib_qp.rq.q_full_delta = qp->qplib_qp.rq.max_wqe -
qp_init_attr->cap.max_recv_wr;
qp->qplib_qp.rq.max_sge = qp_init_attr->cap.max_recv_sge;
if (qp->qplib_qp.rq.max_sge > dev_attr->max_qp_sges)
qp->qplib_qp.rq.max_sge = dev_attr->max_qp_sges;
}
qp->qplib_qp.mtu = ib_mtu_enum_to_int(iboe_get_mtu(rdev->netdev->mtu));
if (qp_init_attr->qp_type == IB_QPT_GSI) {
/* Allocate 1 more than what's provided */
entries = roundup_pow_of_two(qp_init_attr->cap.max_send_wr + 1);
qp->qplib_qp.sq.max_wqe = min_t(u32, entries,
dev_attr->max_qp_wqes + 1);
qp->qplib_qp.sq.q_full_delta = qp->qplib_qp.sq.max_wqe -
qp_init_attr->cap.max_send_wr;
qp->qplib_qp.rq.max_sge = dev_attr->max_qp_sges;
if (qp->qplib_qp.rq.max_sge > dev_attr->max_qp_sges)
qp->qplib_qp.rq.max_sge = dev_attr->max_qp_sges;
qp->qplib_qp.sq.max_sge++;
if (qp->qplib_qp.sq.max_sge > dev_attr->max_qp_sges)
qp->qplib_qp.sq.max_sge = dev_attr->max_qp_sges;
qp->qplib_qp.rq_hdr_buf_size =
BNXT_QPLIB_MAX_QP1_RQ_HDR_SIZE_V2;
qp->qplib_qp.sq_hdr_buf_size =
BNXT_QPLIB_MAX_QP1_SQ_HDR_SIZE_V2;
qp->qplib_qp.dpi = &rdev->dpi_privileged;
rc = bnxt_qplib_create_qp1(&rdev->qplib_res, &qp->qplib_qp);
if (rc) {
dev_err(rdev_to_dev(rdev), "Failed to create HW QP1");
goto fail;
}
/* Create a shadow QP to handle the QP1 traffic */
rdev->qp1_sqp = bnxt_re_create_shadow_qp(pd, &rdev->qplib_res,
&qp->qplib_qp);
if (!rdev->qp1_sqp) {
rc = -EINVAL;
dev_err(rdev_to_dev(rdev),
"Failed to create Shadow QP for QP1");
goto qp_destroy;
}
rdev->sqp_ah = bnxt_re_create_shadow_qp_ah(pd, &rdev->qplib_res,
&qp->qplib_qp);
if (!rdev->sqp_ah) {
bnxt_qplib_destroy_qp(&rdev->qplib_res,
&rdev->qp1_sqp->qplib_qp);
rc = -EINVAL;
dev_err(rdev_to_dev(rdev),
"Failed to create AH entry for ShadowQP");
goto qp_destroy;
}
} else {
/* Allocate 128 + 1 more than what's provided */
entries = roundup_pow_of_two(qp_init_attr->cap.max_send_wr +
BNXT_QPLIB_RESERVED_QP_WRS + 1);
qp->qplib_qp.sq.max_wqe = min_t(u32, entries,
dev_attr->max_qp_wqes +
BNXT_QPLIB_RESERVED_QP_WRS + 1);
qp->qplib_qp.sq.q_full_delta = BNXT_QPLIB_RESERVED_QP_WRS + 1;
/*
* Reserving one slot for Phantom WQE. Application can
* post one extra entry in this case. But allowing this to avoid
* unexpected Queue full condition
*/
qp->qplib_qp.sq.q_full_delta -= 1;
qp->qplib_qp.max_rd_atomic = dev_attr->max_qp_rd_atom;
qp->qplib_qp.max_dest_rd_atomic = dev_attr->max_qp_init_rd_atom;
if (udata) {
rc = bnxt_re_init_user_qp(rdev, pd, qp, udata);
if (rc)
goto fail;
} else {
qp->qplib_qp.dpi = &rdev->dpi_privileged;
}
rc = bnxt_qplib_create_qp(&rdev->qplib_res, &qp->qplib_qp);
if (rc) {
dev_err(rdev_to_dev(rdev), "Failed to create HW QP");
goto free_umem;
}
}
qp->ib_qp.qp_num = qp->qplib_qp.id;
spin_lock_init(&qp->sq_lock);
spin_lock_init(&qp->rq_lock);
if (udata) {
struct bnxt_re_qp_resp resp;
resp.qpid = qp->ib_qp.qp_num;
resp.rsvd = 0;
rc = ib_copy_to_udata(udata, &resp, sizeof(resp));
if (rc) {
dev_err(rdev_to_dev(rdev), "Failed to copy QP udata");
goto qp_destroy;
}
}
INIT_LIST_HEAD(&qp->list);
mutex_lock(&rdev->qp_lock);
list_add_tail(&qp->list, &rdev->qp_list);
atomic_inc(&rdev->qp_count);
mutex_unlock(&rdev->qp_lock);
return &qp->ib_qp;
qp_destroy:
bnxt_qplib_destroy_qp(&rdev->qplib_res, &qp->qplib_qp);
free_umem:
if (udata) {
if (qp->rumem)
ib_umem_release(qp->rumem);
if (qp->sumem)
ib_umem_release(qp->sumem);
}
fail:
kfree(qp);
return ERR_PTR(rc);
}
static u8 __from_ib_qp_state(enum ib_qp_state state)
{
switch (state) {
case IB_QPS_RESET:
return CMDQ_MODIFY_QP_NEW_STATE_RESET;
case IB_QPS_INIT:
return CMDQ_MODIFY_QP_NEW_STATE_INIT;
case IB_QPS_RTR:
return CMDQ_MODIFY_QP_NEW_STATE_RTR;
case IB_QPS_RTS:
return CMDQ_MODIFY_QP_NEW_STATE_RTS;
case IB_QPS_SQD:
return CMDQ_MODIFY_QP_NEW_STATE_SQD;
case IB_QPS_SQE:
return CMDQ_MODIFY_QP_NEW_STATE_SQE;
case IB_QPS_ERR:
default:
return CMDQ_MODIFY_QP_NEW_STATE_ERR;
}
}
static enum ib_qp_state __to_ib_qp_state(u8 state)
{
switch (state) {
case CMDQ_MODIFY_QP_NEW_STATE_RESET:
return IB_QPS_RESET;
case CMDQ_MODIFY_QP_NEW_STATE_INIT:
return IB_QPS_INIT;
case CMDQ_MODIFY_QP_NEW_STATE_RTR:
return IB_QPS_RTR;
case CMDQ_MODIFY_QP_NEW_STATE_RTS:
return IB_QPS_RTS;
case CMDQ_MODIFY_QP_NEW_STATE_SQD:
return IB_QPS_SQD;
case CMDQ_MODIFY_QP_NEW_STATE_SQE:
return IB_QPS_SQE;
case CMDQ_MODIFY_QP_NEW_STATE_ERR:
default:
return IB_QPS_ERR;
}
}
static u32 __from_ib_mtu(enum ib_mtu mtu)
{
switch (mtu) {
case IB_MTU_256:
return CMDQ_MODIFY_QP_PATH_MTU_MTU_256;
case IB_MTU_512:
return CMDQ_MODIFY_QP_PATH_MTU_MTU_512;
case IB_MTU_1024:
return CMDQ_MODIFY_QP_PATH_MTU_MTU_1024;
case IB_MTU_2048:
return CMDQ_MODIFY_QP_PATH_MTU_MTU_2048;
case IB_MTU_4096:
return CMDQ_MODIFY_QP_PATH_MTU_MTU_4096;
default:
return CMDQ_MODIFY_QP_PATH_MTU_MTU_2048;
}
}
static enum ib_mtu __to_ib_mtu(u32 mtu)
{
switch (mtu & CREQ_QUERY_QP_RESP_SB_PATH_MTU_MASK) {
case CMDQ_MODIFY_QP_PATH_MTU_MTU_256:
return IB_MTU_256;
case CMDQ_MODIFY_QP_PATH_MTU_MTU_512:
return IB_MTU_512;
case CMDQ_MODIFY_QP_PATH_MTU_MTU_1024:
return IB_MTU_1024;
case CMDQ_MODIFY_QP_PATH_MTU_MTU_2048:
return IB_MTU_2048;
case CMDQ_MODIFY_QP_PATH_MTU_MTU_4096:
return IB_MTU_4096;
default:
return IB_MTU_2048;
}
}
/* Shared Receive Queues */
int bnxt_re_destroy_srq(struct ib_srq *ib_srq)
{
struct bnxt_re_srq *srq = container_of(ib_srq, struct bnxt_re_srq,
ib_srq);
struct bnxt_re_dev *rdev = srq->rdev;
struct bnxt_qplib_srq *qplib_srq = &srq->qplib_srq;
struct bnxt_qplib_nq *nq = NULL;
int rc;
if (qplib_srq->cq)
nq = qplib_srq->cq->nq;
rc = bnxt_qplib_destroy_srq(&rdev->qplib_res, qplib_srq);
if (rc) {
dev_err(rdev_to_dev(rdev), "Destroy HW SRQ failed!");
return rc;
}
if (srq->umem)
ib_umem_release(srq->umem);
kfree(srq);
atomic_dec(&rdev->srq_count);
if (nq)
nq->budget--;
return 0;
}
static int bnxt_re_init_user_srq(struct bnxt_re_dev *rdev,
struct bnxt_re_pd *pd,
struct bnxt_re_srq *srq,
struct ib_udata *udata)
{
struct bnxt_re_srq_req ureq;
struct bnxt_qplib_srq *qplib_srq = &srq->qplib_srq;
struct ib_umem *umem;
int bytes = 0;
struct ib_ucontext *context = pd->ib_pd.uobject->context;
struct bnxt_re_ucontext *cntx = container_of(context,
struct bnxt_re_ucontext,
ib_uctx);
if (ib_copy_from_udata(&ureq, udata, sizeof(ureq)))
return -EFAULT;
bytes = (qplib_srq->max_wqe * BNXT_QPLIB_MAX_RQE_ENTRY_SIZE);
bytes = PAGE_ALIGN(bytes);
umem = ib_umem_get(context, ureq.srqva, bytes,
IB_ACCESS_LOCAL_WRITE, 1);
if (IS_ERR(umem))
return PTR_ERR(umem);
srq->umem = umem;
qplib_srq->nmap = umem->nmap;
qplib_srq->sglist = umem->sg_head.sgl;
qplib_srq->srq_handle = ureq.srq_handle;
qplib_srq->dpi = &cntx->dpi;
return 0;
}
struct ib_srq *bnxt_re_create_srq(struct ib_pd *ib_pd,
struct ib_srq_init_attr *srq_init_attr,
struct ib_udata *udata)
{
struct bnxt_re_pd *pd = container_of(ib_pd, struct bnxt_re_pd, ib_pd);
struct bnxt_re_dev *rdev = pd->rdev;
struct bnxt_qplib_dev_attr *dev_attr = &rdev->dev_attr;
struct bnxt_re_srq *srq;
struct bnxt_qplib_nq *nq = NULL;
int rc, entries;
if (srq_init_attr->attr.max_wr >= dev_attr->max_srq_wqes) {
dev_err(rdev_to_dev(rdev), "Create CQ failed - max exceeded");
rc = -EINVAL;
goto exit;
}
if (srq_init_attr->srq_type != IB_SRQT_BASIC) {
rc = -EOPNOTSUPP;
goto exit;
}
srq = kzalloc(sizeof(*srq), GFP_KERNEL);
if (!srq) {
rc = -ENOMEM;
goto exit;
}
srq->rdev = rdev;
srq->qplib_srq.pd = &pd->qplib_pd;
srq->qplib_srq.dpi = &rdev->dpi_privileged;
/* Allocate 1 more than what's provided so posting max doesn't
* mean empty
*/
entries = roundup_pow_of_two(srq_init_attr->attr.max_wr + 1);
if (entries > dev_attr->max_srq_wqes + 1)
entries = dev_attr->max_srq_wqes + 1;
srq->qplib_srq.max_wqe = entries;
srq->qplib_srq.max_sge = srq_init_attr->attr.max_sge;
srq->qplib_srq.threshold = srq_init_attr->attr.srq_limit;
srq->srq_limit = srq_init_attr->attr.srq_limit;
srq->qplib_srq.eventq_hw_ring_id = rdev->nq[0].ring_id;
nq = &rdev->nq[0];
if (udata) {
rc = bnxt_re_init_user_srq(rdev, pd, srq, udata);
if (rc)
goto fail;
}
rc = bnxt_qplib_create_srq(&rdev->qplib_res, &srq->qplib_srq);
if (rc) {
dev_err(rdev_to_dev(rdev), "Create HW SRQ failed!");
goto fail;
}
if (udata) {
struct bnxt_re_srq_resp resp;
resp.srqid = srq->qplib_srq.id;
rc = ib_copy_to_udata(udata, &resp, sizeof(resp));
if (rc) {
dev_err(rdev_to_dev(rdev), "SRQ copy to udata failed!");
bnxt_qplib_destroy_srq(&rdev->qplib_res,
&srq->qplib_srq);
goto fail;
}
}
if (nq)
nq->budget++;
atomic_inc(&rdev->srq_count);
return &srq->ib_srq;
fail:
if (srq->umem)
ib_umem_release(srq->umem);
kfree(srq);
exit:
return ERR_PTR(rc);
}
int bnxt_re_modify_srq(struct ib_srq *ib_srq, struct ib_srq_attr *srq_attr,
enum ib_srq_attr_mask srq_attr_mask,
struct ib_udata *udata)
{
struct bnxt_re_srq *srq = container_of(ib_srq, struct bnxt_re_srq,
ib_srq);
struct bnxt_re_dev *rdev = srq->rdev;
int rc;
switch (srq_attr_mask) {
case IB_SRQ_MAX_WR:
/* SRQ resize is not supported */
break;
case IB_SRQ_LIMIT:
/* Change the SRQ threshold */
if (srq_attr->srq_limit > srq->qplib_srq.max_wqe)
return -EINVAL;
srq->qplib_srq.threshold = srq_attr->srq_limit;
rc = bnxt_qplib_modify_srq(&rdev->qplib_res, &srq->qplib_srq);
if (rc) {
dev_err(rdev_to_dev(rdev), "Modify HW SRQ failed!");
return rc;
}
/* On success, update the shadow */
srq->srq_limit = srq_attr->srq_limit;
/* No need to Build and send response back to udata */
break;
default:
dev_err(rdev_to_dev(rdev),
"Unsupported srq_attr_mask 0x%x", srq_attr_mask);
return -EINVAL;
}
return 0;
}
int bnxt_re_query_srq(struct ib_srq *ib_srq, struct ib_srq_attr *srq_attr)
{
struct bnxt_re_srq *srq = container_of(ib_srq, struct bnxt_re_srq,
ib_srq);
struct bnxt_re_srq tsrq;
struct bnxt_re_dev *rdev = srq->rdev;
int rc;
/* Get live SRQ attr */
tsrq.qplib_srq.id = srq->qplib_srq.id;
rc = bnxt_qplib_query_srq(&rdev->qplib_res, &tsrq.qplib_srq);
if (rc) {
dev_err(rdev_to_dev(rdev), "Query HW SRQ failed!");
return rc;
}
srq_attr->max_wr = srq->qplib_srq.max_wqe;
srq_attr->max_sge = srq->qplib_srq.max_sge;
srq_attr->srq_limit = tsrq.qplib_srq.threshold;
return 0;
}
int bnxt_re_post_srq_recv(struct ib_srq *ib_srq, const struct ib_recv_wr *wr,
const struct ib_recv_wr **bad_wr)
{
struct bnxt_re_srq *srq = container_of(ib_srq, struct bnxt_re_srq,
ib_srq);
struct bnxt_qplib_swqe wqe;
unsigned long flags;
int rc = 0;
spin_lock_irqsave(&srq->lock, flags);
while (wr) {
/* Transcribe each ib_recv_wr to qplib_swqe */
wqe.num_sge = wr->num_sge;
bnxt_re_build_sgl(wr->sg_list, wqe.sg_list, wr->num_sge);
wqe.wr_id = wr->wr_id;
wqe.type = BNXT_QPLIB_SWQE_TYPE_RECV;
rc = bnxt_qplib_post_srq_recv(&srq->qplib_srq, &wqe);
if (rc) {
*bad_wr = wr;
break;
}
wr = wr->next;
}
spin_unlock_irqrestore(&srq->lock, flags);
return rc;
}
static int bnxt_re_modify_shadow_qp(struct bnxt_re_dev *rdev,
struct bnxt_re_qp *qp1_qp,
int qp_attr_mask)
{
struct bnxt_re_qp *qp = rdev->qp1_sqp;
int rc = 0;
if (qp_attr_mask & IB_QP_STATE) {
qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_STATE;
qp->qplib_qp.state = qp1_qp->qplib_qp.state;
}
if (qp_attr_mask & IB_QP_PKEY_INDEX) {
qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_PKEY;
qp->qplib_qp.pkey_index = qp1_qp->qplib_qp.pkey_index;
}
if (qp_attr_mask & IB_QP_QKEY) {
qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_QKEY;
/* Using a Random QKEY */
qp->qplib_qp.qkey = 0x81818181;
}
if (qp_attr_mask & IB_QP_SQ_PSN) {
qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_SQ_PSN;
qp->qplib_qp.sq.psn = qp1_qp->qplib_qp.sq.psn;
}
rc = bnxt_qplib_modify_qp(&rdev->qplib_res, &qp->qplib_qp);
if (rc)
dev_err(rdev_to_dev(rdev),
"Failed to modify Shadow QP for QP1");
return rc;
}
int bnxt_re_modify_qp(struct ib_qp *ib_qp, struct ib_qp_attr *qp_attr,
int qp_attr_mask, struct ib_udata *udata)
{
struct bnxt_re_qp *qp = container_of(ib_qp, struct bnxt_re_qp, ib_qp);
struct bnxt_re_dev *rdev = qp->rdev;
struct bnxt_qplib_dev_attr *dev_attr = &rdev->dev_attr;
enum ib_qp_state curr_qp_state, new_qp_state;
int rc, entries;
unsigned int flags;
u8 nw_type;
qp->qplib_qp.modify_flags = 0;
if (qp_attr_mask & IB_QP_STATE) {
curr_qp_state = __to_ib_qp_state(qp->qplib_qp.cur_qp_state);
new_qp_state = qp_attr->qp_state;
if (!ib_modify_qp_is_ok(curr_qp_state, new_qp_state,
ib_qp->qp_type, qp_attr_mask,
IB_LINK_LAYER_ETHERNET)) {
dev_err(rdev_to_dev(rdev),
"Invalid attribute mask: %#x specified ",
qp_attr_mask);
dev_err(rdev_to_dev(rdev),
"for qpn: %#x type: %#x",
ib_qp->qp_num, ib_qp->qp_type);
dev_err(rdev_to_dev(rdev),
"curr_qp_state=0x%x, new_qp_state=0x%x\n",
curr_qp_state, new_qp_state);
return -EINVAL;
}
qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_STATE;
qp->qplib_qp.state = __from_ib_qp_state(qp_attr->qp_state);
if (!qp->sumem &&
qp->qplib_qp.state == CMDQ_MODIFY_QP_NEW_STATE_ERR) {
dev_dbg(rdev_to_dev(rdev),
"Move QP = %p to flush list\n",
qp);
flags = bnxt_re_lock_cqs(qp);
bnxt_qplib_add_flush_qp(&qp->qplib_qp);
bnxt_re_unlock_cqs(qp, flags);
}
if (!qp->sumem &&
qp->qplib_qp.state == CMDQ_MODIFY_QP_NEW_STATE_RESET) {
dev_dbg(rdev_to_dev(rdev),
"Move QP = %p out of flush list\n",
qp);
flags = bnxt_re_lock_cqs(qp);
bnxt_qplib_clean_qp(&qp->qplib_qp);
bnxt_re_unlock_cqs(qp, flags);
}
}
if (qp_attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY) {
qp->qplib_qp.modify_flags |=
CMDQ_MODIFY_QP_MODIFY_MASK_EN_SQD_ASYNC_NOTIFY;
qp->qplib_qp.en_sqd_async_notify = true;
}
if (qp_attr_mask & IB_QP_ACCESS_FLAGS) {
qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_ACCESS;
qp->qplib_qp.access =
__from_ib_access_flags(qp_attr->qp_access_flags);
/* LOCAL_WRITE access must be set to allow RC receive */
qp->qplib_qp.access |= BNXT_QPLIB_ACCESS_LOCAL_WRITE;
}
if (qp_attr_mask & IB_QP_PKEY_INDEX) {
qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_PKEY;
qp->qplib_qp.pkey_index = qp_attr->pkey_index;
}
if (qp_attr_mask & IB_QP_QKEY) {
qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_QKEY;
qp->qplib_qp.qkey = qp_attr->qkey;
}
if (qp_attr_mask & IB_QP_AV) {
const struct ib_global_route *grh =
rdma_ah_read_grh(&qp_attr->ah_attr);
const struct ib_gid_attr *sgid_attr;
qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_DGID |
CMDQ_MODIFY_QP_MODIFY_MASK_FLOW_LABEL |
CMDQ_MODIFY_QP_MODIFY_MASK_SGID_INDEX |
CMDQ_MODIFY_QP_MODIFY_MASK_HOP_LIMIT |
CMDQ_MODIFY_QP_MODIFY_MASK_TRAFFIC_CLASS |
CMDQ_MODIFY_QP_MODIFY_MASK_DEST_MAC |
CMDQ_MODIFY_QP_MODIFY_MASK_VLAN_ID;
memcpy(qp->qplib_qp.ah.dgid.data, grh->dgid.raw,
sizeof(qp->qplib_qp.ah.dgid.data));
qp->qplib_qp.ah.flow_label = grh->flow_label;
/* If RoCE V2 is enabled, stack will have two entries for
* each GID entry. Avoiding this duplicte entry in HW. Dividing
* the GID index by 2 for RoCE V2
*/
qp->qplib_qp.ah.sgid_index = grh->sgid_index / 2;
qp->qplib_qp.ah.host_sgid_index = grh->sgid_index;
qp->qplib_qp.ah.hop_limit = grh->hop_limit;
qp->qplib_qp.ah.traffic_class = grh->traffic_class;
qp->qplib_qp.ah.sl = rdma_ah_get_sl(&qp_attr->ah_attr);
ether_addr_copy(qp->qplib_qp.ah.dmac,
qp_attr->ah_attr.roce.dmac);
sgid_attr = qp_attr->ah_attr.grh.sgid_attr;
memcpy(qp->qplib_qp.smac, sgid_attr->ndev->dev_addr,
ETH_ALEN);
nw_type = rdma_gid_attr_network_type(sgid_attr);
switch (nw_type) {
case RDMA_NETWORK_IPV4:
qp->qplib_qp.nw_type =
CMDQ_MODIFY_QP_NETWORK_TYPE_ROCEV2_IPV4;
break;
case RDMA_NETWORK_IPV6:
qp->qplib_qp.nw_type =
CMDQ_MODIFY_QP_NETWORK_TYPE_ROCEV2_IPV6;
break;
default:
qp->qplib_qp.nw_type =
CMDQ_MODIFY_QP_NETWORK_TYPE_ROCEV1;
break;
}
}
if (qp_attr_mask & IB_QP_PATH_MTU) {
qp->qplib_qp.modify_flags |=
CMDQ_MODIFY_QP_MODIFY_MASK_PATH_MTU;
qp->qplib_qp.path_mtu = __from_ib_mtu(qp_attr->path_mtu);
qp->qplib_qp.mtu = ib_mtu_enum_to_int(qp_attr->path_mtu);
} else if (qp_attr->qp_state == IB_QPS_RTR) {
qp->qplib_qp.modify_flags |=
CMDQ_MODIFY_QP_MODIFY_MASK_PATH_MTU;
qp->qplib_qp.path_mtu =
__from_ib_mtu(iboe_get_mtu(rdev->netdev->mtu));
qp->qplib_qp.mtu =
ib_mtu_enum_to_int(iboe_get_mtu(rdev->netdev->mtu));
}
if (qp_attr_mask & IB_QP_TIMEOUT) {
qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_TIMEOUT;
qp->qplib_qp.timeout = qp_attr->timeout;
}
if (qp_attr_mask & IB_QP_RETRY_CNT) {
qp->qplib_qp.modify_flags |=
CMDQ_MODIFY_QP_MODIFY_MASK_RETRY_CNT;
qp->qplib_qp.retry_cnt = qp_attr->retry_cnt;
}
if (qp_attr_mask & IB_QP_RNR_RETRY) {
qp->qplib_qp.modify_flags |=
CMDQ_MODIFY_QP_MODIFY_MASK_RNR_RETRY;
qp->qplib_qp.rnr_retry = qp_attr->rnr_retry;
}
if (qp_attr_mask & IB_QP_MIN_RNR_TIMER) {
qp->qplib_qp.modify_flags |=
CMDQ_MODIFY_QP_MODIFY_MASK_MIN_RNR_TIMER;
qp->qplib_qp.min_rnr_timer = qp_attr->min_rnr_timer;
}
if (qp_attr_mask & IB_QP_RQ_PSN) {
qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_RQ_PSN;
qp->qplib_qp.rq.psn = qp_attr->rq_psn;
}
if (qp_attr_mask & IB_QP_MAX_QP_RD_ATOMIC) {
qp->qplib_qp.modify_flags |=
CMDQ_MODIFY_QP_MODIFY_MASK_MAX_RD_ATOMIC;
/* Cap the max_rd_atomic to device max */
qp->qplib_qp.max_rd_atomic = min_t(u32, qp_attr->max_rd_atomic,
dev_attr->max_qp_rd_atom);
}
if (qp_attr_mask & IB_QP_SQ_PSN) {
qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_SQ_PSN;
qp->qplib_qp.sq.psn = qp_attr->sq_psn;
}
if (qp_attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) {
if (qp_attr->max_dest_rd_atomic >
dev_attr->max_qp_init_rd_atom) {
dev_err(rdev_to_dev(rdev),
"max_dest_rd_atomic requested%d is > dev_max%d",
qp_attr->max_dest_rd_atomic,
dev_attr->max_qp_init_rd_atom);
return -EINVAL;
}
qp->qplib_qp.modify_flags |=
CMDQ_MODIFY_QP_MODIFY_MASK_MAX_DEST_RD_ATOMIC;
qp->qplib_qp.max_dest_rd_atomic = qp_attr->max_dest_rd_atomic;
}
if (qp_attr_mask & IB_QP_CAP) {
qp->qplib_qp.modify_flags |=
CMDQ_MODIFY_QP_MODIFY_MASK_SQ_SIZE |
CMDQ_MODIFY_QP_MODIFY_MASK_RQ_SIZE |
CMDQ_MODIFY_QP_MODIFY_MASK_SQ_SGE |
CMDQ_MODIFY_QP_MODIFY_MASK_RQ_SGE |
CMDQ_MODIFY_QP_MODIFY_MASK_MAX_INLINE_DATA;
if ((qp_attr->cap.max_send_wr >= dev_attr->max_qp_wqes) ||
(qp_attr->cap.max_recv_wr >= dev_attr->max_qp_wqes) ||
(qp_attr->cap.max_send_sge >= dev_attr->max_qp_sges) ||
(qp_attr->cap.max_recv_sge >= dev_attr->max_qp_sges) ||
(qp_attr->cap.max_inline_data >=
dev_attr->max_inline_data)) {
dev_err(rdev_to_dev(rdev),
"Create QP failed - max exceeded");
return -EINVAL;
}
entries = roundup_pow_of_two(qp_attr->cap.max_send_wr);
qp->qplib_qp.sq.max_wqe = min_t(u32, entries,
dev_attr->max_qp_wqes + 1);
qp->qplib_qp.sq.q_full_delta = qp->qplib_qp.sq.max_wqe -
qp_attr->cap.max_send_wr;
/*
* Reserving one slot for Phantom WQE. Some application can
* post one extra entry in this case. Allowing this to avoid
* unexpected Queue full condition
*/
qp->qplib_qp.sq.q_full_delta -= 1;
qp->qplib_qp.sq.max_sge = qp_attr->cap.max_send_sge;
if (qp->qplib_qp.rq.max_wqe) {
entries = roundup_pow_of_two(qp_attr->cap.max_recv_wr);
qp->qplib_qp.rq.max_wqe =
min_t(u32, entries, dev_attr->max_qp_wqes + 1);
qp->qplib_qp.rq.q_full_delta = qp->qplib_qp.rq.max_wqe -
qp_attr->cap.max_recv_wr;
qp->qplib_qp.rq.max_sge = qp_attr->cap.max_recv_sge;
} else {
/* SRQ was used prior, just ignore the RQ caps */
}
}
if (qp_attr_mask & IB_QP_DEST_QPN) {
qp->qplib_qp.modify_flags |=
CMDQ_MODIFY_QP_MODIFY_MASK_DEST_QP_ID;
qp->qplib_qp.dest_qpn = qp_attr->dest_qp_num;
}
rc = bnxt_qplib_modify_qp(&rdev->qplib_res, &qp->qplib_qp);
if (rc) {
dev_err(rdev_to_dev(rdev), "Failed to modify HW QP");
return rc;
}
if (ib_qp->qp_type == IB_QPT_GSI && rdev->qp1_sqp)
rc = bnxt_re_modify_shadow_qp(rdev, qp, qp_attr_mask);
return rc;
}
int bnxt_re_query_qp(struct ib_qp *ib_qp, struct ib_qp_attr *qp_attr,
int qp_attr_mask, struct ib_qp_init_attr *qp_init_attr)
{
struct bnxt_re_qp *qp = container_of(ib_qp, struct bnxt_re_qp, ib_qp);
struct bnxt_re_dev *rdev = qp->rdev;
struct bnxt_qplib_qp *qplib_qp;
int rc;
qplib_qp = kzalloc(sizeof(*qplib_qp), GFP_KERNEL);
if (!qplib_qp)
return -ENOMEM;
qplib_qp->id = qp->qplib_qp.id;
qplib_qp->ah.host_sgid_index = qp->qplib_qp.ah.host_sgid_index;
rc = bnxt_qplib_query_qp(&rdev->qplib_res, qplib_qp);
if (rc) {
dev_err(rdev_to_dev(rdev), "Failed to query HW QP");
goto out;
}
qp_attr->qp_state = __to_ib_qp_state(qplib_qp->state);
qp_attr->cur_qp_state = __to_ib_qp_state(qplib_qp->cur_qp_state);
qp_attr->en_sqd_async_notify = qplib_qp->en_sqd_async_notify ? 1 : 0;
qp_attr->qp_access_flags = __to_ib_access_flags(qplib_qp->access);
qp_attr->pkey_index = qplib_qp->pkey_index;
qp_attr->qkey = qplib_qp->qkey;
qp_attr->ah_attr.type = RDMA_AH_ATTR_TYPE_ROCE;
rdma_ah_set_grh(&qp_attr->ah_attr, NULL, qplib_qp->ah.flow_label,
qplib_qp->ah.host_sgid_index,
qplib_qp->ah.hop_limit,
qplib_qp->ah.traffic_class);
rdma_ah_set_dgid_raw(&qp_attr->ah_attr, qplib_qp->ah.dgid.data);
rdma_ah_set_sl(&qp_attr->ah_attr, qplib_qp->ah.sl);
ether_addr_copy(qp_attr->ah_attr.roce.dmac, qplib_qp->ah.dmac);
qp_attr->path_mtu = __to_ib_mtu(qplib_qp->path_mtu);
qp_attr->timeout = qplib_qp->timeout;
qp_attr->retry_cnt = qplib_qp->retry_cnt;
qp_attr->rnr_retry = qplib_qp->rnr_retry;
qp_attr->min_rnr_timer = qplib_qp->min_rnr_timer;
qp_attr->rq_psn = qplib_qp->rq.psn;
qp_attr->max_rd_atomic = qplib_qp->max_rd_atomic;
qp_attr->sq_psn = qplib_qp->sq.psn;
qp_attr->max_dest_rd_atomic = qplib_qp->max_dest_rd_atomic;
qp_init_attr->sq_sig_type = qplib_qp->sig_type ? IB_SIGNAL_ALL_WR :
IB_SIGNAL_REQ_WR;
qp_attr->dest_qp_num = qplib_qp->dest_qpn;
qp_attr->cap.max_send_wr = qp->qplib_qp.sq.max_wqe;
qp_attr->cap.max_send_sge = qp->qplib_qp.sq.max_sge;
qp_attr->cap.max_recv_wr = qp->qplib_qp.rq.max_wqe;
qp_attr->cap.max_recv_sge = qp->qplib_qp.rq.max_sge;
qp_attr->cap.max_inline_data = qp->qplib_qp.max_inline_data;
qp_init_attr->cap = qp_attr->cap;
out:
kfree(qplib_qp);
return rc;
}
/* Routine for sending QP1 packets for RoCE V1 an V2
*/
static int bnxt_re_build_qp1_send_v2(struct bnxt_re_qp *qp,
const struct ib_send_wr *wr,
struct bnxt_qplib_swqe *wqe,
int payload_size)
{
struct bnxt_re_ah *ah = container_of(ud_wr(wr)->ah, struct bnxt_re_ah,
ib_ah);
struct bnxt_qplib_ah *qplib_ah = &ah->qplib_ah;
const struct ib_gid_attr *sgid_attr = ah->ib_ah.sgid_attr;
struct bnxt_qplib_sge sge;
u8 nw_type;
u16 ether_type;
union ib_gid dgid;
bool is_eth = false;
bool is_vlan = false;
bool is_grh = false;
bool is_udp = false;
u8 ip_version = 0;
u16 vlan_id = 0xFFFF;
void *buf;
int i, rc = 0;
memset(&qp->qp1_hdr, 0, sizeof(qp->qp1_hdr));
if (is_vlan_dev(sgid_attr->ndev))
vlan_id = vlan_dev_vlan_id(sgid_attr->ndev);
/* Get network header type for this GID */
nw_type = rdma_gid_attr_network_type(sgid_attr);
switch (nw_type) {
case RDMA_NETWORK_IPV4:
nw_type = BNXT_RE_ROCEV2_IPV4_PACKET;
break;
case RDMA_NETWORK_IPV6:
nw_type = BNXT_RE_ROCEV2_IPV6_PACKET;
break;
default:
nw_type = BNXT_RE_ROCE_V1_PACKET;
break;
}
memcpy(&dgid.raw, &qplib_ah->dgid, 16);
is_udp = sgid_attr->gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP;
if (is_udp) {
if (ipv6_addr_v4mapped((struct in6_addr *)&sgid_attr->gid)) {
ip_version = 4;
ether_type = ETH_P_IP;
} else {
ip_version = 6;
ether_type = ETH_P_IPV6;
}
is_grh = false;
} else {
ether_type = ETH_P_IBOE;
is_grh = true;
}
is_eth = true;
is_vlan = (vlan_id && (vlan_id < 0x1000)) ? true : false;
ib_ud_header_init(payload_size, !is_eth, is_eth, is_vlan, is_grh,
ip_version, is_udp, 0, &qp->qp1_hdr);
/* ETH */
ether_addr_copy(qp->qp1_hdr.eth.dmac_h, ah->qplib_ah.dmac);
ether_addr_copy(qp->qp1_hdr.eth.smac_h, qp->qplib_qp.smac);
/* For vlan, check the sgid for vlan existence */
if (!is_vlan) {
qp->qp1_hdr.eth.type = cpu_to_be16(ether_type);
} else {
qp->qp1_hdr.vlan.type = cpu_to_be16(ether_type);
qp->qp1_hdr.vlan.tag = cpu_to_be16(vlan_id);
}
if (is_grh || (ip_version == 6)) {
memcpy(qp->qp1_hdr.grh.source_gid.raw, sgid_attr->gid.raw,
sizeof(sgid_attr->gid));
memcpy(qp->qp1_hdr.grh.destination_gid.raw, qplib_ah->dgid.data,
sizeof(sgid_attr->gid));
qp->qp1_hdr.grh.hop_limit = qplib_ah->hop_limit;
}
if (ip_version == 4) {
qp->qp1_hdr.ip4.tos = 0;
qp->qp1_hdr.ip4.id = 0;
qp->qp1_hdr.ip4.frag_off = htons(IP_DF);
qp->qp1_hdr.ip4.ttl = qplib_ah->hop_limit;
memcpy(&qp->qp1_hdr.ip4.saddr, sgid_attr->gid.raw + 12, 4);
memcpy(&qp->qp1_hdr.ip4.daddr, qplib_ah->dgid.data + 12, 4);
qp->qp1_hdr.ip4.check = ib_ud_ip4_csum(&qp->qp1_hdr);
}
if (is_udp) {
qp->qp1_hdr.udp.dport = htons(ROCE_V2_UDP_DPORT);
qp->qp1_hdr.udp.sport = htons(0x8CD1);
qp->qp1_hdr.udp.csum = 0;
}
/* BTH */
if (wr->opcode == IB_WR_SEND_WITH_IMM) {
qp->qp1_hdr.bth.opcode = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE;
qp->qp1_hdr.immediate_present = 1;
} else {
qp->qp1_hdr.bth.opcode = IB_OPCODE_UD_SEND_ONLY;
}
if (wr->send_flags & IB_SEND_SOLICITED)
qp->qp1_hdr.bth.solicited_event = 1;
/* pad_count */
qp->qp1_hdr.bth.pad_count = (4 - payload_size) & 3;
/* P_key for QP1 is for all members */
qp->qp1_hdr.bth.pkey = cpu_to_be16(0xFFFF);
qp->qp1_hdr.bth.destination_qpn = IB_QP1;
qp->qp1_hdr.bth.ack_req = 0;
qp->send_psn++;
qp->send_psn &= BTH_PSN_MASK;
qp->qp1_hdr.bth.psn = cpu_to_be32(qp->send_psn);
/* DETH */
/* Use the priviledged Q_Key for QP1 */
qp->qp1_hdr.deth.qkey = cpu_to_be32(IB_QP1_QKEY);
qp->qp1_hdr.deth.source_qpn = IB_QP1;
/* Pack the QP1 to the transmit buffer */
buf = bnxt_qplib_get_qp1_sq_buf(&qp->qplib_qp, &sge);
if (buf) {
ib_ud_header_pack(&qp->qp1_hdr, buf);
for (i = wqe->num_sge; i; i--) {
wqe->sg_list[i].addr = wqe->sg_list[i - 1].addr;
wqe->sg_list[i].lkey = wqe->sg_list[i - 1].lkey;
wqe->sg_list[i].size = wqe->sg_list[i - 1].size;
}
/*
* Max Header buf size for IPV6 RoCE V2 is 86,
* which is same as the QP1 SQ header buffer.
* Header buf size for IPV4 RoCE V2 can be 66.
* ETH(14) + VLAN(4)+ IP(20) + UDP (8) + BTH(20).
* Subtract 20 bytes from QP1 SQ header buf size
*/
if (is_udp && ip_version == 4)
sge.size -= 20;
/*
* Max Header buf size for RoCE V1 is 78.
* ETH(14) + VLAN(4) + GRH(40) + BTH(20).
* Subtract 8 bytes from QP1 SQ header buf size
*/
if (!is_udp)
sge.size -= 8;
/* Subtract 4 bytes for non vlan packets */
if (!is_vlan)
sge.size -= 4;
wqe->sg_list[0].addr = sge.addr;
wqe->sg_list[0].lkey = sge.lkey;
wqe->sg_list[0].size = sge.size;
wqe->num_sge++;
} else {
dev_err(rdev_to_dev(qp->rdev), "QP1 buffer is empty!");
rc = -ENOMEM;
}
return rc;
}
/* For the MAD layer, it only provides the recv SGE the size of
* ib_grh + MAD datagram. No Ethernet headers, Ethertype, BTH, DETH,
* nor RoCE iCRC. The Cu+ solution must provide buffer for the entire
* receive packet (334 bytes) with no VLAN and then copy the GRH
* and the MAD datagram out to the provided SGE.
*/
static int bnxt_re_build_qp1_shadow_qp_recv(struct bnxt_re_qp *qp,
const struct ib_recv_wr *wr,
struct bnxt_qplib_swqe *wqe,
int payload_size)
{
struct bnxt_qplib_sge ref, sge;
u32 rq_prod_index;
struct bnxt_re_sqp_entries *sqp_entry;
rq_prod_index = bnxt_qplib_get_rq_prod_index(&qp->qplib_qp);
if (!bnxt_qplib_get_qp1_rq_buf(&qp->qplib_qp, &sge))
return -ENOMEM;
/* Create 1 SGE to receive the entire
* ethernet packet
*/
/* Save the reference from ULP */
ref.addr = wqe->sg_list[0].addr;
ref.lkey = wqe->sg_list[0].lkey;
ref.size = wqe->sg_list[0].size;
sqp_entry = &qp->rdev->sqp_tbl[rq_prod_index];
/* SGE 1 */
wqe->sg_list[0].addr = sge.addr;
wqe->sg_list[0].lkey = sge.lkey;
wqe->sg_list[0].size = BNXT_QPLIB_MAX_QP1_RQ_HDR_SIZE_V2;
sge.size -= wqe->sg_list[0].size;
sqp_entry->sge.addr = ref.addr;
sqp_entry->sge.lkey = ref.lkey;
sqp_entry->sge.size = ref.size;
/* Store the wrid for reporting completion */
sqp_entry->wrid = wqe->wr_id;
/* change the wqe->wrid to table index */
wqe->wr_id = rq_prod_index;
return 0;
}
static int is_ud_qp(struct bnxt_re_qp *qp)
{
return qp->qplib_qp.type == CMDQ_CREATE_QP_TYPE_UD;
}
static int bnxt_re_build_send_wqe(struct bnxt_re_qp *qp,
const struct ib_send_wr *wr,
struct bnxt_qplib_swqe *wqe)
{
struct bnxt_re_ah *ah = NULL;
if (is_ud_qp(qp)) {
ah = container_of(ud_wr(wr)->ah, struct bnxt_re_ah, ib_ah);
wqe->send.q_key = ud_wr(wr)->remote_qkey;
wqe->send.dst_qp = ud_wr(wr)->remote_qpn;
wqe->send.avid = ah->qplib_ah.id;
}
switch (wr->opcode) {
case IB_WR_SEND:
wqe->type = BNXT_QPLIB_SWQE_TYPE_SEND;
break;
case IB_WR_SEND_WITH_IMM:
wqe->type = BNXT_QPLIB_SWQE_TYPE_SEND_WITH_IMM;
wqe->send.imm_data = wr->ex.imm_data;
break;
case IB_WR_SEND_WITH_INV:
wqe->type = BNXT_QPLIB_SWQE_TYPE_SEND_WITH_INV;
wqe->send.inv_key = wr->ex.invalidate_rkey;
break;
default:
return -EINVAL;
}
if (wr->send_flags & IB_SEND_SIGNALED)
wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SIGNAL_COMP;
if (wr->send_flags & IB_SEND_FENCE)
wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_UC_FENCE;
if (wr->send_flags & IB_SEND_SOLICITED)
wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SOLICIT_EVENT;
if (wr->send_flags & IB_SEND_INLINE)
wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_INLINE;
return 0;
}
static int bnxt_re_build_rdma_wqe(const struct ib_send_wr *wr,
struct bnxt_qplib_swqe *wqe)
{
switch (wr->opcode) {
case IB_WR_RDMA_WRITE:
wqe->type = BNXT_QPLIB_SWQE_TYPE_RDMA_WRITE;
break;
case IB_WR_RDMA_WRITE_WITH_IMM:
wqe->type = BNXT_QPLIB_SWQE_TYPE_RDMA_WRITE_WITH_IMM;
wqe->rdma.imm_data = wr->ex.imm_data;
break;
case IB_WR_RDMA_READ:
wqe->type = BNXT_QPLIB_SWQE_TYPE_RDMA_READ;
wqe->rdma.inv_key = wr->ex.invalidate_rkey;
break;
default:
return -EINVAL;
}
wqe->rdma.remote_va = rdma_wr(wr)->remote_addr;
wqe->rdma.r_key = rdma_wr(wr)->rkey;
if (wr->send_flags & IB_SEND_SIGNALED)
wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SIGNAL_COMP;
if (wr->send_flags & IB_SEND_FENCE)
wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_UC_FENCE;
if (wr->send_flags & IB_SEND_SOLICITED)
wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SOLICIT_EVENT;
if (wr->send_flags & IB_SEND_INLINE)
wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_INLINE;
return 0;
}
static int bnxt_re_build_atomic_wqe(const struct ib_send_wr *wr,
struct bnxt_qplib_swqe *wqe)
{
switch (wr->opcode) {
case IB_WR_ATOMIC_CMP_AND_SWP:
wqe->type = BNXT_QPLIB_SWQE_TYPE_ATOMIC_CMP_AND_SWP;
wqe->atomic.cmp_data = atomic_wr(wr)->compare_add;
wqe->atomic.swap_data = atomic_wr(wr)->swap;
break;
case IB_WR_ATOMIC_FETCH_AND_ADD:
wqe->type = BNXT_QPLIB_SWQE_TYPE_ATOMIC_FETCH_AND_ADD;
wqe->atomic.cmp_data = atomic_wr(wr)->compare_add;
break;
default:
return -EINVAL;
}
wqe->atomic.remote_va = atomic_wr(wr)->remote_addr;
wqe->atomic.r_key = atomic_wr(wr)->rkey;
if (wr->send_flags & IB_SEND_SIGNALED)
wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SIGNAL_COMP;
if (wr->send_flags & IB_SEND_FENCE)
wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_UC_FENCE;
if (wr->send_flags & IB_SEND_SOLICITED)
wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SOLICIT_EVENT;
return 0;
}
static int bnxt_re_build_inv_wqe(const struct ib_send_wr *wr,
struct bnxt_qplib_swqe *wqe)
{
wqe->type = BNXT_QPLIB_SWQE_TYPE_LOCAL_INV;
wqe->local_inv.inv_l_key = wr->ex.invalidate_rkey;
/* Need unconditional fence for local invalidate
* opcode to work as expected.
*/
wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_UC_FENCE;
if (wr->send_flags & IB_SEND_SIGNALED)
wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SIGNAL_COMP;
if (wr->send_flags & IB_SEND_SOLICITED)
wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SOLICIT_EVENT;
return 0;
}
static int bnxt_re_build_reg_wqe(const struct ib_reg_wr *wr,
struct bnxt_qplib_swqe *wqe)
{
struct bnxt_re_mr *mr = container_of(wr->mr, struct bnxt_re_mr, ib_mr);
struct bnxt_qplib_frpl *qplib_frpl = &mr->qplib_frpl;
int access = wr->access;
wqe->frmr.pbl_ptr = (__le64 *)qplib_frpl->hwq.pbl_ptr[0];
wqe->frmr.pbl_dma_ptr = qplib_frpl->hwq.pbl_dma_ptr[0];
wqe->frmr.page_list = mr->pages;
wqe->frmr.page_list_len = mr->npages;
wqe->frmr.levels = qplib_frpl->hwq.level + 1;
wqe->type = BNXT_QPLIB_SWQE_TYPE_REG_MR;
/* Need unconditional fence for reg_mr
* opcode to function as expected.
*/
wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_UC_FENCE;
if (wr->wr.send_flags & IB_SEND_SIGNALED)
wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SIGNAL_COMP;
if (access & IB_ACCESS_LOCAL_WRITE)
wqe->frmr.access_cntl |= SQ_FR_PMR_ACCESS_CNTL_LOCAL_WRITE;
if (access & IB_ACCESS_REMOTE_READ)
wqe->frmr.access_cntl |= SQ_FR_PMR_ACCESS_CNTL_REMOTE_READ;
if (access & IB_ACCESS_REMOTE_WRITE)
wqe->frmr.access_cntl |= SQ_FR_PMR_ACCESS_CNTL_REMOTE_WRITE;
if (access & IB_ACCESS_REMOTE_ATOMIC)
wqe->frmr.access_cntl |= SQ_FR_PMR_ACCESS_CNTL_REMOTE_ATOMIC;
if (access & IB_ACCESS_MW_BIND)
wqe->frmr.access_cntl |= SQ_FR_PMR_ACCESS_CNTL_WINDOW_BIND;
wqe->frmr.l_key = wr->key;
wqe->frmr.length = wr->mr->length;
wqe->frmr.pbl_pg_sz_log = (wr->mr->page_size >> PAGE_SHIFT_4K) - 1;
wqe->frmr.va = wr->mr->iova;
return 0;
}
static int bnxt_re_copy_inline_data(struct bnxt_re_dev *rdev,
const struct ib_send_wr *wr,
struct bnxt_qplib_swqe *wqe)
{
/* Copy the inline data to the data field */
u8 *in_data;
u32 i, sge_len;
void *sge_addr;
in_data = wqe->inline_data;
for (i = 0; i < wr->num_sge; i++) {
sge_addr = (void *)(unsigned long)
wr->sg_list[i].addr;
sge_len = wr->sg_list[i].length;
if ((sge_len + wqe->inline_len) >
BNXT_QPLIB_SWQE_MAX_INLINE_LENGTH) {
dev_err(rdev_to_dev(rdev),
"Inline data size requested > supported value");
return -EINVAL;
}
sge_len = wr->sg_list[i].length;
memcpy(in_data, sge_addr, sge_len);
in_data += wr->sg_list[i].length;
wqe->inline_len += wr->sg_list[i].length;
}
return wqe->inline_len;
}
static int bnxt_re_copy_wr_payload(struct bnxt_re_dev *rdev,
const struct ib_send_wr *wr,
struct bnxt_qplib_swqe *wqe)
{
int payload_sz = 0;
if (wr->send_flags & IB_SEND_INLINE)
payload_sz = bnxt_re_copy_inline_data(rdev, wr, wqe);
else
payload_sz = bnxt_re_build_sgl(wr->sg_list, wqe->sg_list,
wqe->num_sge);
return payload_sz;
}
static void bnxt_ud_qp_hw_stall_workaround(struct bnxt_re_qp *qp)
{
if ((qp->ib_qp.qp_type == IB_QPT_UD ||
qp->ib_qp.qp_type == IB_QPT_GSI ||
qp->ib_qp.qp_type == IB_QPT_RAW_ETHERTYPE) &&
qp->qplib_qp.wqe_cnt == BNXT_RE_UD_QP_HW_STALL) {
int qp_attr_mask;
struct ib_qp_attr qp_attr;
qp_attr_mask = IB_QP_STATE;
qp_attr.qp_state = IB_QPS_RTS;
bnxt_re_modify_qp(&qp->ib_qp, &qp_attr, qp_attr_mask, NULL);
qp->qplib_qp.wqe_cnt = 0;
}
}
static int bnxt_re_post_send_shadow_qp(struct bnxt_re_dev *rdev,
struct bnxt_re_qp *qp,
const struct ib_send_wr *wr)
{
struct bnxt_qplib_swqe wqe;
int rc = 0, payload_sz = 0;
unsigned long flags;
spin_lock_irqsave(&qp->sq_lock, flags);
memset(&wqe, 0, sizeof(wqe));
while (wr) {
/* House keeping */
memset(&wqe, 0, sizeof(wqe));
/* Common */
wqe.num_sge = wr->num_sge;
if (wr->num_sge > qp->qplib_qp.sq.max_sge) {
dev_err(rdev_to_dev(rdev),
"Limit exceeded for Send SGEs");
rc = -EINVAL;
goto bad;
}
payload_sz = bnxt_re_copy_wr_payload(qp->rdev, wr, &wqe);
if (payload_sz < 0) {
rc = -EINVAL;
goto bad;
}
wqe.wr_id = wr->wr_id;
wqe.type = BNXT_QPLIB_SWQE_TYPE_SEND;
rc = bnxt_re_build_send_wqe(qp, wr, &wqe);
if (!rc)
rc = bnxt_qplib_post_send(&qp->qplib_qp, &wqe);
bad:
if (rc) {
dev_err(rdev_to_dev(rdev),
"Post send failed opcode = %#x rc = %d",
wr->opcode, rc);
break;
}
wr = wr->next;
}
bnxt_qplib_post_send_db(&qp->qplib_qp);
bnxt_ud_qp_hw_stall_workaround(qp);
spin_unlock_irqrestore(&qp->sq_lock, flags);
return rc;
}
int bnxt_re_post_send(struct ib_qp *ib_qp, const struct ib_send_wr *wr,
const struct ib_send_wr **bad_wr)
{
struct bnxt_re_qp *qp = container_of(ib_qp, struct bnxt_re_qp, ib_qp);
struct bnxt_qplib_swqe wqe;
int rc = 0, payload_sz = 0;
unsigned long flags;
spin_lock_irqsave(&qp->sq_lock, flags);
while (wr) {
/* House keeping */
memset(&wqe, 0, sizeof(wqe));
/* Common */
wqe.num_sge = wr->num_sge;
if (wr->num_sge > qp->qplib_qp.sq.max_sge) {
dev_err(rdev_to_dev(qp->rdev),
"Limit exceeded for Send SGEs");
rc = -EINVAL;
goto bad;
}
payload_sz = bnxt_re_copy_wr_payload(qp->rdev, wr, &wqe);
if (payload_sz < 0) {
rc = -EINVAL;
goto bad;
}
wqe.wr_id = wr->wr_id;
switch (wr->opcode) {
case IB_WR_SEND:
case IB_WR_SEND_WITH_IMM:
if (ib_qp->qp_type == IB_QPT_GSI) {
rc = bnxt_re_build_qp1_send_v2(qp, wr, &wqe,
payload_sz);
if (rc)
goto bad;
wqe.rawqp1.lflags |=
SQ_SEND_RAWETH_QP1_LFLAGS_ROCE_CRC;
}
switch (wr->send_flags) {
case IB_SEND_IP_CSUM:
wqe.rawqp1.lflags |=
SQ_SEND_RAWETH_QP1_LFLAGS_IP_CHKSUM;
break;
default:
break;
}
/* fall through */
case IB_WR_SEND_WITH_INV:
rc = bnxt_re_build_send_wqe(qp, wr, &wqe);
break;
case IB_WR_RDMA_WRITE:
case IB_WR_RDMA_WRITE_WITH_IMM:
case IB_WR_RDMA_READ:
rc = bnxt_re_build_rdma_wqe(wr, &wqe);
break;
case IB_WR_ATOMIC_CMP_AND_SWP:
case IB_WR_ATOMIC_FETCH_AND_ADD:
rc = bnxt_re_build_atomic_wqe(wr, &wqe);
break;
case IB_WR_RDMA_READ_WITH_INV:
dev_err(rdev_to_dev(qp->rdev),
"RDMA Read with Invalidate is not supported");
rc = -EINVAL;
goto bad;
case IB_WR_LOCAL_INV:
rc = bnxt_re_build_inv_wqe(wr, &wqe);
break;
case IB_WR_REG_MR:
rc = bnxt_re_build_reg_wqe(reg_wr(wr), &wqe);
break;
default:
/* Unsupported WRs */
dev_err(rdev_to_dev(qp->rdev),
"WR (%#x) is not supported", wr->opcode);
rc = -EINVAL;
goto bad;
}
if (!rc)
rc = bnxt_qplib_post_send(&qp->qplib_qp, &wqe);
bad:
if (rc) {
dev_err(rdev_to_dev(qp->rdev),
"post_send failed op:%#x qps = %#x rc = %d\n",
wr->opcode, qp->qplib_qp.state, rc);
*bad_wr = wr;
break;
}
wr = wr->next;
}
bnxt_qplib_post_send_db(&qp->qplib_qp);
bnxt_ud_qp_hw_stall_workaround(qp);
spin_unlock_irqrestore(&qp->sq_lock, flags);
return rc;
}
static int bnxt_re_post_recv_shadow_qp(struct bnxt_re_dev *rdev,
struct bnxt_re_qp *qp,
const struct ib_recv_wr *wr)
{
struct bnxt_qplib_swqe wqe;
int rc = 0;
memset(&wqe, 0, sizeof(wqe));
while (wr) {
/* House keeping */
memset(&wqe, 0, sizeof(wqe));
/* Common */
wqe.num_sge = wr->num_sge;
if (wr->num_sge > qp->qplib_qp.rq.max_sge) {
dev_err(rdev_to_dev(rdev),
"Limit exceeded for Receive SGEs");
rc = -EINVAL;
break;
}
bnxt_re_build_sgl(wr->sg_list, wqe.sg_list, wr->num_sge);
wqe.wr_id = wr->wr_id;
wqe.type = BNXT_QPLIB_SWQE_TYPE_RECV;
rc = bnxt_qplib_post_recv(&qp->qplib_qp, &wqe);
if (rc)
break;
wr = wr->next;
}
if (!rc)
bnxt_qplib_post_recv_db(&qp->qplib_qp);
return rc;
}
int bnxt_re_post_recv(struct ib_qp *ib_qp, const struct ib_recv_wr *wr,
const struct ib_recv_wr **bad_wr)
{
struct bnxt_re_qp *qp = container_of(ib_qp, struct bnxt_re_qp, ib_qp);
struct bnxt_qplib_swqe wqe;
int rc = 0, payload_sz = 0;
unsigned long flags;
u32 count = 0;
spin_lock_irqsave(&qp->rq_lock, flags);
while (wr) {
/* House keeping */
memset(&wqe, 0, sizeof(wqe));
/* Common */
wqe.num_sge = wr->num_sge;
if (wr->num_sge > qp->qplib_qp.rq.max_sge) {
dev_err(rdev_to_dev(qp->rdev),
"Limit exceeded for Receive SGEs");
rc = -EINVAL;
*bad_wr = wr;
break;
}
payload_sz = bnxt_re_build_sgl(wr->sg_list, wqe.sg_list,
wr->num_sge);
wqe.wr_id = wr->wr_id;
wqe.type = BNXT_QPLIB_SWQE_TYPE_RECV;
if (ib_qp->qp_type == IB_QPT_GSI)
rc = bnxt_re_build_qp1_shadow_qp_recv(qp, wr, &wqe,
payload_sz);
if (!rc)
rc = bnxt_qplib_post_recv(&qp->qplib_qp, &wqe);
if (rc) {
*bad_wr = wr;
break;
}
/* Ring DB if the RQEs posted reaches a threshold value */
if (++count >= BNXT_RE_RQ_WQE_THRESHOLD) {
bnxt_qplib_post_recv_db(&qp->qplib_qp);
count = 0;
}
wr = wr->next;
}
if (count)
bnxt_qplib_post_recv_db(&qp->qplib_qp);
spin_unlock_irqrestore(&qp->rq_lock, flags);
return rc;
}
/* Completion Queues */
int bnxt_re_destroy_cq(struct ib_cq *ib_cq)
{
int rc;
struct bnxt_re_cq *cq;
struct bnxt_qplib_nq *nq;
struct bnxt_re_dev *rdev;
cq = container_of(ib_cq, struct bnxt_re_cq, ib_cq);
rdev = cq->rdev;
nq = cq->qplib_cq.nq;
rc = bnxt_qplib_destroy_cq(&rdev->qplib_res, &cq->qplib_cq);
if (rc) {
dev_err(rdev_to_dev(rdev), "Failed to destroy HW CQ");
return rc;
}
if (!IS_ERR_OR_NULL(cq->umem))
ib_umem_release(cq->umem);
atomic_dec(&rdev->cq_count);
nq->budget--;
kfree(cq->cql);
kfree(cq);
return 0;
}
struct ib_cq *bnxt_re_create_cq(struct ib_device *ibdev,
const struct ib_cq_init_attr *attr,
struct ib_ucontext *context,
struct ib_udata *udata)
{
struct bnxt_re_dev *rdev = to_bnxt_re_dev(ibdev, ibdev);
struct bnxt_qplib_dev_attr *dev_attr = &rdev->dev_attr;
struct bnxt_re_cq *cq = NULL;
int rc, entries;
int cqe = attr->cqe;
struct bnxt_qplib_nq *nq = NULL;
unsigned int nq_alloc_cnt;
/* Validate CQ fields */
if (cqe < 1 || cqe > dev_attr->max_cq_wqes) {
dev_err(rdev_to_dev(rdev), "Failed to create CQ -max exceeded");
return ERR_PTR(-EINVAL);
}
cq = kzalloc(sizeof(*cq), GFP_KERNEL);
if (!cq)
return ERR_PTR(-ENOMEM);
cq->rdev = rdev;
cq->qplib_cq.cq_handle = (u64)(unsigned long)(&cq->qplib_cq);
entries = roundup_pow_of_two(cqe + 1);
if (entries > dev_attr->max_cq_wqes + 1)
entries = dev_attr->max_cq_wqes + 1;
if (context) {
struct bnxt_re_cq_req req;
struct bnxt_re_ucontext *uctx = container_of
(context,
struct bnxt_re_ucontext,
ib_uctx);
if (ib_copy_from_udata(&req, udata, sizeof(req))) {
rc = -EFAULT;
goto fail;
}
cq->umem = ib_umem_get(context, req.cq_va,
entries * sizeof(struct cq_base),
IB_ACCESS_LOCAL_WRITE, 1);
if (IS_ERR(cq->umem)) {
rc = PTR_ERR(cq->umem);
goto fail;
}
cq->qplib_cq.sghead = cq->umem->sg_head.sgl;
cq->qplib_cq.nmap = cq->umem->nmap;
cq->qplib_cq.dpi = &uctx->dpi;
} else {
cq->max_cql = min_t(u32, entries, MAX_CQL_PER_POLL);
cq->cql = kcalloc(cq->max_cql, sizeof(struct bnxt_qplib_cqe),
GFP_KERNEL);
if (!cq->cql) {
rc = -ENOMEM;
goto fail;
}
cq->qplib_cq.dpi = &rdev->dpi_privileged;
cq->qplib_cq.sghead = NULL;
cq->qplib_cq.nmap = 0;
}
/*
* Allocating the NQ in a round robin fashion. nq_alloc_cnt is a
* used for getting the NQ index.
*/
nq_alloc_cnt = atomic_inc_return(&rdev->nq_alloc_cnt);
nq = &rdev->nq[nq_alloc_cnt % (rdev->num_msix - 1)];
cq->qplib_cq.max_wqe = entries;
cq->qplib_cq.cnq_hw_ring_id = nq->ring_id;
cq->qplib_cq.nq = nq;
rc = bnxt_qplib_create_cq(&rdev->qplib_res, &cq->qplib_cq);
if (rc) {
dev_err(rdev_to_dev(rdev), "Failed to create HW CQ");
goto fail;
}
cq->ib_cq.cqe = entries;
cq->cq_period = cq->qplib_cq.period;
nq->budget++;
atomic_inc(&rdev->cq_count);
spin_lock_init(&cq->cq_lock);
if (context) {
struct bnxt_re_cq_resp resp;
resp.cqid = cq->qplib_cq.id;
resp.tail = cq->qplib_cq.hwq.cons;
resp.phase = cq->qplib_cq.period;
resp.rsvd = 0;
rc = ib_copy_to_udata(udata, &resp, sizeof(resp));
if (rc) {
dev_err(rdev_to_dev(rdev), "Failed to copy CQ udata");
bnxt_qplib_destroy_cq(&rdev->qplib_res, &cq->qplib_cq);
goto c2fail;
}
}
return &cq->ib_cq;
c2fail:
if (context)
ib_umem_release(cq->umem);
fail:
kfree(cq->cql);
kfree(cq);
return ERR_PTR(rc);
}
static u8 __req_to_ib_wc_status(u8 qstatus)
{
switch (qstatus) {
case CQ_REQ_STATUS_OK:
return IB_WC_SUCCESS;
case CQ_REQ_STATUS_BAD_RESPONSE_ERR:
return IB_WC_BAD_RESP_ERR;
case CQ_REQ_STATUS_LOCAL_LENGTH_ERR:
return IB_WC_LOC_LEN_ERR;
case CQ_REQ_STATUS_LOCAL_QP_OPERATION_ERR:
return IB_WC_LOC_QP_OP_ERR;
case CQ_REQ_STATUS_LOCAL_PROTECTION_ERR:
return IB_WC_LOC_PROT_ERR;
case CQ_REQ_STATUS_MEMORY_MGT_OPERATION_ERR:
return IB_WC_GENERAL_ERR;
case CQ_REQ_STATUS_REMOTE_INVALID_REQUEST_ERR:
return IB_WC_REM_INV_REQ_ERR;
case CQ_REQ_STATUS_REMOTE_ACCESS_ERR:
return IB_WC_REM_ACCESS_ERR;
case CQ_REQ_STATUS_REMOTE_OPERATION_ERR:
return IB_WC_REM_OP_ERR;
case CQ_REQ_STATUS_RNR_NAK_RETRY_CNT_ERR:
return IB_WC_RNR_RETRY_EXC_ERR;
case CQ_REQ_STATUS_TRANSPORT_RETRY_CNT_ERR:
return IB_WC_RETRY_EXC_ERR;
case CQ_REQ_STATUS_WORK_REQUEST_FLUSHED_ERR:
return IB_WC_WR_FLUSH_ERR;
default:
return IB_WC_GENERAL_ERR;
}
return 0;
}
static u8 __rawqp1_to_ib_wc_status(u8 qstatus)
{
switch (qstatus) {
case CQ_RES_RAWETH_QP1_STATUS_OK:
return IB_WC_SUCCESS;
case CQ_RES_RAWETH_QP1_STATUS_LOCAL_ACCESS_ERROR:
return IB_WC_LOC_ACCESS_ERR;
case CQ_RES_RAWETH_QP1_STATUS_HW_LOCAL_LENGTH_ERR:
return IB_WC_LOC_LEN_ERR;
case CQ_RES_RAWETH_QP1_STATUS_LOCAL_PROTECTION_ERR:
return IB_WC_LOC_PROT_ERR;
case CQ_RES_RAWETH_QP1_STATUS_LOCAL_QP_OPERATION_ERR:
return IB_WC_LOC_QP_OP_ERR;
case CQ_RES_RAWETH_QP1_STATUS_MEMORY_MGT_OPERATION_ERR:
return IB_WC_GENERAL_ERR;
case CQ_RES_RAWETH_QP1_STATUS_WORK_REQUEST_FLUSHED_ERR:
return IB_WC_WR_FLUSH_ERR;
case CQ_RES_RAWETH_QP1_STATUS_HW_FLUSH_ERR:
return IB_WC_WR_FLUSH_ERR;
default:
return IB_WC_GENERAL_ERR;
}
}
static u8 __rc_to_ib_wc_status(u8 qstatus)
{
switch (qstatus) {
case CQ_RES_RC_STATUS_OK:
return IB_WC_SUCCESS;
case CQ_RES_RC_STATUS_LOCAL_ACCESS_ERROR:
return IB_WC_LOC_ACCESS_ERR;
case CQ_RES_RC_STATUS_LOCAL_LENGTH_ERR:
return IB_WC_LOC_LEN_ERR;
case CQ_RES_RC_STATUS_LOCAL_PROTECTION_ERR:
return IB_WC_LOC_PROT_ERR;
case CQ_RES_RC_STATUS_LOCAL_QP_OPERATION_ERR:
return IB_WC_LOC_QP_OP_ERR;
case CQ_RES_RC_STATUS_MEMORY_MGT_OPERATION_ERR:
return IB_WC_GENERAL_ERR;
case CQ_RES_RC_STATUS_REMOTE_INVALID_REQUEST_ERR:
return IB_WC_REM_INV_REQ_ERR;
case CQ_RES_RC_STATUS_WORK_REQUEST_FLUSHED_ERR:
return IB_WC_WR_FLUSH_ERR;
case CQ_RES_RC_STATUS_HW_FLUSH_ERR:
return IB_WC_WR_FLUSH_ERR;
default:
return IB_WC_GENERAL_ERR;
}
}
static void bnxt_re_process_req_wc(struct ib_wc *wc, struct bnxt_qplib_cqe *cqe)
{
switch (cqe->type) {
case BNXT_QPLIB_SWQE_TYPE_SEND:
wc->opcode = IB_WC_SEND;
break;
case BNXT_QPLIB_SWQE_TYPE_SEND_WITH_IMM:
wc->opcode = IB_WC_SEND;
wc->wc_flags |= IB_WC_WITH_IMM;
break;
case BNXT_QPLIB_SWQE_TYPE_SEND_WITH_INV:
wc->opcode = IB_WC_SEND;
wc->wc_flags |= IB_WC_WITH_INVALIDATE;
break;
case BNXT_QPLIB_SWQE_TYPE_RDMA_WRITE:
wc->opcode = IB_WC_RDMA_WRITE;
break;
case BNXT_QPLIB_SWQE_TYPE_RDMA_WRITE_WITH_IMM:
wc->opcode = IB_WC_RDMA_WRITE;
wc->wc_flags |= IB_WC_WITH_IMM;
break;
case BNXT_QPLIB_SWQE_TYPE_RDMA_READ:
wc->opcode = IB_WC_RDMA_READ;
break;
case BNXT_QPLIB_SWQE_TYPE_ATOMIC_CMP_AND_SWP:
wc->opcode = IB_WC_COMP_SWAP;
break;
case BNXT_QPLIB_SWQE_TYPE_ATOMIC_FETCH_AND_ADD:
wc->opcode = IB_WC_FETCH_ADD;
break;
case BNXT_QPLIB_SWQE_TYPE_LOCAL_INV:
wc->opcode = IB_WC_LOCAL_INV;
break;
case BNXT_QPLIB_SWQE_TYPE_REG_MR:
wc->opcode = IB_WC_REG_MR;
break;
default:
wc->opcode = IB_WC_SEND;
break;
}
wc->status = __req_to_ib_wc_status(cqe->status);
}
static int bnxt_re_check_packet_type(u16 raweth_qp1_flags,
u16 raweth_qp1_flags2)
{
bool is_ipv6 = false, is_ipv4 = false;
/* raweth_qp1_flags Bit 9-6 indicates itype */
if ((raweth_qp1_flags & CQ_RES_RAWETH_QP1_RAWETH_QP1_FLAGS_ITYPE_ROCE)
!= CQ_RES_RAWETH_QP1_RAWETH_QP1_FLAGS_ITYPE_ROCE)
return -1;
if (raweth_qp1_flags2 &
CQ_RES_RAWETH_QP1_RAWETH_QP1_FLAGS2_IP_CS_CALC &&
raweth_qp1_flags2 &
CQ_RES_RAWETH_QP1_RAWETH_QP1_FLAGS2_L4_CS_CALC) {
/* raweth_qp1_flags2 Bit 8 indicates ip_type. 0-v4 1 - v6 */
(raweth_qp1_flags2 &
CQ_RES_RAWETH_QP1_RAWETH_QP1_FLAGS2_IP_TYPE) ?
(is_ipv6 = true) : (is_ipv4 = true);
return ((is_ipv6) ?
BNXT_RE_ROCEV2_IPV6_PACKET :
BNXT_RE_ROCEV2_IPV4_PACKET);
} else {
return BNXT_RE_ROCE_V1_PACKET;
}
}
static int bnxt_re_to_ib_nw_type(int nw_type)
{
u8 nw_hdr_type = 0xFF;
switch (nw_type) {
case BNXT_RE_ROCE_V1_PACKET:
nw_hdr_type = RDMA_NETWORK_ROCE_V1;
break;
case BNXT_RE_ROCEV2_IPV4_PACKET:
nw_hdr_type = RDMA_NETWORK_IPV4;
break;
case BNXT_RE_ROCEV2_IPV6_PACKET:
nw_hdr_type = RDMA_NETWORK_IPV6;
break;
}
return nw_hdr_type;
}
static bool bnxt_re_is_loopback_packet(struct bnxt_re_dev *rdev,
void *rq_hdr_buf)
{
u8 *tmp_buf = NULL;
struct ethhdr *eth_hdr;
u16 eth_type;
bool rc = false;
tmp_buf = (u8 *)rq_hdr_buf;
/*
* If dest mac is not same as I/F mac, this could be a
* loopback address or multicast address, check whether
* it is a loopback packet
*/
if (!ether_addr_equal(tmp_buf, rdev->netdev->dev_addr)) {
tmp_buf += 4;
/* Check the ether type */
eth_hdr = (struct ethhdr *)tmp_buf;
eth_type = ntohs(eth_hdr->h_proto);
switch (eth_type) {
case ETH_P_IBOE:
rc = true;
break;
case ETH_P_IP:
case ETH_P_IPV6: {
u32 len;
struct udphdr *udp_hdr;
len = (eth_type == ETH_P_IP ? sizeof(struct iphdr) :
sizeof(struct ipv6hdr));
tmp_buf += sizeof(struct ethhdr) + len;
udp_hdr = (struct udphdr *)tmp_buf;
if (ntohs(udp_hdr->dest) ==
ROCE_V2_UDP_DPORT)
rc = true;
break;
}
default:
break;
}
}
return rc;
}
static int bnxt_re_process_raw_qp_pkt_rx(struct bnxt_re_qp *qp1_qp,
struct bnxt_qplib_cqe *cqe)
{
struct bnxt_re_dev *rdev = qp1_qp->rdev;
struct bnxt_re_sqp_entries *sqp_entry = NULL;
struct bnxt_re_qp *qp = rdev->qp1_sqp;
struct ib_send_wr *swr;
struct ib_ud_wr udwr;
struct ib_recv_wr rwr;
int pkt_type = 0;
u32 tbl_idx;
void *rq_hdr_buf;
dma_addr_t rq_hdr_buf_map;
dma_addr_t shrq_hdr_buf_map;
u32 offset = 0;
u32 skip_bytes = 0;
struct ib_sge s_sge[2];
struct ib_sge r_sge[2];
int rc;
memset(&udwr, 0, sizeof(udwr));
memset(&rwr, 0, sizeof(rwr));
memset(&s_sge, 0, sizeof(s_sge));
memset(&r_sge, 0, sizeof(r_sge));
swr = &udwr.wr;
tbl_idx = cqe->wr_id;
rq_hdr_buf = qp1_qp->qplib_qp.rq_hdr_buf +
(tbl_idx * qp1_qp->qplib_qp.rq_hdr_buf_size);
rq_hdr_buf_map = bnxt_qplib_get_qp_buf_from_index(&qp1_qp->qplib_qp,
tbl_idx);
/* Shadow QP header buffer */
shrq_hdr_buf_map = bnxt_qplib_get_qp_buf_from_index(&qp->qplib_qp,
tbl_idx);
sqp_entry = &rdev->sqp_tbl[tbl_idx];
/* Store this cqe */
memcpy(&sqp_entry->cqe, cqe, sizeof(struct bnxt_qplib_cqe));
sqp_entry->qp1_qp = qp1_qp;
/* Find packet type from the cqe */
pkt_type = bnxt_re_check_packet_type(cqe->raweth_qp1_flags,
cqe->raweth_qp1_flags2);
if (pkt_type < 0) {
dev_err(rdev_to_dev(rdev), "Invalid packet\n");
return -EINVAL;
}
/* Adjust the offset for the user buffer and post in the rq */
if (pkt_type == BNXT_RE_ROCEV2_IPV4_PACKET)
offset = 20;
/*
* QP1 loopback packet has 4 bytes of internal header before
* ether header. Skip these four bytes.
*/
if (bnxt_re_is_loopback_packet(rdev, rq_hdr_buf))
skip_bytes = 4;
/* First send SGE . Skip the ether header*/
s_sge[0].addr = rq_hdr_buf_map + BNXT_QPLIB_MAX_QP1_RQ_ETH_HDR_SIZE
+ skip_bytes;
s_sge[0].lkey = 0xFFFFFFFF;
s_sge[0].length = offset ? BNXT_QPLIB_MAX_GRH_HDR_SIZE_IPV4 :
BNXT_QPLIB_MAX_GRH_HDR_SIZE_IPV6;
/* Second Send SGE */
s_sge[1].addr = s_sge[0].addr + s_sge[0].length +
BNXT_QPLIB_MAX_QP1_RQ_BDETH_HDR_SIZE;
if (pkt_type != BNXT_RE_ROCE_V1_PACKET)
s_sge[1].addr += 8;
s_sge[1].lkey = 0xFFFFFFFF;
s_sge[1].length = 256;
/* First recv SGE */
r_sge[0].addr = shrq_hdr_buf_map;
r_sge[0].lkey = 0xFFFFFFFF;
r_sge[0].length = 40;
r_sge[1].addr = sqp_entry->sge.addr + offset;
r_sge[1].lkey = sqp_entry->sge.lkey;
r_sge[1].length = BNXT_QPLIB_MAX_GRH_HDR_SIZE_IPV6 + 256 - offset;
/* Create receive work request */
rwr.num_sge = 2;
rwr.sg_list = r_sge;
rwr.wr_id = tbl_idx;
rwr.next = NULL;
rc = bnxt_re_post_recv_shadow_qp(rdev, qp, &rwr);
if (rc) {
dev_err(rdev_to_dev(rdev),
"Failed to post Rx buffers to shadow QP");
return -ENOMEM;
}
swr->num_sge = 2;
swr->sg_list = s_sge;
swr->wr_id = tbl_idx;
swr->opcode = IB_WR_SEND;
swr->next = NULL;
udwr.ah = &rdev->sqp_ah->ib_ah;
udwr.remote_qpn = rdev->qp1_sqp->qplib_qp.id;
udwr.remote_qkey = rdev->qp1_sqp->qplib_qp.qkey;
/* post data received in the send queue */
rc = bnxt_re_post_send_shadow_qp(rdev, qp, swr);
return 0;
}
static void bnxt_re_process_res_rawqp1_wc(struct ib_wc *wc,
struct bnxt_qplib_cqe *cqe)
{
wc->opcode = IB_WC_RECV;
wc->status = __rawqp1_to_ib_wc_status(cqe->status);
wc->wc_flags |= IB_WC_GRH;
}
static bool bnxt_re_check_if_vlan_valid(struct bnxt_re_dev *rdev,
u16 vlan_id)
{
/*
* Check if the vlan is configured in the host. If not configured, it
* can be a transparent VLAN. So dont report the vlan id.
*/
if (!__vlan_find_dev_deep_rcu(rdev->netdev,
htons(ETH_P_8021Q), vlan_id))
return false;
return true;
}
static bool bnxt_re_is_vlan_pkt(struct bnxt_qplib_cqe *orig_cqe,
u16 *vid, u8 *sl)
{
bool ret = false;
u32 metadata;
u16 tpid;
metadata = orig_cqe->raweth_qp1_metadata;
if (orig_cqe->raweth_qp1_flags2 &
CQ_RES_RAWETH_QP1_RAWETH_QP1_FLAGS2_META_FORMAT_VLAN) {
tpid = ((metadata &
CQ_RES_RAWETH_QP1_RAWETH_QP1_METADATA_TPID_MASK) >>
CQ_RES_RAWETH_QP1_RAWETH_QP1_METADATA_TPID_SFT);
if (tpid == ETH_P_8021Q) {
*vid = metadata &
CQ_RES_RAWETH_QP1_RAWETH_QP1_METADATA_VID_MASK;
*sl = (metadata &
CQ_RES_RAWETH_QP1_RAWETH_QP1_METADATA_PRI_MASK) >>
CQ_RES_RAWETH_QP1_RAWETH_QP1_METADATA_PRI_SFT;
ret = true;
}
}
return ret;
}
static void bnxt_re_process_res_rc_wc(struct ib_wc *wc,
struct bnxt_qplib_cqe *cqe)
{
wc->opcode = IB_WC_RECV;
wc->status = __rc_to_ib_wc_status(cqe->status);
if (cqe->flags & CQ_RES_RC_FLAGS_IMM)
wc->wc_flags |= IB_WC_WITH_IMM;
if (cqe->flags & CQ_RES_RC_FLAGS_INV)
wc->wc_flags |= IB_WC_WITH_INVALIDATE;
if ((cqe->flags & (CQ_RES_RC_FLAGS_RDMA | CQ_RES_RC_FLAGS_IMM)) ==
(CQ_RES_RC_FLAGS_RDMA | CQ_RES_RC_FLAGS_IMM))
wc->opcode = IB_WC_RECV_RDMA_WITH_IMM;
}
static void bnxt_re_process_res_shadow_qp_wc(struct bnxt_re_qp *qp,
struct ib_wc *wc,
struct bnxt_qplib_cqe *cqe)
{
struct bnxt_re_dev *rdev = qp->rdev;
struct bnxt_re_qp *qp1_qp = NULL;
struct bnxt_qplib_cqe *orig_cqe = NULL;
struct bnxt_re_sqp_entries *sqp_entry = NULL;
int nw_type;
u32 tbl_idx;
u16 vlan_id;
u8 sl;
tbl_idx = cqe->wr_id;
sqp_entry = &rdev->sqp_tbl[tbl_idx];
qp1_qp = sqp_entry->qp1_qp;
orig_cqe = &sqp_entry->cqe;
wc->wr_id = sqp_entry->wrid;
wc->byte_len = orig_cqe->length;
wc->qp = &qp1_qp->ib_qp;
wc->ex.imm_data = orig_cqe->immdata;
wc->src_qp = orig_cqe->src_qp;
memcpy(wc->smac, orig_cqe->smac, ETH_ALEN);
if (bnxt_re_is_vlan_pkt(orig_cqe, &vlan_id, &sl)) {
if (bnxt_re_check_if_vlan_valid(rdev, vlan_id)) {
wc->vlan_id = vlan_id;
wc->sl = sl;
wc->wc_flags |= IB_WC_WITH_VLAN;
}
}
wc->port_num = 1;
wc->vendor_err = orig_cqe->status;
wc->opcode = IB_WC_RECV;
wc->status = __rawqp1_to_ib_wc_status(orig_cqe->status);
wc->wc_flags |= IB_WC_GRH;
nw_type = bnxt_re_check_packet_type(orig_cqe->raweth_qp1_flags,
orig_cqe->raweth_qp1_flags2);
if (nw_type >= 0) {
wc->network_hdr_type = bnxt_re_to_ib_nw_type(nw_type);
wc->wc_flags |= IB_WC_WITH_NETWORK_HDR_TYPE;
}
}
static void bnxt_re_process_res_ud_wc(struct ib_wc *wc,
struct bnxt_qplib_cqe *cqe)
{
wc->opcode = IB_WC_RECV;
wc->status = __rc_to_ib_wc_status(cqe->status);
if (cqe->flags & CQ_RES_RC_FLAGS_IMM)
wc->wc_flags |= IB_WC_WITH_IMM;
if (cqe->flags & CQ_RES_RC_FLAGS_INV)
wc->wc_flags |= IB_WC_WITH_INVALIDATE;
if ((cqe->flags & (CQ_RES_RC_FLAGS_RDMA | CQ_RES_RC_FLAGS_IMM)) ==
(CQ_RES_RC_FLAGS_RDMA | CQ_RES_RC_FLAGS_IMM))
wc->opcode = IB_WC_RECV_RDMA_WITH_IMM;
}
static int send_phantom_wqe(struct bnxt_re_qp *qp)
{
struct bnxt_qplib_qp *lib_qp = &qp->qplib_qp;
unsigned long flags;
int rc = 0;
spin_lock_irqsave(&qp->sq_lock, flags);
rc = bnxt_re_bind_fence_mw(lib_qp);
if (!rc) {
lib_qp->sq.phantom_wqe_cnt++;
dev_dbg(&lib_qp->sq.hwq.pdev->dev,
"qp %#x sq->prod %#x sw_prod %#x phantom_wqe_cnt %d\n",
lib_qp->id, lib_qp->sq.hwq.prod,
HWQ_CMP(lib_qp->sq.hwq.prod, &lib_qp->sq.hwq),
lib_qp->sq.phantom_wqe_cnt);
}
spin_unlock_irqrestore(&qp->sq_lock, flags);
return rc;
}
int bnxt_re_poll_cq(struct ib_cq *ib_cq, int num_entries, struct ib_wc *wc)
{
struct bnxt_re_cq *cq = container_of(ib_cq, struct bnxt_re_cq, ib_cq);
struct bnxt_re_qp *qp;
struct bnxt_qplib_cqe *cqe;
int i, ncqe, budget;
struct bnxt_qplib_q *sq;
struct bnxt_qplib_qp *lib_qp;
u32 tbl_idx;
struct bnxt_re_sqp_entries *sqp_entry = NULL;
unsigned long flags;
spin_lock_irqsave(&cq->cq_lock, flags);
budget = min_t(u32, num_entries, cq->max_cql);
num_entries = budget;
if (!cq->cql) {
dev_err(rdev_to_dev(cq->rdev), "POLL CQ : no CQL to use");
goto exit;
}
cqe = &cq->cql[0];
while (budget) {
lib_qp = NULL;
ncqe = bnxt_qplib_poll_cq(&cq->qplib_cq, cqe, budget, &lib_qp);
if (lib_qp) {
sq = &lib_qp->sq;
if (sq->send_phantom) {
qp = container_of(lib_qp,
struct bnxt_re_qp, qplib_qp);
if (send_phantom_wqe(qp) == -ENOMEM)
dev_err(rdev_to_dev(cq->rdev),
"Phantom failed! Scheduled to send again\n");
else
sq->send_phantom = false;
}
}
if (ncqe < budget)
ncqe += bnxt_qplib_process_flush_list(&cq->qplib_cq,
cqe + ncqe,
budget - ncqe);
if (!ncqe)
break;
for (i = 0; i < ncqe; i++, cqe++) {
/* Transcribe each qplib_wqe back to ib_wc */
memset(wc, 0, sizeof(*wc));
wc->wr_id = cqe->wr_id;
wc->byte_len = cqe->length;
qp = container_of
((struct bnxt_qplib_qp *)
(unsigned long)(cqe->qp_handle),
struct bnxt_re_qp, qplib_qp);
if (!qp) {
dev_err(rdev_to_dev(cq->rdev),
"POLL CQ : bad QP handle");
continue;
}
wc->qp = &qp->ib_qp;
wc->ex.imm_data = cqe->immdata;
wc->src_qp = cqe->src_qp;
memcpy(wc->smac, cqe->smac, ETH_ALEN);
wc->port_num = 1;
wc->vendor_err = cqe->status;
switch (cqe->opcode) {
case CQ_BASE_CQE_TYPE_REQ:
if (qp->qplib_qp.id ==
qp->rdev->qp1_sqp->qplib_qp.id) {
/* Handle this completion with
* the stored completion
*/
memset(wc, 0, sizeof(*wc));
continue;
}
bnxt_re_process_req_wc(wc, cqe);
break;
case CQ_BASE_CQE_TYPE_RES_RAWETH_QP1:
if (!cqe->status) {
int rc = 0;
rc = bnxt_re_process_raw_qp_pkt_rx
(qp, cqe);
if (!rc) {
memset(wc, 0, sizeof(*wc));
continue;
}
cqe->status = -1;
}
/* Errors need not be looped back.
* But change the wr_id to the one
* stored in the table
*/
tbl_idx = cqe->wr_id;
sqp_entry = &cq->rdev->sqp_tbl[tbl_idx];
wc->wr_id = sqp_entry->wrid;
bnxt_re_process_res_rawqp1_wc(wc, cqe);
break;
case CQ_BASE_CQE_TYPE_RES_RC:
bnxt_re_process_res_rc_wc(wc, cqe);
break;
case CQ_BASE_CQE_TYPE_RES_UD:
if (qp->qplib_qp.id ==
qp->rdev->qp1_sqp->qplib_qp.id) {
/* Handle this completion with
* the stored completion
*/
if (cqe->status) {
continue;
} else {
bnxt_re_process_res_shadow_qp_wc
(qp, wc, cqe);
break;
}
}
bnxt_re_process_res_ud_wc(wc, cqe);
break;
default:
dev_err(rdev_to_dev(cq->rdev),
"POLL CQ : type 0x%x not handled",
cqe->opcode);
continue;
}
wc++;
budget--;
}
}
exit:
spin_unlock_irqrestore(&cq->cq_lock, flags);
return num_entries - budget;
}
int bnxt_re_req_notify_cq(struct ib_cq *ib_cq,
enum ib_cq_notify_flags ib_cqn_flags)
{
struct bnxt_re_cq *cq = container_of(ib_cq, struct bnxt_re_cq, ib_cq);
int type = 0, rc = 0;
unsigned long flags;
spin_lock_irqsave(&cq->cq_lock, flags);
/* Trigger on the very next completion */
if (ib_cqn_flags & IB_CQ_NEXT_COMP)
type = DBR_DBR_TYPE_CQ_ARMALL;
/* Trigger on the next solicited completion */
else if (ib_cqn_flags & IB_CQ_SOLICITED)
type = DBR_DBR_TYPE_CQ_ARMSE;
/* Poll to see if there are missed events */
if ((ib_cqn_flags & IB_CQ_REPORT_MISSED_EVENTS) &&
!(bnxt_qplib_is_cq_empty(&cq->qplib_cq))) {
rc = 1;
goto exit;
}
bnxt_qplib_req_notify_cq(&cq->qplib_cq, type);
exit:
spin_unlock_irqrestore(&cq->cq_lock, flags);
return rc;
}
/* Memory Regions */
struct ib_mr *bnxt_re_get_dma_mr(struct ib_pd *ib_pd, int mr_access_flags)
{
struct bnxt_re_pd *pd = container_of(ib_pd, struct bnxt_re_pd, ib_pd);
struct bnxt_re_dev *rdev = pd->rdev;
struct bnxt_re_mr *mr;
u64 pbl = 0;
int rc;
mr = kzalloc(sizeof(*mr), GFP_KERNEL);
if (!mr)
return ERR_PTR(-ENOMEM);
mr->rdev = rdev;
mr->qplib_mr.pd = &pd->qplib_pd;
mr->qplib_mr.flags = __from_ib_access_flags(mr_access_flags);
mr->qplib_mr.type = CMDQ_ALLOCATE_MRW_MRW_FLAGS_PMR;
/* Allocate and register 0 as the address */
rc = bnxt_qplib_alloc_mrw(&rdev->qplib_res, &mr->qplib_mr);
if (rc)
goto fail;
mr->qplib_mr.hwq.level = PBL_LVL_MAX;
mr->qplib_mr.total_size = -1; /* Infinte length */
rc = bnxt_qplib_reg_mr(&rdev->qplib_res, &mr->qplib_mr, &pbl, 0, false,
PAGE_SIZE);
if (rc)
goto fail_mr;
mr->ib_mr.lkey = mr->qplib_mr.lkey;
if (mr_access_flags & (IB_ACCESS_REMOTE_WRITE | IB_ACCESS_REMOTE_READ |
IB_ACCESS_REMOTE_ATOMIC))
mr->ib_mr.rkey = mr->ib_mr.lkey;
atomic_inc(&rdev->mr_count);
return &mr->ib_mr;
fail_mr:
bnxt_qplib_free_mrw(&rdev->qplib_res, &mr->qplib_mr);
fail:
kfree(mr);
return ERR_PTR(rc);
}
int bnxt_re_dereg_mr(struct ib_mr *ib_mr)
{
struct bnxt_re_mr *mr = container_of(ib_mr, struct bnxt_re_mr, ib_mr);
struct bnxt_re_dev *rdev = mr->rdev;
int rc;
rc = bnxt_qplib_free_mrw(&rdev->qplib_res, &mr->qplib_mr);
if (rc) {
dev_err(rdev_to_dev(rdev), "Dereg MR failed: %#x\n", rc);
return rc;
}
if (mr->pages) {
rc = bnxt_qplib_free_fast_reg_page_list(&rdev->qplib_res,
&mr->qplib_frpl);
kfree(mr->pages);
mr->npages = 0;
mr->pages = NULL;
}
if (!IS_ERR_OR_NULL(mr->ib_umem))
ib_umem_release(mr->ib_umem);
kfree(mr);
atomic_dec(&rdev->mr_count);
return rc;
}
static int bnxt_re_set_page(struct ib_mr *ib_mr, u64 addr)
{
struct bnxt_re_mr *mr = container_of(ib_mr, struct bnxt_re_mr, ib_mr);
if (unlikely(mr->npages == mr->qplib_frpl.max_pg_ptrs))
return -ENOMEM;
mr->pages[mr->npages++] = addr;
return 0;
}
int bnxt_re_map_mr_sg(struct ib_mr *ib_mr, struct scatterlist *sg, int sg_nents,
unsigned int *sg_offset)
{
struct bnxt_re_mr *mr = container_of(ib_mr, struct bnxt_re_mr, ib_mr);
mr->npages = 0;
return ib_sg_to_pages(ib_mr, sg, sg_nents, sg_offset, bnxt_re_set_page);
}
struct ib_mr *bnxt_re_alloc_mr(struct ib_pd *ib_pd, enum ib_mr_type type,
u32 max_num_sg)
{
struct bnxt_re_pd *pd = container_of(ib_pd, struct bnxt_re_pd, ib_pd);
struct bnxt_re_dev *rdev = pd->rdev;
struct bnxt_re_mr *mr = NULL;
int rc;
if (type != IB_MR_TYPE_MEM_REG) {
dev_dbg(rdev_to_dev(rdev), "MR type 0x%x not supported", type);
return ERR_PTR(-EINVAL);
}
if (max_num_sg > MAX_PBL_LVL_1_PGS)
return ERR_PTR(-EINVAL);
mr = kzalloc(sizeof(*mr), GFP_KERNEL);
if (!mr)
return ERR_PTR(-ENOMEM);
mr->rdev = rdev;
mr->qplib_mr.pd = &pd->qplib_pd;
mr->qplib_mr.flags = BNXT_QPLIB_FR_PMR;
mr->qplib_mr.type = CMDQ_ALLOCATE_MRW_MRW_FLAGS_PMR;
rc = bnxt_qplib_alloc_mrw(&rdev->qplib_res, &mr->qplib_mr);
if (rc)
goto bail;
mr->ib_mr.lkey = mr->qplib_mr.lkey;
mr->ib_mr.rkey = mr->ib_mr.lkey;
mr->pages = kcalloc(max_num_sg, sizeof(u64), GFP_KERNEL);
if (!mr->pages) {
rc = -ENOMEM;
goto fail;
}
rc = bnxt_qplib_alloc_fast_reg_page_list(&rdev->qplib_res,
&mr->qplib_frpl, max_num_sg);
if (rc) {
dev_err(rdev_to_dev(rdev),
"Failed to allocate HW FR page list");
goto fail_mr;
}
atomic_inc(&rdev->mr_count);
return &mr->ib_mr;
fail_mr:
kfree(mr->pages);
fail:
bnxt_qplib_free_mrw(&rdev->qplib_res, &mr->qplib_mr);
bail:
kfree(mr);
return ERR_PTR(rc);
}
struct ib_mw *bnxt_re_alloc_mw(struct ib_pd *ib_pd, enum ib_mw_type type,
struct ib_udata *udata)
{
struct bnxt_re_pd *pd = container_of(ib_pd, struct bnxt_re_pd, ib_pd);
struct bnxt_re_dev *rdev = pd->rdev;
struct bnxt_re_mw *mw;
int rc;
mw = kzalloc(sizeof(*mw), GFP_KERNEL);
if (!mw)
return ERR_PTR(-ENOMEM);
mw->rdev = rdev;
mw->qplib_mw.pd = &pd->qplib_pd;
mw->qplib_mw.type = (type == IB_MW_TYPE_1 ?
CMDQ_ALLOCATE_MRW_MRW_FLAGS_MW_TYPE1 :
CMDQ_ALLOCATE_MRW_MRW_FLAGS_MW_TYPE2B);
rc = bnxt_qplib_alloc_mrw(&rdev->qplib_res, &mw->qplib_mw);
if (rc) {
dev_err(rdev_to_dev(rdev), "Allocate MW failed!");
goto fail;
}
mw->ib_mw.rkey = mw->qplib_mw.rkey;
atomic_inc(&rdev->mw_count);
return &mw->ib_mw;
fail:
kfree(mw);
return ERR_PTR(rc);
}
int bnxt_re_dealloc_mw(struct ib_mw *ib_mw)
{
struct bnxt_re_mw *mw = container_of(ib_mw, struct bnxt_re_mw, ib_mw);
struct bnxt_re_dev *rdev = mw->rdev;
int rc;
rc = bnxt_qplib_free_mrw(&rdev->qplib_res, &mw->qplib_mw);
if (rc) {
dev_err(rdev_to_dev(rdev), "Free MW failed: %#x\n", rc);
return rc;
}
kfree(mw);
atomic_dec(&rdev->mw_count);
return rc;
}
static int bnxt_re_page_size_ok(int page_shift)
{
switch (page_shift) {
case CMDQ_REGISTER_MR_LOG2_PBL_PG_SIZE_PG_4K:
case CMDQ_REGISTER_MR_LOG2_PBL_PG_SIZE_PG_8K:
case CMDQ_REGISTER_MR_LOG2_PBL_PG_SIZE_PG_64K:
case CMDQ_REGISTER_MR_LOG2_PBL_PG_SIZE_PG_2M:
case CMDQ_REGISTER_MR_LOG2_PBL_PG_SIZE_PG_256K:
case CMDQ_REGISTER_MR_LOG2_PBL_PG_SIZE_PG_1M:
case CMDQ_REGISTER_MR_LOG2_PBL_PG_SIZE_PG_4M:
case CMDQ_REGISTER_MR_LOG2_PBL_PG_SIZE_PG_1G:
return 1;
default:
return 0;
}
}
static int fill_umem_pbl_tbl(struct ib_umem *umem, u64 *pbl_tbl_orig,
int page_shift)
{
u64 *pbl_tbl = pbl_tbl_orig;
u64 paddr;
u64 page_mask = (1ULL << page_shift) - 1;
int i, pages;
struct scatterlist *sg;
int entry;
for_each_sg(umem->sg_head.sgl, sg, umem->nmap, entry) {
pages = sg_dma_len(sg) >> PAGE_SHIFT;
for (i = 0; i < pages; i++) {
paddr = sg_dma_address(sg) + (i << PAGE_SHIFT);
if (pbl_tbl == pbl_tbl_orig)
*pbl_tbl++ = paddr & ~page_mask;
else if ((paddr & page_mask) == 0)
*pbl_tbl++ = paddr;
}
}
return pbl_tbl - pbl_tbl_orig;
}
/* uverbs */
struct ib_mr *bnxt_re_reg_user_mr(struct ib_pd *ib_pd, u64 start, u64 length,
u64 virt_addr, int mr_access_flags,
struct ib_udata *udata)
{
struct bnxt_re_pd *pd = container_of(ib_pd, struct bnxt_re_pd, ib_pd);
struct bnxt_re_dev *rdev = pd->rdev;
struct bnxt_re_mr *mr;
struct ib_umem *umem;
u64 *pbl_tbl = NULL;
int umem_pgs, page_shift, rc;
if (length > BNXT_RE_MAX_MR_SIZE) {
dev_err(rdev_to_dev(rdev), "MR Size: %lld > Max supported:%lld\n",
length, BNXT_RE_MAX_MR_SIZE);
return ERR_PTR(-ENOMEM);
}
mr = kzalloc(sizeof(*mr), GFP_KERNEL);
if (!mr)
return ERR_PTR(-ENOMEM);
mr->rdev = rdev;
mr->qplib_mr.pd = &pd->qplib_pd;
mr->qplib_mr.flags = __from_ib_access_flags(mr_access_flags);
mr->qplib_mr.type = CMDQ_ALLOCATE_MRW_MRW_FLAGS_MR;
rc = bnxt_qplib_alloc_mrw(&rdev->qplib_res, &mr->qplib_mr);
if (rc) {
dev_err(rdev_to_dev(rdev), "Failed to allocate MR");
goto free_mr;
}
/* The fixed portion of the rkey is the same as the lkey */
mr->ib_mr.rkey = mr->qplib_mr.rkey;
umem = ib_umem_get(ib_pd->uobject->context, start, length,
mr_access_flags, 0);
if (IS_ERR(umem)) {
dev_err(rdev_to_dev(rdev), "Failed to get umem");
rc = -EFAULT;
goto free_mrw;
}
mr->ib_umem = umem;
mr->qplib_mr.va = virt_addr;
umem_pgs = ib_umem_page_count(umem);
if (!umem_pgs) {
dev_err(rdev_to_dev(rdev), "umem is invalid!");
rc = -EINVAL;
goto free_umem;
}
mr->qplib_mr.total_size = length;
pbl_tbl = kcalloc(umem_pgs, sizeof(u64 *), GFP_KERNEL);
if (!pbl_tbl) {
rc = -ENOMEM;
goto free_umem;
}
page_shift = umem->page_shift;
if (!bnxt_re_page_size_ok(page_shift)) {
dev_err(rdev_to_dev(rdev), "umem page size unsupported!");
rc = -EFAULT;
goto fail;
}
if (!umem->hugetlb && length > BNXT_RE_MAX_MR_SIZE_LOW) {
dev_err(rdev_to_dev(rdev), "Requested MR Sz:%llu Max sup:%llu",
length, (u64)BNXT_RE_MAX_MR_SIZE_LOW);
rc = -EINVAL;
goto fail;
}
if (umem->hugetlb && length > BNXT_RE_PAGE_SIZE_2M) {
page_shift = BNXT_RE_PAGE_SHIFT_2M;
dev_warn(rdev_to_dev(rdev), "umem hugetlb set page_size %x",
1 << page_shift);
}
/* Map umem buf ptrs to the PBL */
umem_pgs = fill_umem_pbl_tbl(umem, pbl_tbl, page_shift);
rc = bnxt_qplib_reg_mr(&rdev->qplib_res, &mr->qplib_mr, pbl_tbl,
umem_pgs, false, 1 << page_shift);
if (rc) {
dev_err(rdev_to_dev(rdev), "Failed to register user MR");
goto fail;
}
kfree(pbl_tbl);
mr->ib_mr.lkey = mr->qplib_mr.lkey;
mr->ib_mr.rkey = mr->qplib_mr.lkey;
atomic_inc(&rdev->mr_count);
return &mr->ib_mr;
fail:
kfree(pbl_tbl);
free_umem:
ib_umem_release(umem);
free_mrw:
bnxt_qplib_free_mrw(&rdev->qplib_res, &mr->qplib_mr);
free_mr:
kfree(mr);
return ERR_PTR(rc);
}
struct ib_ucontext *bnxt_re_alloc_ucontext(struct ib_device *ibdev,
struct ib_udata *udata)
{
struct bnxt_re_dev *rdev = to_bnxt_re_dev(ibdev, ibdev);
struct bnxt_re_uctx_resp resp;
struct bnxt_re_ucontext *uctx;
struct bnxt_qplib_dev_attr *dev_attr = &rdev->dev_attr;
int rc;
dev_dbg(rdev_to_dev(rdev), "ABI version requested %d",
ibdev->uverbs_abi_ver);
if (ibdev->uverbs_abi_ver != BNXT_RE_ABI_VERSION) {
dev_dbg(rdev_to_dev(rdev), " is different from the device %d ",
BNXT_RE_ABI_VERSION);
return ERR_PTR(-EPERM);
}
uctx = kzalloc(sizeof(*uctx), GFP_KERNEL);
if (!uctx)
return ERR_PTR(-ENOMEM);
uctx->rdev = rdev;
uctx->shpg = (void *)__get_free_page(GFP_KERNEL);
if (!uctx->shpg) {
rc = -ENOMEM;
goto fail;
}
spin_lock_init(&uctx->sh_lock);
resp.dev_id = rdev->en_dev->pdev->devfn; /*Temp, Use idr_alloc instead*/
resp.max_qp = rdev->qplib_ctx.qpc_count;
resp.pg_size = PAGE_SIZE;
resp.cqe_sz = sizeof(struct cq_base);
resp.max_cqd = dev_attr->max_cq_wqes;
resp.rsvd = 0;
rc = ib_copy_to_udata(udata, &resp, sizeof(resp));
if (rc) {
dev_err(rdev_to_dev(rdev), "Failed to copy user context");
rc = -EFAULT;
goto cfail;
}
return &uctx->ib_uctx;
cfail:
free_page((unsigned long)uctx->shpg);
uctx->shpg = NULL;
fail:
kfree(uctx);
return ERR_PTR(rc);
}
int bnxt_re_dealloc_ucontext(struct ib_ucontext *ib_uctx)
{
struct bnxt_re_ucontext *uctx = container_of(ib_uctx,
struct bnxt_re_ucontext,
ib_uctx);
struct bnxt_re_dev *rdev = uctx->rdev;
int rc = 0;
if (uctx->shpg)
free_page((unsigned long)uctx->shpg);
if (uctx->dpi.dbr) {
/* Free DPI only if this is the first PD allocated by the
* application and mark the context dpi as NULL
*/
rc = bnxt_qplib_dealloc_dpi(&rdev->qplib_res,
&rdev->qplib_res.dpi_tbl,
&uctx->dpi);
if (rc)
dev_err(rdev_to_dev(rdev), "Deallocate HW DPI failed!");
/* Don't fail, continue*/
uctx->dpi.dbr = NULL;
}
kfree(uctx);
return 0;
}
/* Helper function to mmap the virtual memory from user app */
int bnxt_re_mmap(struct ib_ucontext *ib_uctx, struct vm_area_struct *vma)
{
struct bnxt_re_ucontext *uctx = container_of(ib_uctx,
struct bnxt_re_ucontext,
ib_uctx);
struct bnxt_re_dev *rdev = uctx->rdev;
u64 pfn;
if (vma->vm_end - vma->vm_start != PAGE_SIZE)
return -EINVAL;
if (vma->vm_pgoff) {
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
if (io_remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
PAGE_SIZE, vma->vm_page_prot)) {
dev_err(rdev_to_dev(rdev), "Failed to map DPI");
return -EAGAIN;
}
} else {
pfn = virt_to_phys(uctx->shpg) >> PAGE_SHIFT;
if (remap_pfn_range(vma, vma->vm_start,
pfn, PAGE_SIZE, vma->vm_page_prot)) {
dev_err(rdev_to_dev(rdev),
"Failed to map shared page");
return -EAGAIN;
}
}
return 0;
}
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