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authorJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-11 10:41:07 +0300
committerJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-13 08:17:18 +0300
commite09b41010ba33a20a87472ee821fa407a5b8da36 (patch)
treed10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/drivers/infiniband/hw/ehca/ehca_reqs.c
parentf93b97fd65072de626c074dbe099a1fff05ce060 (diff)
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page. During the rebasing, the following patch collided: Force tick interrupt and get rid of softirq magic(I70131fb85). Collisions have been removed because its logic was found on the source already. Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769 Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/drivers/infiniband/hw/ehca/ehca_reqs.c')
-rw-r--r--kernel/drivers/infiniband/hw/ehca/ehca_reqs.c953
1 files changed, 0 insertions, 953 deletions
diff --git a/kernel/drivers/infiniband/hw/ehca/ehca_reqs.c b/kernel/drivers/infiniband/hw/ehca/ehca_reqs.c
deleted file mode 100644
index 47f949843..000000000
--- a/kernel/drivers/infiniband/hw/ehca/ehca_reqs.c
+++ /dev/null
@@ -1,953 +0,0 @@
-/*
- * IBM eServer eHCA Infiniband device driver for Linux on POWER
- *
- * post_send/recv, poll_cq, req_notify
- *
- * Authors: Hoang-Nam Nguyen <hnguyen@de.ibm.com>
- * Waleri Fomin <fomin@de.ibm.com>
- * Joachim Fenkes <fenkes@de.ibm.com>
- * Reinhard Ernst <rernst@de.ibm.com>
- *
- * Copyright (c) 2005 IBM Corporation
- *
- * All rights reserved.
- *
- * This source code is distributed under a dual license of GPL v2.0 and OpenIB
- * BSD.
- *
- * OpenIB BSD License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * Redistributions of source code must retain the above copyright notice, this
- * list of conditions and the following disclaimer.
- *
- * Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials
- * provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
- * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
- * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-
-#include "ehca_classes.h"
-#include "ehca_tools.h"
-#include "ehca_qes.h"
-#include "ehca_iverbs.h"
-#include "hcp_if.h"
-#include "hipz_fns.h"
-
-/* in RC traffic, insert an empty RDMA READ every this many packets */
-#define ACK_CIRC_THRESHOLD 2000000
-
-static u64 replace_wr_id(u64 wr_id, u16 idx)
-{
- u64 ret;
-
- ret = wr_id & ~QMAP_IDX_MASK;
- ret |= idx & QMAP_IDX_MASK;
-
- return ret;
-}
-
-static u16 get_app_wr_id(u64 wr_id)
-{
- return wr_id & QMAP_IDX_MASK;
-}
-
-static inline int ehca_write_rwqe(struct ipz_queue *ipz_rqueue,
- struct ehca_wqe *wqe_p,
- struct ib_recv_wr *recv_wr,
- u32 rq_map_idx)
-{
- u8 cnt_ds;
- if (unlikely((recv_wr->num_sge < 0) ||
- (recv_wr->num_sge > ipz_rqueue->act_nr_of_sg))) {
- ehca_gen_err("Invalid number of WQE SGE. "
- "num_sqe=%x max_nr_of_sg=%x",
- recv_wr->num_sge, ipz_rqueue->act_nr_of_sg);
- return -EINVAL; /* invalid SG list length */
- }
-
- /* clear wqe header until sglist */
- memset(wqe_p, 0, offsetof(struct ehca_wqe, u.ud_av.sg_list));
-
- wqe_p->work_request_id = replace_wr_id(recv_wr->wr_id, rq_map_idx);
- wqe_p->nr_of_data_seg = recv_wr->num_sge;
-
- for (cnt_ds = 0; cnt_ds < recv_wr->num_sge; cnt_ds++) {
- wqe_p->u.all_rcv.sg_list[cnt_ds].vaddr =
- recv_wr->sg_list[cnt_ds].addr;
- wqe_p->u.all_rcv.sg_list[cnt_ds].lkey =
- recv_wr->sg_list[cnt_ds].lkey;
- wqe_p->u.all_rcv.sg_list[cnt_ds].length =
- recv_wr->sg_list[cnt_ds].length;
- }
-
- if (ehca_debug_level >= 3) {
- ehca_gen_dbg("RECEIVE WQE written into ipz_rqueue=%p",
- ipz_rqueue);
- ehca_dmp(wqe_p, 16*(6 + wqe_p->nr_of_data_seg), "recv wqe");
- }
-
- return 0;
-}
-
-#if defined(DEBUG_GSI_SEND_WR)
-
-/* need ib_mad struct */
-#include <rdma/ib_mad.h>
-
-static void trace_send_wr_ud(const struct ib_send_wr *send_wr)
-{
- int idx;
- int j;
- while (send_wr) {
- struct ib_mad_hdr *mad_hdr = send_wr->wr.ud.mad_hdr;
- struct ib_sge *sge = send_wr->sg_list;
- ehca_gen_dbg("send_wr#%x wr_id=%lx num_sge=%x "
- "send_flags=%x opcode=%x", idx, send_wr->wr_id,
- send_wr->num_sge, send_wr->send_flags,
- send_wr->opcode);
- if (mad_hdr) {
- ehca_gen_dbg("send_wr#%x mad_hdr base_version=%x "
- "mgmt_class=%x class_version=%x method=%x "
- "status=%x class_specific=%x tid=%lx "
- "attr_id=%x resv=%x attr_mod=%x",
- idx, mad_hdr->base_version,
- mad_hdr->mgmt_class,
- mad_hdr->class_version, mad_hdr->method,
- mad_hdr->status, mad_hdr->class_specific,
- mad_hdr->tid, mad_hdr->attr_id,
- mad_hdr->resv,
- mad_hdr->attr_mod);
- }
- for (j = 0; j < send_wr->num_sge; j++) {
- u8 *data = __va(sge->addr);
- ehca_gen_dbg("send_wr#%x sge#%x addr=%p length=%x "
- "lkey=%x",
- idx, j, data, sge->length, sge->lkey);
- /* assume length is n*16 */
- ehca_dmp(data, sge->length, "send_wr#%x sge#%x",
- idx, j);
- sge++;
- } /* eof for j */
- idx++;
- send_wr = send_wr->next;
- } /* eof while send_wr */
-}
-
-#endif /* DEBUG_GSI_SEND_WR */
-
-static inline int ehca_write_swqe(struct ehca_qp *qp,
- struct ehca_wqe *wqe_p,
- const struct ib_send_wr *send_wr,
- u32 sq_map_idx,
- int hidden)
-{
- u32 idx;
- u64 dma_length;
- struct ehca_av *my_av;
- u32 remote_qkey = send_wr->wr.ud.remote_qkey;
- struct ehca_qmap_entry *qmap_entry = &qp->sq_map.map[sq_map_idx];
-
- if (unlikely((send_wr->num_sge < 0) ||
- (send_wr->num_sge > qp->ipz_squeue.act_nr_of_sg))) {
- ehca_gen_err("Invalid number of WQE SGE. "
- "num_sqe=%x max_nr_of_sg=%x",
- send_wr->num_sge, qp->ipz_squeue.act_nr_of_sg);
- return -EINVAL; /* invalid SG list length */
- }
-
- /* clear wqe header until sglist */
- memset(wqe_p, 0, offsetof(struct ehca_wqe, u.ud_av.sg_list));
-
- wqe_p->work_request_id = replace_wr_id(send_wr->wr_id, sq_map_idx);
-
- qmap_entry->app_wr_id = get_app_wr_id(send_wr->wr_id);
- qmap_entry->reported = 0;
- qmap_entry->cqe_req = 0;
-
- switch (send_wr->opcode) {
- case IB_WR_SEND:
- case IB_WR_SEND_WITH_IMM:
- wqe_p->optype = WQE_OPTYPE_SEND;
- break;
- case IB_WR_RDMA_WRITE:
- case IB_WR_RDMA_WRITE_WITH_IMM:
- wqe_p->optype = WQE_OPTYPE_RDMAWRITE;
- break;
- case IB_WR_RDMA_READ:
- wqe_p->optype = WQE_OPTYPE_RDMAREAD;
- break;
- default:
- ehca_gen_err("Invalid opcode=%x", send_wr->opcode);
- return -EINVAL; /* invalid opcode */
- }
-
- wqe_p->wqef = (send_wr->opcode) & WQEF_HIGH_NIBBLE;
-
- wqe_p->wr_flag = 0;
-
- if ((send_wr->send_flags & IB_SEND_SIGNALED ||
- qp->init_attr.sq_sig_type == IB_SIGNAL_ALL_WR)
- && !hidden) {
- wqe_p->wr_flag |= WQE_WRFLAG_REQ_SIGNAL_COM;
- qmap_entry->cqe_req = 1;
- }
-
- if (send_wr->opcode == IB_WR_SEND_WITH_IMM ||
- send_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) {
- /* this might not work as long as HW does not support it */
- wqe_p->immediate_data = be32_to_cpu(send_wr->ex.imm_data);
- wqe_p->wr_flag |= WQE_WRFLAG_IMM_DATA_PRESENT;
- }
-
- wqe_p->nr_of_data_seg = send_wr->num_sge;
-
- switch (qp->qp_type) {
- case IB_QPT_SMI:
- case IB_QPT_GSI:
- /* no break is intential here */
- case IB_QPT_UD:
- /* IB 1.2 spec C10-15 compliance */
- if (send_wr->wr.ud.remote_qkey & 0x80000000)
- remote_qkey = qp->qkey;
-
- wqe_p->destination_qp_number = send_wr->wr.ud.remote_qpn << 8;
- wqe_p->local_ee_context_qkey = remote_qkey;
- if (unlikely(!send_wr->wr.ud.ah)) {
- ehca_gen_err("wr.ud.ah is NULL. qp=%p", qp);
- return -EINVAL;
- }
- if (unlikely(send_wr->wr.ud.remote_qpn == 0)) {
- ehca_gen_err("dest QP# is 0. qp=%x", qp->real_qp_num);
- return -EINVAL;
- }
- my_av = container_of(send_wr->wr.ud.ah, struct ehca_av, ib_ah);
- wqe_p->u.ud_av.ud_av = my_av->av;
-
- /*
- * omitted check of IB_SEND_INLINE
- * since HW does not support it
- */
- for (idx = 0; idx < send_wr->num_sge; idx++) {
- wqe_p->u.ud_av.sg_list[idx].vaddr =
- send_wr->sg_list[idx].addr;
- wqe_p->u.ud_av.sg_list[idx].lkey =
- send_wr->sg_list[idx].lkey;
- wqe_p->u.ud_av.sg_list[idx].length =
- send_wr->sg_list[idx].length;
- } /* eof for idx */
- if (qp->qp_type == IB_QPT_SMI ||
- qp->qp_type == IB_QPT_GSI)
- wqe_p->u.ud_av.ud_av.pmtu = 1;
- if (qp->qp_type == IB_QPT_GSI) {
- wqe_p->pkeyi = send_wr->wr.ud.pkey_index;
-#ifdef DEBUG_GSI_SEND_WR
- trace_send_wr_ud(send_wr);
-#endif /* DEBUG_GSI_SEND_WR */
- }
- break;
-
- case IB_QPT_UC:
- if (send_wr->send_flags & IB_SEND_FENCE)
- wqe_p->wr_flag |= WQE_WRFLAG_FENCE;
- /* no break is intentional here */
- case IB_QPT_RC:
- /* TODO: atomic not implemented */
- wqe_p->u.nud.remote_virtual_address =
- send_wr->wr.rdma.remote_addr;
- wqe_p->u.nud.rkey = send_wr->wr.rdma.rkey;
-
- /*
- * omitted checking of IB_SEND_INLINE
- * since HW does not support it
- */
- dma_length = 0;
- for (idx = 0; idx < send_wr->num_sge; idx++) {
- wqe_p->u.nud.sg_list[idx].vaddr =
- send_wr->sg_list[idx].addr;
- wqe_p->u.nud.sg_list[idx].lkey =
- send_wr->sg_list[idx].lkey;
- wqe_p->u.nud.sg_list[idx].length =
- send_wr->sg_list[idx].length;
- dma_length += send_wr->sg_list[idx].length;
- } /* eof idx */
- wqe_p->u.nud.atomic_1st_op_dma_len = dma_length;
-
- /* unsolicited ack circumvention */
- if (send_wr->opcode == IB_WR_RDMA_READ) {
- /* on RDMA read, switch on and reset counters */
- qp->message_count = qp->packet_count = 0;
- qp->unsol_ack_circ = 1;
- } else
- /* else estimate #packets */
- qp->packet_count += (dma_length >> qp->mtu_shift) + 1;
-
- break;
-
- default:
- ehca_gen_err("Invalid qptype=%x", qp->qp_type);
- return -EINVAL;
- }
-
- if (ehca_debug_level >= 3) {
- ehca_gen_dbg("SEND WQE written into queue qp=%p ", qp);
- ehca_dmp( wqe_p, 16*(6 + wqe_p->nr_of_data_seg), "send wqe");
- }
- return 0;
-}
-
-/* map_ib_wc_status converts raw cqe_status to ib_wc_status */
-static inline void map_ib_wc_status(u32 cqe_status,
- enum ib_wc_status *wc_status)
-{
- if (unlikely(cqe_status & WC_STATUS_ERROR_BIT)) {
- switch (cqe_status & 0x3F) {
- case 0x01:
- case 0x21:
- *wc_status = IB_WC_LOC_LEN_ERR;
- break;
- case 0x02:
- case 0x22:
- *wc_status = IB_WC_LOC_QP_OP_ERR;
- break;
- case 0x03:
- case 0x23:
- *wc_status = IB_WC_LOC_EEC_OP_ERR;
- break;
- case 0x04:
- case 0x24:
- *wc_status = IB_WC_LOC_PROT_ERR;
- break;
- case 0x05:
- case 0x25:
- *wc_status = IB_WC_WR_FLUSH_ERR;
- break;
- case 0x06:
- *wc_status = IB_WC_MW_BIND_ERR;
- break;
- case 0x07: /* remote error - look into bits 20:24 */
- switch ((cqe_status
- & WC_STATUS_REMOTE_ERROR_FLAGS) >> 11) {
- case 0x0:
- /*
- * PSN Sequence Error!
- * couldn't find a matching status!
- */
- *wc_status = IB_WC_GENERAL_ERR;
- break;
- case 0x1:
- *wc_status = IB_WC_REM_INV_REQ_ERR;
- break;
- case 0x2:
- *wc_status = IB_WC_REM_ACCESS_ERR;
- break;
- case 0x3:
- *wc_status = IB_WC_REM_OP_ERR;
- break;
- case 0x4:
- *wc_status = IB_WC_REM_INV_RD_REQ_ERR;
- break;
- }
- break;
- case 0x08:
- *wc_status = IB_WC_RETRY_EXC_ERR;
- break;
- case 0x09:
- *wc_status = IB_WC_RNR_RETRY_EXC_ERR;
- break;
- case 0x0A:
- case 0x2D:
- *wc_status = IB_WC_REM_ABORT_ERR;
- break;
- case 0x0B:
- case 0x2E:
- *wc_status = IB_WC_INV_EECN_ERR;
- break;
- case 0x0C:
- case 0x2F:
- *wc_status = IB_WC_INV_EEC_STATE_ERR;
- break;
- case 0x0D:
- *wc_status = IB_WC_BAD_RESP_ERR;
- break;
- case 0x10:
- /* WQE purged */
- *wc_status = IB_WC_WR_FLUSH_ERR;
- break;
- default:
- *wc_status = IB_WC_FATAL_ERR;
-
- }
- } else
- *wc_status = IB_WC_SUCCESS;
-}
-
-static inline int post_one_send(struct ehca_qp *my_qp,
- struct ib_send_wr *cur_send_wr,
- int hidden)
-{
- struct ehca_wqe *wqe_p;
- int ret;
- u32 sq_map_idx;
- u64 start_offset = my_qp->ipz_squeue.current_q_offset;
-
- /* get pointer next to free WQE */
- wqe_p = ipz_qeit_get_inc(&my_qp->ipz_squeue);
- if (unlikely(!wqe_p)) {
- /* too many posted work requests: queue overflow */
- ehca_err(my_qp->ib_qp.device, "Too many posted WQEs "
- "qp_num=%x", my_qp->ib_qp.qp_num);
- return -ENOMEM;
- }
-
- /*
- * Get the index of the WQE in the send queue. The same index is used
- * for writing into the sq_map.
- */
- sq_map_idx = start_offset / my_qp->ipz_squeue.qe_size;
-
- /* write a SEND WQE into the QUEUE */
- ret = ehca_write_swqe(my_qp, wqe_p, cur_send_wr, sq_map_idx, hidden);
- /*
- * if something failed,
- * reset the free entry pointer to the start value
- */
- if (unlikely(ret)) {
- my_qp->ipz_squeue.current_q_offset = start_offset;
- ehca_err(my_qp->ib_qp.device, "Could not write WQE "
- "qp_num=%x", my_qp->ib_qp.qp_num);
- return -EINVAL;
- }
-
- return 0;
-}
-
-int ehca_post_send(struct ib_qp *qp,
- struct ib_send_wr *send_wr,
- struct ib_send_wr **bad_send_wr)
-{
- struct ehca_qp *my_qp = container_of(qp, struct ehca_qp, ib_qp);
- int wqe_cnt = 0;
- int ret = 0;
- unsigned long flags;
-
- /* Reject WR if QP is in RESET, INIT or RTR state */
- if (unlikely(my_qp->state < IB_QPS_RTS)) {
- ehca_err(qp->device, "Invalid QP state qp_state=%d qpn=%x",
- my_qp->state, qp->qp_num);
- ret = -EINVAL;
- goto out;
- }
-
- /* LOCK the QUEUE */
- spin_lock_irqsave(&my_qp->spinlock_s, flags);
-
- /* Send an empty extra RDMA read if:
- * 1) there has been an RDMA read on this connection before
- * 2) no RDMA read occurred for ACK_CIRC_THRESHOLD link packets
- * 3) we can be sure that any previous extra RDMA read has been
- * processed so we don't overflow the SQ
- */
- if (unlikely(my_qp->unsol_ack_circ &&
- my_qp->packet_count > ACK_CIRC_THRESHOLD &&
- my_qp->message_count > my_qp->init_attr.cap.max_send_wr)) {
- /* insert an empty RDMA READ to fix up the remote QP state */
- struct ib_send_wr circ_wr;
- memset(&circ_wr, 0, sizeof(circ_wr));
- circ_wr.opcode = IB_WR_RDMA_READ;
- post_one_send(my_qp, &circ_wr, 1); /* ignore retcode */
- wqe_cnt++;
- ehca_dbg(qp->device, "posted circ wr qp_num=%x", qp->qp_num);
- my_qp->message_count = my_qp->packet_count = 0;
- }
-
- /* loop processes list of send reqs */
- while (send_wr) {
- ret = post_one_send(my_qp, send_wr, 0);
- if (unlikely(ret)) {
- goto post_send_exit0;
- }
- wqe_cnt++;
- send_wr = send_wr->next;
- }
-
-post_send_exit0:
- iosync(); /* serialize GAL register access */
- hipz_update_sqa(my_qp, wqe_cnt);
- if (unlikely(ret || ehca_debug_level >= 2))
- ehca_dbg(qp->device, "ehca_qp=%p qp_num=%x wqe_cnt=%d ret=%i",
- my_qp, qp->qp_num, wqe_cnt, ret);
- my_qp->message_count += wqe_cnt;
- spin_unlock_irqrestore(&my_qp->spinlock_s, flags);
-
-out:
- if (ret)
- *bad_send_wr = send_wr;
- return ret;
-}
-
-static int internal_post_recv(struct ehca_qp *my_qp,
- struct ib_device *dev,
- struct ib_recv_wr *recv_wr,
- struct ib_recv_wr **bad_recv_wr)
-{
- struct ehca_wqe *wqe_p;
- int wqe_cnt = 0;
- int ret = 0;
- u32 rq_map_idx;
- unsigned long flags;
- struct ehca_qmap_entry *qmap_entry;
-
- if (unlikely(!HAS_RQ(my_qp))) {
- ehca_err(dev, "QP has no RQ ehca_qp=%p qp_num=%x ext_type=%d",
- my_qp, my_qp->real_qp_num, my_qp->ext_type);
- ret = -ENODEV;
- goto out;
- }
-
- /* LOCK the QUEUE */
- spin_lock_irqsave(&my_qp->spinlock_r, flags);
-
- /* loop processes list of recv reqs */
- while (recv_wr) {
- u64 start_offset = my_qp->ipz_rqueue.current_q_offset;
- /* get pointer next to free WQE */
- wqe_p = ipz_qeit_get_inc(&my_qp->ipz_rqueue);
- if (unlikely(!wqe_p)) {
- /* too many posted work requests: queue overflow */
- ret = -ENOMEM;
- ehca_err(dev, "Too many posted WQEs "
- "qp_num=%x", my_qp->real_qp_num);
- goto post_recv_exit0;
- }
- /*
- * Get the index of the WQE in the recv queue. The same index
- * is used for writing into the rq_map.
- */
- rq_map_idx = start_offset / my_qp->ipz_rqueue.qe_size;
-
- /* write a RECV WQE into the QUEUE */
- ret = ehca_write_rwqe(&my_qp->ipz_rqueue, wqe_p, recv_wr,
- rq_map_idx);
- /*
- * if something failed,
- * reset the free entry pointer to the start value
- */
- if (unlikely(ret)) {
- my_qp->ipz_rqueue.current_q_offset = start_offset;
- ret = -EINVAL;
- ehca_err(dev, "Could not write WQE "
- "qp_num=%x", my_qp->real_qp_num);
- goto post_recv_exit0;
- }
-
- qmap_entry = &my_qp->rq_map.map[rq_map_idx];
- qmap_entry->app_wr_id = get_app_wr_id(recv_wr->wr_id);
- qmap_entry->reported = 0;
- qmap_entry->cqe_req = 1;
-
- wqe_cnt++;
- recv_wr = recv_wr->next;
- } /* eof for recv_wr */
-
-post_recv_exit0:
- iosync(); /* serialize GAL register access */
- hipz_update_rqa(my_qp, wqe_cnt);
- if (unlikely(ret || ehca_debug_level >= 2))
- ehca_dbg(dev, "ehca_qp=%p qp_num=%x wqe_cnt=%d ret=%i",
- my_qp, my_qp->real_qp_num, wqe_cnt, ret);
- spin_unlock_irqrestore(&my_qp->spinlock_r, flags);
-
-out:
- if (ret)
- *bad_recv_wr = recv_wr;
-
- return ret;
-}
-
-int ehca_post_recv(struct ib_qp *qp,
- struct ib_recv_wr *recv_wr,
- struct ib_recv_wr **bad_recv_wr)
-{
- struct ehca_qp *my_qp = container_of(qp, struct ehca_qp, ib_qp);
-
- /* Reject WR if QP is in RESET state */
- if (unlikely(my_qp->state == IB_QPS_RESET)) {
- ehca_err(qp->device, "Invalid QP state qp_state=%d qpn=%x",
- my_qp->state, qp->qp_num);
- *bad_recv_wr = recv_wr;
- return -EINVAL;
- }
-
- return internal_post_recv(my_qp, qp->device, recv_wr, bad_recv_wr);
-}
-
-int ehca_post_srq_recv(struct ib_srq *srq,
- struct ib_recv_wr *recv_wr,
- struct ib_recv_wr **bad_recv_wr)
-{
- return internal_post_recv(container_of(srq, struct ehca_qp, ib_srq),
- srq->device, recv_wr, bad_recv_wr);
-}
-
-/*
- * ib_wc_opcode table converts ehca wc opcode to ib
- * Since we use zero to indicate invalid opcode, the actual ib opcode must
- * be decremented!!!
- */
-static const u8 ib_wc_opcode[255] = {
- [0x01] = IB_WC_RECV+1,
- [0x02] = IB_WC_RECV_RDMA_WITH_IMM+1,
- [0x04] = IB_WC_BIND_MW+1,
- [0x08] = IB_WC_FETCH_ADD+1,
- [0x10] = IB_WC_COMP_SWAP+1,
- [0x20] = IB_WC_RDMA_WRITE+1,
- [0x40] = IB_WC_RDMA_READ+1,
- [0x80] = IB_WC_SEND+1
-};
-
-/* internal function to poll one entry of cq */
-static inline int ehca_poll_cq_one(struct ib_cq *cq, struct ib_wc *wc)
-{
- int ret = 0, qmap_tail_idx;
- struct ehca_cq *my_cq = container_of(cq, struct ehca_cq, ib_cq);
- struct ehca_cqe *cqe;
- struct ehca_qp *my_qp;
- struct ehca_qmap_entry *qmap_entry;
- struct ehca_queue_map *qmap;
- int cqe_count = 0, is_error;
-
-repoll:
- cqe = (struct ehca_cqe *)
- ipz_qeit_get_inc_valid(&my_cq->ipz_queue);
- if (!cqe) {
- ret = -EAGAIN;
- if (ehca_debug_level >= 3)
- ehca_dbg(cq->device, "Completion queue is empty "
- "my_cq=%p cq_num=%x", my_cq, my_cq->cq_number);
- goto poll_cq_one_exit0;
- }
-
- /* prevents loads being reordered across this point */
- rmb();
-
- cqe_count++;
- if (unlikely(cqe->status & WC_STATUS_PURGE_BIT)) {
- struct ehca_qp *qp;
- int purgeflag;
- unsigned long flags;
-
- qp = ehca_cq_get_qp(my_cq, cqe->local_qp_number);
- if (!qp) {
- ehca_err(cq->device, "cq_num=%x qp_num=%x "
- "could not find qp -> ignore cqe",
- my_cq->cq_number, cqe->local_qp_number);
- ehca_dmp(cqe, 64, "cq_num=%x qp_num=%x",
- my_cq->cq_number, cqe->local_qp_number);
- /* ignore this purged cqe */
- goto repoll;
- }
- spin_lock_irqsave(&qp->spinlock_s, flags);
- purgeflag = qp->sqerr_purgeflag;
- spin_unlock_irqrestore(&qp->spinlock_s, flags);
-
- if (purgeflag) {
- ehca_dbg(cq->device,
- "Got CQE with purged bit qp_num=%x src_qp=%x",
- cqe->local_qp_number, cqe->remote_qp_number);
- if (ehca_debug_level >= 2)
- ehca_dmp(cqe, 64, "qp_num=%x src_qp=%x",
- cqe->local_qp_number,
- cqe->remote_qp_number);
- /*
- * ignore this to avoid double cqes of bad wqe
- * that caused sqe and turn off purge flag
- */
- qp->sqerr_purgeflag = 0;
- goto repoll;
- }
- }
-
- is_error = cqe->status & WC_STATUS_ERROR_BIT;
-
- /* trace error CQEs if debug_level >= 1, trace all CQEs if >= 3 */
- if (unlikely(ehca_debug_level >= 3 || (ehca_debug_level && is_error))) {
- ehca_dbg(cq->device,
- "Received %sCOMPLETION ehca_cq=%p cq_num=%x -----",
- is_error ? "ERROR " : "", my_cq, my_cq->cq_number);
- ehca_dmp(cqe, 64, "ehca_cq=%p cq_num=%x",
- my_cq, my_cq->cq_number);
- ehca_dbg(cq->device,
- "ehca_cq=%p cq_num=%x -------------------------",
- my_cq, my_cq->cq_number);
- }
-
- read_lock(&ehca_qp_idr_lock);
- my_qp = idr_find(&ehca_qp_idr, cqe->qp_token);
- read_unlock(&ehca_qp_idr_lock);
- if (!my_qp)
- goto repoll;
- wc->qp = &my_qp->ib_qp;
-
- qmap_tail_idx = get_app_wr_id(cqe->work_request_id);
- if (!(cqe->w_completion_flags & WC_SEND_RECEIVE_BIT))
- /* We got a send completion. */
- qmap = &my_qp->sq_map;
- else
- /* We got a receive completion. */
- qmap = &my_qp->rq_map;
-
- /* advance the tail pointer */
- qmap->tail = qmap_tail_idx;
-
- if (is_error) {
- /*
- * set left_to_poll to 0 because in error state, we will not
- * get any additional CQEs
- */
- my_qp->sq_map.next_wqe_idx = next_index(my_qp->sq_map.tail,
- my_qp->sq_map.entries);
- my_qp->sq_map.left_to_poll = 0;
- ehca_add_to_err_list(my_qp, 1);
-
- my_qp->rq_map.next_wqe_idx = next_index(my_qp->rq_map.tail,
- my_qp->rq_map.entries);
- my_qp->rq_map.left_to_poll = 0;
- if (HAS_RQ(my_qp))
- ehca_add_to_err_list(my_qp, 0);
- }
-
- qmap_entry = &qmap->map[qmap_tail_idx];
- if (qmap_entry->reported) {
- ehca_warn(cq->device, "Double cqe on qp_num=%#x",
- my_qp->real_qp_num);
- /* found a double cqe, discard it and read next one */
- goto repoll;
- }
-
- wc->wr_id = replace_wr_id(cqe->work_request_id, qmap_entry->app_wr_id);
- qmap_entry->reported = 1;
-
- /* if left_to_poll is decremented to 0, add the QP to the error list */
- if (qmap->left_to_poll > 0) {
- qmap->left_to_poll--;
- if ((my_qp->sq_map.left_to_poll == 0) &&
- (my_qp->rq_map.left_to_poll == 0)) {
- ehca_add_to_err_list(my_qp, 1);
- if (HAS_RQ(my_qp))
- ehca_add_to_err_list(my_qp, 0);
- }
- }
-
- /* eval ib_wc_opcode */
- wc->opcode = ib_wc_opcode[cqe->optype]-1;
- if (unlikely(wc->opcode == -1)) {
- ehca_err(cq->device, "Invalid cqe->OPType=%x cqe->status=%x "
- "ehca_cq=%p cq_num=%x",
- cqe->optype, cqe->status, my_cq, my_cq->cq_number);
- /* dump cqe for other infos */
- ehca_dmp(cqe, 64, "ehca_cq=%p cq_num=%x",
- my_cq, my_cq->cq_number);
- /* update also queue adder to throw away this entry!!! */
- goto repoll;
- }
-
- /* eval ib_wc_status */
- if (unlikely(is_error)) {
- /* complete with errors */
- map_ib_wc_status(cqe->status, &wc->status);
- wc->vendor_err = wc->status;
- } else
- wc->status = IB_WC_SUCCESS;
-
- wc->byte_len = cqe->nr_bytes_transferred;
- wc->pkey_index = cqe->pkey_index;
- wc->slid = cqe->rlid;
- wc->dlid_path_bits = cqe->dlid;
- wc->src_qp = cqe->remote_qp_number;
- /*
- * HW has "Immed data present" and "GRH present" in bits 6 and 5.
- * SW defines those in bits 1 and 0, so we can just shift and mask.
- */
- wc->wc_flags = (cqe->w_completion_flags >> 5) & 3;
- wc->ex.imm_data = cpu_to_be32(cqe->immediate_data);
- wc->sl = cqe->service_level;
-
-poll_cq_one_exit0:
- if (cqe_count > 0)
- hipz_update_feca(my_cq, cqe_count);
-
- return ret;
-}
-
-static int generate_flush_cqes(struct ehca_qp *my_qp, struct ib_cq *cq,
- struct ib_wc *wc, int num_entries,
- struct ipz_queue *ipz_queue, int on_sq)
-{
- int nr = 0;
- struct ehca_wqe *wqe;
- u64 offset;
- struct ehca_queue_map *qmap;
- struct ehca_qmap_entry *qmap_entry;
-
- if (on_sq)
- qmap = &my_qp->sq_map;
- else
- qmap = &my_qp->rq_map;
-
- qmap_entry = &qmap->map[qmap->next_wqe_idx];
-
- while ((nr < num_entries) && (qmap_entry->reported == 0)) {
- /* generate flush CQE */
-
- memset(wc, 0, sizeof(*wc));
-
- offset = qmap->next_wqe_idx * ipz_queue->qe_size;
- wqe = (struct ehca_wqe *)ipz_qeit_calc(ipz_queue, offset);
- if (!wqe) {
- ehca_err(cq->device, "Invalid wqe offset=%#llx on "
- "qp_num=%#x", offset, my_qp->real_qp_num);
- return nr;
- }
-
- wc->wr_id = replace_wr_id(wqe->work_request_id,
- qmap_entry->app_wr_id);
-
- if (on_sq) {
- switch (wqe->optype) {
- case WQE_OPTYPE_SEND:
- wc->opcode = IB_WC_SEND;
- break;
- case WQE_OPTYPE_RDMAWRITE:
- wc->opcode = IB_WC_RDMA_WRITE;
- break;
- case WQE_OPTYPE_RDMAREAD:
- wc->opcode = IB_WC_RDMA_READ;
- break;
- default:
- ehca_err(cq->device, "Invalid optype=%x",
- wqe->optype);
- return nr;
- }
- } else
- wc->opcode = IB_WC_RECV;
-
- if (wqe->wr_flag & WQE_WRFLAG_IMM_DATA_PRESENT) {
- wc->ex.imm_data = wqe->immediate_data;
- wc->wc_flags |= IB_WC_WITH_IMM;
- }
-
- wc->status = IB_WC_WR_FLUSH_ERR;
-
- wc->qp = &my_qp->ib_qp;
-
- /* mark as reported and advance next_wqe pointer */
- qmap_entry->reported = 1;
- qmap->next_wqe_idx = next_index(qmap->next_wqe_idx,
- qmap->entries);
- qmap_entry = &qmap->map[qmap->next_wqe_idx];
-
- wc++; nr++;
- }
-
- return nr;
-
-}
-
-int ehca_poll_cq(struct ib_cq *cq, int num_entries, struct ib_wc *wc)
-{
- struct ehca_cq *my_cq = container_of(cq, struct ehca_cq, ib_cq);
- int nr;
- struct ehca_qp *err_qp;
- struct ib_wc *current_wc = wc;
- int ret = 0;
- unsigned long flags;
- int entries_left = num_entries;
-
- if (num_entries < 1) {
- ehca_err(cq->device, "Invalid num_entries=%d ehca_cq=%p "
- "cq_num=%x", num_entries, my_cq, my_cq->cq_number);
- ret = -EINVAL;
- goto poll_cq_exit0;
- }
-
- spin_lock_irqsave(&my_cq->spinlock, flags);
-
- /* generate flush cqes for send queues */
- list_for_each_entry(err_qp, &my_cq->sqp_err_list, sq_err_node) {
- nr = generate_flush_cqes(err_qp, cq, current_wc, entries_left,
- &err_qp->ipz_squeue, 1);
- entries_left -= nr;
- current_wc += nr;
-
- if (entries_left == 0)
- break;
- }
-
- /* generate flush cqes for receive queues */
- list_for_each_entry(err_qp, &my_cq->rqp_err_list, rq_err_node) {
- nr = generate_flush_cqes(err_qp, cq, current_wc, entries_left,
- &err_qp->ipz_rqueue, 0);
- entries_left -= nr;
- current_wc += nr;
-
- if (entries_left == 0)
- break;
- }
-
- for (nr = 0; nr < entries_left; nr++) {
- ret = ehca_poll_cq_one(cq, current_wc);
- if (ret)
- break;
- current_wc++;
- } /* eof for nr */
- entries_left -= nr;
-
- spin_unlock_irqrestore(&my_cq->spinlock, flags);
- if (ret == -EAGAIN || !ret)
- ret = num_entries - entries_left;
-
-poll_cq_exit0:
- return ret;
-}
-
-int ehca_req_notify_cq(struct ib_cq *cq, enum ib_cq_notify_flags notify_flags)
-{
- struct ehca_cq *my_cq = container_of(cq, struct ehca_cq, ib_cq);
- int ret = 0;
-
- switch (notify_flags & IB_CQ_SOLICITED_MASK) {
- case IB_CQ_SOLICITED:
- hipz_set_cqx_n0(my_cq, 1);
- break;
- case IB_CQ_NEXT_COMP:
- hipz_set_cqx_n1(my_cq, 1);
- break;
- default:
- return -EINVAL;
- }
-
- if (notify_flags & IB_CQ_REPORT_MISSED_EVENTS) {
- unsigned long spl_flags;
- spin_lock_irqsave(&my_cq->spinlock, spl_flags);
- ret = ipz_qeit_is_valid(&my_cq->ipz_queue);
- spin_unlock_irqrestore(&my_cq->spinlock, spl_flags);
- }
-
- return ret;
-}