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verbs.c
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verbs.c
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/*
* Broadcom NetXtreme-E User Space RoCE driver
*
* Copyright (c) 2015-2017, 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: User IB-Verbs implementation
*/
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <signal.h>
#include <errno.h>
#include <pthread.h>
#include <sys/mman.h>
#include <netinet/in.h>
#include <unistd.h>
#include <ccan/ilog.h>
#include <util/compiler.h>
#include <util/util.h>
#include "main.h"
#include "verbs.h"
static int bnxt_re_poll_one(struct bnxt_re_cq *cq, int nwc, struct ibv_wc *wc,
uint32_t *resize);
int bnxt_re_query_device(struct ibv_context *context,
const struct ibv_query_device_ex_input *input,
struct ibv_device_attr_ex *attr, size_t attr_size)
{
struct ib_uverbs_ex_query_device_resp resp;
size_t resp_size = sizeof(resp);
uint8_t fw_ver[8];
int err;
err = ibv_cmd_query_device_any(context, input, attr, attr_size, &resp,
&resp_size);
if (err)
return err;
memcpy(fw_ver, &resp.base.fw_ver, sizeof(resp.base.fw_ver));
snprintf(attr->orig_attr.fw_ver, 64, "%d.%d.%d.%d", fw_ver[0],
fw_ver[1], fw_ver[2], fw_ver[3]);
return 0;
}
int bnxt_re_query_port(struct ibv_context *ibvctx, uint8_t port,
struct ibv_port_attr *port_attr)
{
struct ibv_query_port cmd;
return ibv_cmd_query_port(ibvctx, port, port_attr, &cmd, sizeof(cmd));
}
static inline bool bnxt_re_is_wcdpi_enabled(struct bnxt_re_context *cntx)
{
return cntx->comp_mask & BNXT_RE_COMP_MASK_UCNTX_WC_DPI_ENABLED;
}
static int bnxt_re_map_db_page(struct ibv_context *ibvctx,
uint64_t dbr, uint32_t dpi)
{
struct bnxt_re_context *cntx = to_bnxt_re_context(ibvctx);
struct bnxt_re_dev *dev = to_bnxt_re_dev(ibvctx->device);
cntx->udpi.dpindx = dpi;
cntx->udpi.dbpage = mmap(NULL, dev->pg_size, PROT_WRITE,
MAP_SHARED, ibvctx->cmd_fd, dbr);
if (cntx->udpi.dbpage == MAP_FAILED)
return -ENOMEM;
return 0;
}
int bnxt_re_get_toggle_mem(struct ibv_context *ibvctx,
struct bnxt_re_mmap_info *minfo,
uint32_t *page_handle)
{
DECLARE_COMMAND_BUFFER(cmd,
BNXT_RE_OBJECT_GET_TOGGLE_MEM,
BNXT_RE_METHOD_GET_TOGGLE_MEM,
4);
struct ib_uverbs_attr *handle;
int ret;
handle = fill_attr_out_obj(cmd, BNXT_RE_TOGGLE_MEM_HANDLE);
fill_attr_const_in(cmd, BNXT_RE_TOGGLE_MEM_TYPE, minfo->type);
fill_attr_in(cmd, BNXT_RE_TOGGLE_MEM_RES_ID, &minfo->res_id, sizeof(minfo->res_id));
fill_attr_out_ptr(cmd, BNXT_RE_TOGGLE_MEM_MMAP_PAGE, &minfo->alloc_offset);
fill_attr_out_ptr(cmd, BNXT_RE_TOGGLE_MEM_MMAP_LENGTH, &minfo->alloc_size);
fill_attr_out_ptr(cmd, BNXT_RE_TOGGLE_MEM_MMAP_OFFSET, &minfo->pg_offset);
ret = execute_ioctl(ibvctx, cmd);
if (ret)
return ret;
if (page_handle)
*page_handle = read_attr_obj(BNXT_RE_TOGGLE_MEM_HANDLE, handle);
return 0;
}
int bnxt_re_notify_drv(struct ibv_context *ibvctx)
{
DECLARE_COMMAND_BUFFER(cmd,
BNXT_RE_OBJECT_NOTIFY_DRV,
BNXT_RE_METHOD_NOTIFY_DRV,
0);
return execute_ioctl(ibvctx, cmd);
}
int bnxt_re_alloc_page(struct ibv_context *ibvctx,
struct bnxt_re_mmap_info *minfo,
uint32_t *page_handle)
{
DECLARE_COMMAND_BUFFER(cmd,
BNXT_RE_OBJECT_ALLOC_PAGE,
BNXT_RE_METHOD_ALLOC_PAGE,
4);
struct ib_uverbs_attr *handle;
int ret;
handle = fill_attr_out_obj(cmd, BNXT_RE_ALLOC_PAGE_HANDLE);
fill_attr_const_in(cmd, BNXT_RE_ALLOC_PAGE_TYPE, minfo->type);
fill_attr_out_ptr(cmd, BNXT_RE_ALLOC_PAGE_MMAP_OFFSET,
&minfo->alloc_offset);
fill_attr_out_ptr(cmd, BNXT_RE_ALLOC_PAGE_MMAP_LENGTH, &minfo->alloc_size);
fill_attr_out_ptr(cmd, BNXT_RE_ALLOC_PAGE_DPI, &minfo->dpi);
ret = execute_ioctl(ibvctx, cmd);
if (ret)
return ret;
if (page_handle)
*page_handle = read_attr_obj(BNXT_RE_ALLOC_PAGE_HANDLE, handle);
return 0;
}
static int bnxt_re_alloc_map_push_page(struct ibv_context *ibvctx)
{
struct bnxt_re_context *cntx = to_bnxt_re_context(ibvctx);
struct bnxt_re_mmap_info minfo = {};
int ret;
minfo.type = BNXT_RE_ALLOC_WC_PAGE;
ret = bnxt_re_alloc_page(ibvctx, &minfo, &cntx->wc_handle);
if (ret)
return ret;
cntx->udpi.wcdbpg = mmap(NULL, minfo.alloc_size, PROT_WRITE,
MAP_SHARED, ibvctx->cmd_fd, minfo.alloc_offset);
if (cntx->udpi.wcdbpg == MAP_FAILED)
return -ENOMEM;
cntx->udpi.wcdpi = minfo.dpi;
return 0;
}
struct ibv_pd *bnxt_re_alloc_pd(struct ibv_context *ibvctx)
{
struct ibv_alloc_pd cmd;
struct ubnxt_re_pd_resp resp;
struct bnxt_re_context *cntx = to_bnxt_re_context(ibvctx);
struct bnxt_re_pd *pd;
uint64_t dbr = 0;
pd = calloc(1, sizeof(*pd));
if (!pd)
return NULL;
memset(&resp, 0, sizeof(resp));
if (ibv_cmd_alloc_pd(ibvctx, &pd->ibvpd, &cmd, sizeof(cmd),
&resp.ibv_resp, sizeof(resp)))
goto out;
pd->pdid = resp.pdid;
dbr = resp.dbr;
static_assert(offsetof(struct ubnxt_re_pd_resp, dbr) == 4 * 3,
"Bad dbr placement");
/* Map DB page now. */
if (!cntx->udpi.dbpage) {
if (bnxt_re_map_db_page(ibvctx, dbr, resp.dpi))
goto fail;
if (bnxt_re_is_wcdpi_enabled(cntx)) {
bnxt_re_alloc_map_push_page(ibvctx);
if (cntx->cctx.gen_p5_p7 && cntx->udpi.wcdpi)
bnxt_re_init_pbuf_list(cntx);
}
}
return &pd->ibvpd;
fail:
(void)ibv_cmd_dealloc_pd(&pd->ibvpd);
out:
free(pd);
return NULL;
}
int bnxt_re_free_pd(struct ibv_pd *ibvpd)
{
struct bnxt_re_pd *pd = to_bnxt_re_pd(ibvpd);
int status;
status = ibv_cmd_dealloc_pd(ibvpd);
if (status)
return status;
/* DPI un-mapping will be during uninit_ucontext */
free(pd);
return 0;
}
struct ibv_mr *bnxt_re_reg_mr(struct ibv_pd *ibvpd, void *sva, size_t len,
uint64_t hca_va, int access)
{
struct bnxt_re_mr *mr;
struct ibv_reg_mr cmd;
struct ubnxt_re_mr_resp resp;
mr = calloc(1, sizeof(*mr));
if (!mr)
return NULL;
if (ibv_cmd_reg_mr(ibvpd, sva, len, hca_va, access, &mr->vmr, &cmd,
sizeof(cmd), &resp.ibv_resp, sizeof(resp))) {
free(mr);
return NULL;
}
return &mr->vmr.ibv_mr;
}
struct ibv_mr *bnxt_re_reg_dmabuf_mr(struct ibv_pd *ibvpd, uint64_t start, size_t len,
uint64_t iova, int fd, int access)
{
struct bnxt_re_mr *mr;
mr = calloc(1, sizeof(*mr));
if (!mr)
return NULL;
if (ibv_cmd_reg_dmabuf_mr(ibvpd, start, len, iova, fd,
access, &mr->vmr)) {
free(mr);
return NULL;
}
return &mr->vmr.ibv_mr;
}
int bnxt_re_dereg_mr(struct verbs_mr *vmr)
{
struct bnxt_re_mr *mr = (struct bnxt_re_mr *)vmr;
int status;
status = ibv_cmd_dereg_mr(vmr);
if (status)
return status;
free(mr);
return 0;
}
struct ibv_cq *bnxt_re_create_cq(struct ibv_context *ibvctx, int ncqe,
struct ibv_comp_channel *channel, int vec)
{
struct bnxt_re_cq *cq;
struct ubnxt_re_cq cmd;
struct ubnxt_re_cq_resp resp;
struct bnxt_re_mmap_info minfo = {};
int ret;
struct bnxt_re_context *cntx = to_bnxt_re_context(ibvctx);
struct bnxt_re_dev *dev = to_bnxt_re_dev(ibvctx->device);
if (!ncqe || ncqe > dev->max_cq_depth) {
errno = EINVAL;
return NULL;
}
cq = calloc(1, sizeof(*cq));
if (!cq)
return NULL;
/* Enable deferred DB mode for CQ if the CQ is small */
if (ncqe * 2 < dev->max_cq_depth) {
cq->deffered_db_sup = true;
ncqe = 2 * ncqe;
}
cq->cqq.depth = bnxt_re_init_depth(ncqe + 1, cntx->comp_mask);
if (cq->cqq.depth > dev->max_cq_depth + 1)
cq->cqq.depth = dev->max_cq_depth + 1;
cq->cqq.stride = dev->cqe_size;
if (bnxt_re_alloc_aligned(&cq->cqq, dev->pg_size))
goto fail;
pthread_spin_init(&cq->cqq.qlock, PTHREAD_PROCESS_PRIVATE);
cmd.cq_va = (uintptr_t)cq->cqq.va;
cmd.cq_handle = (uintptr_t)cq;
memset(&resp, 0, sizeof(resp));
if (ibv_cmd_create_cq(ibvctx, ncqe, channel, vec,
&cq->ibvcq, &cmd.ibv_cmd, sizeof(cmd),
&resp.ibv_resp, sizeof(resp)))
goto cmdfail;
cq->cqid = resp.cqid;
cq->phase = resp.phase;
cq->cqq.tail = resp.tail;
cq->udpi = &cntx->udpi;
cq->cntx = cntx;
cq->rand.seed = cq->cqid;
if (resp.comp_mask & BNXT_RE_CQ_TOGGLE_PAGE_SUPPORT) {
minfo.type = BNXT_RE_CQ_TOGGLE_MEM;
minfo.res_id = resp.cqid;
ret = bnxt_re_get_toggle_mem(ibvctx, &minfo, &cq->mem_handle);
if (ret)
goto cmdfail;
cq->toggle_map = mmap(NULL, minfo.alloc_size, PROT_READ,
MAP_SHARED, ibvctx->cmd_fd, minfo.alloc_offset);
if (cq->toggle_map == MAP_FAILED)
goto cmdfail;
cq->toggle_size = minfo.alloc_size;
}
list_head_init(&cq->sfhead);
list_head_init(&cq->rfhead);
list_head_init(&cq->prev_cq_head);
return &cq->ibvcq;
cmdfail:
bnxt_re_free_aligned(&cq->cqq);
fail:
free(cq);
return NULL;
}
/*
* Function to complete the last steps in CQ resize. Invoke poll function
* in the kernel driver; this serves as a signal to the driver to complete CQ
* resize steps required. Free memory mapped for the original CQ and switch
* over to the memory mapped for CQ with the new size. Finally Ack the Cutoff
* CQE. This function must be called under cq->cqq.lock.
*/
static void bnxt_re_resize_cq_complete(struct bnxt_re_cq *cq)
{
struct ibv_wc tmp_wc;
ibv_cmd_poll_cq(&cq->ibvcq, 1, &tmp_wc);
bnxt_re_free_aligned(&cq->cqq);
memcpy(&cq->cqq, &cq->resize_cqq, sizeof(cq->cqq));
bnxt_re_ring_cq_arm_db(cq, BNXT_RE_QUE_TYPE_CQ_CUT_ACK);
}
int bnxt_re_resize_cq(struct ibv_cq *ibvcq, int ncqe)
{
struct bnxt_re_context *cntx = to_bnxt_re_context(ibvcq->context);
struct bnxt_re_dev *dev = to_bnxt_re_dev(ibvcq->context->device);
struct bnxt_re_cq *cq = to_bnxt_re_cq(ibvcq);
struct ib_uverbs_resize_cq_resp resp = {};
struct ubnxt_re_resize_cq cmd = {};
int rc = 0;
if (ncqe > dev->max_cq_depth)
return -EINVAL;
/* Check if we can be in defered DB mode with the
* newer size of CQE.
*/
if (2 * ncqe > dev->max_cq_depth) {
cq->deffered_db_sup = false;
} else {
ncqe = 2 * ncqe;
cq->deffered_db_sup = true;
}
pthread_spin_lock(&cq->cqq.qlock);
cq->resize_cqq.depth = bnxt_re_init_depth(ncqe + 1, cntx->comp_mask);
if (cq->resize_cqq.depth > dev->max_cq_depth + 1)
cq->resize_cqq.depth = dev->max_cq_depth + 1;
cq->resize_cqq.stride = dev->cqe_size;
if (bnxt_re_alloc_aligned(&cq->resize_cqq, dev->pg_size))
goto done;
/* As an exception no need to call get_ring api we know
* this is the only consumer
*/
cmd.cq_va = (uintptr_t)cq->resize_cqq.va;
rc = ibv_cmd_resize_cq(ibvcq, ncqe, &cmd.ibv_cmd,
sizeof(cmd), &resp, sizeof(resp));
if (rc) {
bnxt_re_free_aligned(&cq->resize_cqq);
goto done;
}
while (true) {
struct bnxt_re_work_compl *compl = NULL;
struct ibv_wc tmp_wc = {};
uint32_t resize = 0;
int dqed = 0;
dqed = bnxt_re_poll_one(cq, 1, &tmp_wc, &resize);
if (resize)
break;
if (dqed) {
compl = calloc(1, sizeof(*compl));
if (!compl)
break;
memcpy(&compl->wc, &tmp_wc, sizeof(tmp_wc));
list_add_tail(&cq->prev_cq_head, &compl->list);
compl = NULL;
memset(&tmp_wc, 0, sizeof(tmp_wc));
}
}
done:
pthread_spin_unlock(&cq->cqq.qlock);
return rc;
}
static void bnxt_re_destroy_resize_cq_list(struct bnxt_re_cq *cq)
{
struct bnxt_re_work_compl *compl, *tmp;
if (list_empty(&cq->prev_cq_head))
return;
list_for_each_safe(&cq->prev_cq_head, compl, tmp, list) {
list_del(&compl->list);
free(compl);
}
}
int bnxt_re_destroy_cq(struct ibv_cq *ibvcq)
{
int status;
struct bnxt_re_cq *cq = to_bnxt_re_cq(ibvcq);
if (cq->toggle_map)
munmap(cq->toggle_map, cq->toggle_size);
status = ibv_cmd_destroy_cq(ibvcq);
if (status)
return status;
bnxt_re_destroy_resize_cq_list(cq);
bnxt_re_free_aligned(&cq->cqq);
free(cq);
return 0;
}
static uint8_t bnxt_re_poll_err_scqe(struct bnxt_re_qp *qp,
struct ibv_wc *ibvwc,
struct bnxt_re_bcqe *hdr,
struct bnxt_re_req_cqe *scqe, int *cnt)
{
struct bnxt_re_queue *sq = qp->jsqq->hwque;
struct bnxt_re_wrid *swrid;
struct bnxt_re_cq *scq;
uint8_t status;
uint32_t head;
scq = to_bnxt_re_cq(qp->ibvqp.send_cq);
head = qp->jsqq->last_idx;
swrid = &qp->jsqq->swque[head];
*cnt = 1;
status = (le32toh(hdr->flg_st_typ_ph) >> BNXT_RE_BCQE_STATUS_SHIFT) &
BNXT_RE_BCQE_STATUS_MASK;
ibvwc->status = bnxt_re_to_ibv_wc_status(status, true);
ibvwc->wc_flags = 0;
ibvwc->wr_id = swrid->wrid;
ibvwc->qp_num = qp->qpid;
ibvwc->opcode = swrid->wc_opcd;
ibvwc->byte_len = 0;
bnxt_re_incr_head(sq, swrid->slots);
bnxt_re_jqq_mod_last(qp->jsqq, head);
if (qp->qpst != IBV_QPS_ERR)
qp->qpst = IBV_QPS_ERR;
bnxt_re_fque_add_node(&scq->sfhead, &qp->snode);
return false;
}
static uint8_t bnxt_re_poll_success_scqe(struct bnxt_re_qp *qp,
struct ibv_wc *ibvwc,
struct bnxt_re_bcqe *hdr,
struct bnxt_re_req_cqe *scqe,
int *cnt)
{
struct bnxt_re_queue *sq = qp->jsqq->hwque;
struct bnxt_re_wrid *swrid;
uint32_t cindx;
uint32_t head;
head = qp->jsqq->last_idx;
swrid = &qp->jsqq->swque[head];
cindx = le32toh(scqe->con_indx) % qp->cap.max_swr;
if (!(swrid->sig & IBV_SEND_SIGNALED)) {
*cnt = 0;
} else {
ibvwc->status = IBV_WC_SUCCESS;
ibvwc->wc_flags = 0;
ibvwc->qp_num = qp->qpid;
ibvwc->wr_id = swrid->wrid;
ibvwc->opcode = swrid->wc_opcd;
if (ibvwc->opcode == IBV_WC_RDMA_READ ||
ibvwc->opcode == IBV_WC_COMP_SWAP ||
ibvwc->opcode == IBV_WC_FETCH_ADD)
ibvwc->byte_len = swrid->bytes;
*cnt = 1;
}
bnxt_re_incr_head(sq, swrid->slots);
bnxt_re_jqq_mod_last(qp->jsqq, head);
if (qp->jsqq->last_idx != cindx)
return true;
return false;
}
static uint8_t bnxt_re_poll_scqe(struct bnxt_re_qp *qp, struct ibv_wc *ibvwc,
void *cqe, int *cnt)
{
struct bnxt_re_req_cqe *scqe;
struct bnxt_re_bcqe *hdr;
uint8_t status;
scqe = cqe;
hdr = cqe + sizeof(struct bnxt_re_req_cqe);
status = (le32toh(hdr->flg_st_typ_ph) >> BNXT_RE_BCQE_STATUS_SHIFT) &
BNXT_RE_BCQE_STATUS_MASK;
if (likely(status == BNXT_RE_REQ_ST_OK))
return bnxt_re_poll_success_scqe(qp, ibvwc, hdr, scqe, cnt);
else
return bnxt_re_poll_err_scqe(qp, ibvwc, hdr, scqe, cnt);
}
static void bnxt_re_release_srqe(struct bnxt_re_srq *srq, int tag)
{
pthread_spin_lock(&srq->srqq->qlock);
srq->srwrid[srq->last_idx].next_idx = tag;
srq->last_idx = tag;
srq->srwrid[srq->last_idx].next_idx = -1;
pthread_spin_unlock(&srq->srqq->qlock);
}
static int bnxt_re_poll_err_rcqe(struct bnxt_re_qp *qp, struct ibv_wc *ibvwc,
struct bnxt_re_bcqe *hdr, void *cqe)
{
struct bnxt_re_wrid *swque;
struct bnxt_re_queue *rq;
uint8_t status, cnt = 0;
struct bnxt_re_cq *rcq;
uint32_t head = 0;
rcq = to_bnxt_re_cq(qp->ibvqp.recv_cq);
if (!qp->srq) {
rq = qp->jrqq->hwque;
head = qp->jrqq->last_idx;
swque = &qp->jrqq->swque[head];
ibvwc->wr_id = swque->wrid;
cnt = swque->slots;
} else {
struct bnxt_re_srq *srq;
int tag;
srq = qp->srq;
rq = srq->srqq;
cnt = 1;
tag = le32toh(hdr->qphi_rwrid) & BNXT_RE_BCQE_RWRID_MASK;
ibvwc->wr_id = srq->srwrid[tag].wrid;
bnxt_re_release_srqe(srq, tag);
}
status = (le32toh(hdr->flg_st_typ_ph) >> BNXT_RE_BCQE_STATUS_SHIFT) &
BNXT_RE_BCQE_STATUS_MASK;
/* skip h/w flush errors */
if (status == BNXT_RE_RSP_ST_HW_FLUSH)
return 0;
ibvwc->status = bnxt_re_to_ibv_wc_status(status, false);
ibvwc->qp_num = qp->qpid;
ibvwc->opcode = IBV_WC_RECV;
ibvwc->byte_len = 0;
ibvwc->wc_flags = 0;
if (qp->qptyp == IBV_QPT_UD)
ibvwc->src_qp = 0;
if (!qp->srq)
bnxt_re_jqq_mod_last(qp->jrqq, head);
bnxt_re_incr_head(rq, cnt);
if (!qp->srq)
bnxt_re_fque_add_node(&rcq->rfhead, &qp->rnode);
return 1;
}
static void bnxt_re_fill_ud_cqe(struct ibv_wc *ibvwc,
struct bnxt_re_bcqe *hdr, void *cqe, uint8_t flags)
{
struct bnxt_re_ud_cqe *ucqe = cqe;
uint32_t qpid;
qpid = ((le32toh(hdr->qphi_rwrid) >> BNXT_RE_BCQE_SRCQP_SHIFT) &
BNXT_RE_BCQE_SRCQP_SHIFT) << 0x10; /* higher 8 bits of 24 */
qpid |= (le64toh(ucqe->qplo_mac) >> BNXT_RE_UD_CQE_SRCQPLO_SHIFT) &
BNXT_RE_UD_CQE_SRCQPLO_MASK; /*lower 16 of 24 */
ibvwc->src_qp = qpid;
ibvwc->wc_flags |= IBV_WC_GRH;
ibvwc->sl = (flags & BNXT_RE_UD_FLAGS_IP_VER_MASK) >>
BNXT_RE_UD_FLAGS_IP_VER_SFT;
/*IB-stack ABI in user do not ask for MAC to be reported. */
}
static void bnxt_re_poll_success_rcqe(struct bnxt_re_qp *qp,
struct ibv_wc *ibvwc,
struct bnxt_re_bcqe *hdr, void *cqe)
{
uint8_t flags, is_imm, is_rdma;
struct bnxt_re_rc_cqe *rcqe;
struct bnxt_re_wrid *swque;
struct bnxt_re_queue *rq;
uint32_t rcqe_len;
uint32_t head = 0;
uint8_t cnt = 0;
rcqe = cqe;
if (!qp->srq) {
rq = qp->jrqq->hwque;
head = qp->jrqq->last_idx;
swque = &qp->jrqq->swque[head];
ibvwc->wr_id = swque->wrid;
cnt = swque->slots;
} else {
struct bnxt_re_srq *srq;
int tag;
srq = qp->srq;
rq = srq->srqq;
tag = le32toh(hdr->qphi_rwrid) & BNXT_RE_BCQE_RWRID_MASK;
ibvwc->wr_id = srq->srwrid[tag].wrid;
cnt = 1;
bnxt_re_release_srqe(srq, tag);
}
ibvwc->status = IBV_WC_SUCCESS;
ibvwc->qp_num = qp->qpid;
rcqe_len = le32toh(rcqe->length);
ibvwc->byte_len = (qp->qptyp == IBV_QPT_UD) ?
rcqe_len & BNXT_RE_UD_CQE_LEN_MASK: rcqe_len ;
ibvwc->opcode = IBV_WC_RECV;
flags = (le32toh(hdr->flg_st_typ_ph) >> BNXT_RE_BCQE_FLAGS_SHIFT) &
BNXT_RE_BCQE_FLAGS_MASK;
is_imm = (flags & BNXT_RE_RC_FLAGS_IMM_MASK) >>
BNXT_RE_RC_FLAGS_IMM_SHIFT;
is_rdma = (flags & BNXT_RE_RC_FLAGS_RDMA_MASK) >>
BNXT_RE_RC_FLAGS_RDMA_SHIFT;
ibvwc->wc_flags = 0;
if (is_imm) {
ibvwc->wc_flags |= IBV_WC_WITH_IMM;
/* Completion reports the raw-data in LE format, While
* user expects it in BE format. Thus, swapping on outgoing
* data is needed. On a BE platform le32toh will do the swap
* while on LE platform htobe32 will do the job.
*/
ibvwc->imm_data = htobe32(le32toh(rcqe->imm_key));
if (is_rdma)
ibvwc->opcode = IBV_WC_RECV_RDMA_WITH_IMM;
}
if (qp->qptyp == IBV_QPT_UD)
bnxt_re_fill_ud_cqe(ibvwc, hdr, cqe, flags);
if (!qp->srq)
bnxt_re_jqq_mod_last(qp->jrqq, head);
bnxt_re_incr_head(rq, cnt);
}
static uint8_t bnxt_re_poll_rcqe(struct bnxt_re_qp *qp, struct ibv_wc *ibvwc,
void *cqe, int *cnt)
{
struct bnxt_re_bcqe *hdr;
uint8_t status, pcqe = false;
hdr = cqe + sizeof(struct bnxt_re_rc_cqe);
status = (le32toh(hdr->flg_st_typ_ph) >> BNXT_RE_BCQE_STATUS_SHIFT) &
BNXT_RE_BCQE_STATUS_MASK;
*cnt = 1;
if (likely(status == BNXT_RE_RSP_ST_OK))
bnxt_re_poll_success_rcqe(qp, ibvwc, hdr, cqe);
else
*cnt = bnxt_re_poll_err_rcqe(qp, ibvwc, hdr, cqe);
return pcqe;
}
static void bnxt_re_qp_move_flush_err(struct bnxt_re_qp *qp)
{
struct bnxt_re_cq *scq, *rcq;
scq = to_bnxt_re_cq(qp->ibvqp.send_cq);
rcq = to_bnxt_re_cq(qp->ibvqp.recv_cq);
if (qp->qpst != IBV_QPS_ERR)
qp->qpst = IBV_QPS_ERR;
bnxt_re_fque_add_node(&rcq->rfhead, &qp->rnode);
bnxt_re_fque_add_node(&scq->sfhead, &qp->snode);
}
static uint8_t bnxt_re_poll_term_cqe(struct bnxt_re_qp *qp, int *cnt)
{
/* For now just add the QP to flush list without
* considering the index reported in the CQE.
* Continue reporting flush completions until the
* SQ and RQ are empty.
*/
*cnt = 0;
if (qp->qpst != IBV_QPS_RESET)
bnxt_re_qp_move_flush_err(qp);
return 0;
}
static inline void bnxt_re_check_and_ring_cq_db(struct bnxt_re_cq *cq,
int *hw_polled)
{
/* Ring doorbell only if the CQ is at
* least half when deferred db mode is active
*/
if (cq->deffered_db_sup) {
if (cq->hw_cqes < cq->cqq.depth / 2)
return;
*hw_polled = 0;
cq->hw_cqes = 0;
}
bnxt_re_ring_cq_db(cq);
}
static int bnxt_re_poll_one(struct bnxt_re_cq *cq, int nwc, struct ibv_wc *wc,
uint32_t *resize)
{
int type, cnt = 0, dqed = 0, hw_polled = 0;
struct bnxt_re_queue *cqq = &cq->cqq;
struct bnxt_re_req_cqe *scqe;
struct bnxt_re_ud_cqe *rcqe;
uint64_t *qp_handle = NULL;
struct bnxt_re_bcqe *hdr;
struct bnxt_re_qp *qp;
uint8_t pcqe = false;
uint32_t flg_val;
void *cqe;
while (nwc) {
cqe = cqq->va + cqq->head * bnxt_re_get_cqe_sz();
hdr = cqe + sizeof(struct bnxt_re_req_cqe);
if (!bnxt_re_is_cqe_valid(cq, hdr))
break;
flg_val = le32toh(hdr->flg_st_typ_ph);
type = (flg_val >> BNXT_RE_BCQE_TYPE_SHIFT) & BNXT_RE_BCQE_TYPE_MASK;
switch (type) {
case BNXT_RE_WC_TYPE_SEND:
scqe = cqe;
qp_handle = (uint64_t *)&scqe->qp_handle;
qp = (struct bnxt_re_qp *)
(uintptr_t)le64toh(scqe->qp_handle);
if (!qp)
break; /*stale cqe. should be rung.*/
pcqe = bnxt_re_poll_scqe(qp, wc, cqe, &cnt);
break;
case BNXT_RE_WC_TYPE_RECV_RC:
case BNXT_RE_WC_TYPE_RECV_UD:
rcqe = cqe;
qp_handle = (uint64_t *)&rcqe->qp_handle;
qp = (struct bnxt_re_qp *)
(uintptr_t)le64toh(rcqe->qp_handle);
if (!qp)
break; /*stale cqe. should be rung.*/
pcqe = bnxt_re_poll_rcqe(qp, wc, cqe, &cnt);
break;
case BNXT_RE_WC_TYPE_RECV_RAW:
break;
case BNXT_RE_WC_TYPE_TERM:
scqe = cqe;
qp_handle = (uint64_t *)&scqe->qp_handle;
qp = (struct bnxt_re_qp *)
(uintptr_t)le64toh(scqe->qp_handle);
if (!qp)
break;
pcqe = bnxt_re_poll_term_cqe(qp, &cnt);
break;
case BNXT_RE_WC_TYPE_COFF:
/* Stop further processing and return */
cq->resize_tog = (flg_val >> BNXT_RE_BCQE_RESIZE_TOG_SHIFT)
& BNXT_RE_BCQE_RESIZE_TOG_MASK;
bnxt_re_resize_cq_complete(cq);
if (resize)
*resize = 1;
return dqed;
default:
break;
};
if (pcqe)
goto skipp_real;
hw_polled++;
cq->hw_cqes++;
if (qp_handle) {
*qp_handle = 0x0ULL; /* mark cqe as read */
qp_handle = NULL;
}
bnxt_re_incr_head(&cq->cqq, 1);
bnxt_re_change_cq_phase(cq);
skipp_real:
if (cnt) {
cnt = 0;
dqed++;
nwc--;
wc++;
}
/* Extra check required to avoid CQ full */
if (cq->deffered_db_sup)
bnxt_re_check_and_ring_cq_db(cq, &hw_polled);
}
if (likely(hw_polled))
bnxt_re_check_and_ring_cq_db(cq, &hw_polled);
return dqed;
}
static int bnxt_re_poll_flush_wcs(struct bnxt_re_joint_queue *jqq,
struct ibv_wc *ibvwc, uint32_t qpid,
int nwc)
{
uint8_t opcode = IBV_WC_RECV;
struct bnxt_re_queue *que;
struct bnxt_re_wrid *wrid;
struct bnxt_re_psns *psns;
uint32_t cnt = 0;
que = jqq->hwque;
while (nwc) {
if (bnxt_re_is_que_empty(que))
break;
wrid = &jqq->swque[jqq->last_idx];
if (wrid->psns) {
psns = wrid->psns;
opcode = (le32toh(psns->opc_spsn) >>
BNXT_RE_PSNS_OPCD_SHIFT) &
BNXT_RE_PSNS_OPCD_MASK;
}
ibvwc->status = IBV_WC_WR_FLUSH_ERR;
ibvwc->opcode = opcode;
ibvwc->wr_id = wrid->wrid;
ibvwc->qp_num = qpid;
ibvwc->byte_len = 0;
ibvwc->wc_flags = 0;
bnxt_re_jqq_mod_last(jqq, jqq->last_idx);
bnxt_re_incr_head(que, wrid->slots);
nwc--;
cnt++;
ibvwc++;
}
return cnt;
}
static int bnxt_re_poll_flush_wqes(struct bnxt_re_cq *cq,
struct list_head *lhead,
struct ibv_wc *ibvwc,
int32_t nwc)
{
struct bnxt_re_fque_node *cur, *tmp;
struct bnxt_re_joint_queue *jqq;
struct bnxt_re_qp *qp;
bool sq_list = false;
uint32_t polled = 0;
sq_list = (lhead == &cq->sfhead) ? true : false;
if (!list_empty(lhead)) {
list_for_each_safe(lhead, cur, tmp, list) {
if (sq_list) {
qp = container_of(cur, struct bnxt_re_qp,
snode);
jqq = qp->jsqq;
} else {
qp = container_of(cur, struct bnxt_re_qp,
rnode);
jqq = qp->jrqq;
}
if (bnxt_re_is_que_empty(jqq->hwque))
continue;
polled += bnxt_re_poll_flush_wcs(jqq, ibvwc + polled,
qp->qpid,
nwc - polled);
if (!(nwc - polled))
break;
}
}
return polled;
}
static int bnxt_re_poll_flush_lists(struct bnxt_re_cq *cq, uint32_t nwc,
struct ibv_wc *ibvwc)
{
int left, polled = 0;
/* Check if flush Qs are empty */
if (list_empty(&cq->sfhead) && list_empty(&cq->rfhead))
return 0;
polled = bnxt_re_poll_flush_wqes(cq, &cq->sfhead, ibvwc, nwc);
left = nwc - polled;
if (!left)
return polled;
polled += bnxt_re_poll_flush_wqes(cq, &cq->rfhead,
ibvwc + polled, left);
return polled;
}
static int bnxt_re_poll_resize_cq_list(struct bnxt_re_cq *cq, uint32_t nwc,
struct ibv_wc *ibvwc)
{
struct bnxt_re_work_compl *compl, *tmp;
int left;
left = nwc;
list_for_each_safe(&cq->prev_cq_head, compl, tmp, list) {
if (!left)
break;
memcpy(ibvwc, &compl->wc, sizeof(*ibvwc));
ibvwc++;
left--;
list_del(&compl->list);
free(compl);
}
return nwc - left;
}
int bnxt_re_poll_cq(struct ibv_cq *ibvcq, int nwc, struct ibv_wc *wc)
{
struct bnxt_re_cq *cq = to_bnxt_re_cq(ibvcq);
int dqed = 0, left = 0;
uint32_t resize = 0;