From 8d91c1e411f55d7ea91b1183a2e9f8088fb4d5be Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Tue, 15 Dec 2015 14:52:16 -0300 Subject: Linux-libre 4.3.2-gnu --- drivers/infiniband/hw/amso1100/c2_cq.c | 440 --------------------------------- 1 file changed, 440 deletions(-) delete mode 100644 drivers/infiniband/hw/amso1100/c2_cq.c (limited to 'drivers/infiniband/hw/amso1100/c2_cq.c') diff --git a/drivers/infiniband/hw/amso1100/c2_cq.c b/drivers/infiniband/hw/amso1100/c2_cq.c deleted file mode 100644 index 1b63185b4..000000000 --- a/drivers/infiniband/hw/amso1100/c2_cq.c +++ /dev/null @@ -1,440 +0,0 @@ -/* - * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved. - * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. - * Copyright (c) 2005 Cisco Systems, Inc. All rights reserved. - * Copyright (c) 2005 Mellanox Technologies. All rights reserved. - * Copyright (c) 2004 Voltaire, Inc. All rights reserved. - * Copyright (c) 2005 Open Grid Computing, Inc. All rights reserved. - * - * 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 - * OpenIB.org BSD license below: - * - * 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. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, - * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF - * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND - * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS - * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN - * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - * - */ -#include - -#include "c2.h" -#include "c2_vq.h" -#include "c2_status.h" - -#define C2_CQ_MSG_SIZE ((sizeof(struct c2wr_ce) + 32-1) & ~(32-1)) - -static struct c2_cq *c2_cq_get(struct c2_dev *c2dev, int cqn) -{ - struct c2_cq *cq; - unsigned long flags; - - spin_lock_irqsave(&c2dev->lock, flags); - cq = c2dev->qptr_array[cqn]; - if (!cq) { - spin_unlock_irqrestore(&c2dev->lock, flags); - return NULL; - } - atomic_inc(&cq->refcount); - spin_unlock_irqrestore(&c2dev->lock, flags); - return cq; -} - -static void c2_cq_put(struct c2_cq *cq) -{ - if (atomic_dec_and_test(&cq->refcount)) - wake_up(&cq->wait); -} - -void c2_cq_event(struct c2_dev *c2dev, u32 mq_index) -{ - struct c2_cq *cq; - - cq = c2_cq_get(c2dev, mq_index); - if (!cq) { - printk("discarding events on destroyed CQN=%d\n", mq_index); - return; - } - - (*cq->ibcq.comp_handler) (&cq->ibcq, cq->ibcq.cq_context); - c2_cq_put(cq); -} - -void c2_cq_clean(struct c2_dev *c2dev, struct c2_qp *qp, u32 mq_index) -{ - struct c2_cq *cq; - struct c2_mq *q; - - cq = c2_cq_get(c2dev, mq_index); - if (!cq) - return; - - spin_lock_irq(&cq->lock); - q = &cq->mq; - if (q && !c2_mq_empty(q)) { - u16 priv = q->priv; - struct c2wr_ce *msg; - - while (priv != be16_to_cpu(*q->shared)) { - msg = (struct c2wr_ce *) - (q->msg_pool.host + priv * q->msg_size); - if (msg->qp_user_context == (u64) (unsigned long) qp) { - msg->qp_user_context = (u64) 0; - } - priv = (priv + 1) % q->q_size; - } - } - spin_unlock_irq(&cq->lock); - c2_cq_put(cq); -} - -static inline enum ib_wc_status c2_cqe_status_to_openib(u8 status) -{ - switch (status) { - case C2_OK: - return IB_WC_SUCCESS; - case CCERR_FLUSHED: - return IB_WC_WR_FLUSH_ERR; - case CCERR_BASE_AND_BOUNDS_VIOLATION: - return IB_WC_LOC_PROT_ERR; - case CCERR_ACCESS_VIOLATION: - return IB_WC_LOC_ACCESS_ERR; - case CCERR_TOTAL_LENGTH_TOO_BIG: - return IB_WC_LOC_LEN_ERR; - case CCERR_INVALID_WINDOW: - return IB_WC_MW_BIND_ERR; - default: - return IB_WC_GENERAL_ERR; - } -} - - -static inline int c2_poll_one(struct c2_dev *c2dev, - struct c2_cq *cq, struct ib_wc *entry) -{ - struct c2wr_ce *ce; - struct c2_qp *qp; - int is_recv = 0; - - ce = c2_mq_consume(&cq->mq); - if (!ce) { - return -EAGAIN; - } - - /* - * if the qp returned is null then this qp has already - * been freed and we are unable process the completion. - * try pulling the next message - */ - while ((qp = - (struct c2_qp *) (unsigned long) ce->qp_user_context) == NULL) { - c2_mq_free(&cq->mq); - ce = c2_mq_consume(&cq->mq); - if (!ce) - return -EAGAIN; - } - - entry->status = c2_cqe_status_to_openib(c2_wr_get_result(ce)); - entry->wr_id = ce->hdr.context; - entry->qp = &qp->ibqp; - entry->wc_flags = 0; - entry->slid = 0; - entry->sl = 0; - entry->src_qp = 0; - entry->dlid_path_bits = 0; - entry->pkey_index = 0; - - switch (c2_wr_get_id(ce)) { - case C2_WR_TYPE_SEND: - entry->opcode = IB_WC_SEND; - break; - case C2_WR_TYPE_RDMA_WRITE: - entry->opcode = IB_WC_RDMA_WRITE; - break; - case C2_WR_TYPE_RDMA_READ: - entry->opcode = IB_WC_RDMA_READ; - break; - case C2_WR_TYPE_BIND_MW: - entry->opcode = IB_WC_BIND_MW; - break; - case C2_WR_TYPE_RECV: - entry->byte_len = be32_to_cpu(ce->bytes_rcvd); - entry->opcode = IB_WC_RECV; - is_recv = 1; - break; - default: - break; - } - - /* consume the WQEs */ - if (is_recv) - c2_mq_lconsume(&qp->rq_mq, 1); - else - c2_mq_lconsume(&qp->sq_mq, - be32_to_cpu(c2_wr_get_wqe_count(ce)) + 1); - - /* free the message */ - c2_mq_free(&cq->mq); - - return 0; -} - -int c2_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *entry) -{ - struct c2_dev *c2dev = to_c2dev(ibcq->device); - struct c2_cq *cq = to_c2cq(ibcq); - unsigned long flags; - int npolled, err; - - spin_lock_irqsave(&cq->lock, flags); - - for (npolled = 0; npolled < num_entries; ++npolled) { - - err = c2_poll_one(c2dev, cq, entry + npolled); - if (err) - break; - } - - spin_unlock_irqrestore(&cq->lock, flags); - - return npolled; -} - -int c2_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags notify_flags) -{ - struct c2_mq_shared __iomem *shared; - struct c2_cq *cq; - unsigned long flags; - int ret = 0; - - cq = to_c2cq(ibcq); - shared = cq->mq.peer; - - if ((notify_flags & IB_CQ_SOLICITED_MASK) == IB_CQ_NEXT_COMP) - writeb(C2_CQ_NOTIFICATION_TYPE_NEXT, &shared->notification_type); - else if ((notify_flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED) - writeb(C2_CQ_NOTIFICATION_TYPE_NEXT_SE, &shared->notification_type); - else - return -EINVAL; - - writeb(CQ_WAIT_FOR_DMA | CQ_ARMED, &shared->armed); - - /* - * Now read back shared->armed to make the PCI - * write synchronous. This is necessary for - * correct cq notification semantics. - */ - readb(&shared->armed); - - if (notify_flags & IB_CQ_REPORT_MISSED_EVENTS) { - spin_lock_irqsave(&cq->lock, flags); - ret = !c2_mq_empty(&cq->mq); - spin_unlock_irqrestore(&cq->lock, flags); - } - - return ret; -} - -static void c2_free_cq_buf(struct c2_dev *c2dev, struct c2_mq *mq) -{ - dma_free_coherent(&c2dev->pcidev->dev, mq->q_size * mq->msg_size, - mq->msg_pool.host, dma_unmap_addr(mq, mapping)); -} - -static int c2_alloc_cq_buf(struct c2_dev *c2dev, struct c2_mq *mq, - size_t q_size, size_t msg_size) -{ - u8 *pool_start; - - if (q_size > SIZE_MAX / msg_size) - return -EINVAL; - - pool_start = dma_alloc_coherent(&c2dev->pcidev->dev, q_size * msg_size, - &mq->host_dma, GFP_KERNEL); - if (!pool_start) - return -ENOMEM; - - c2_mq_rep_init(mq, - 0, /* index (currently unknown) */ - q_size, - msg_size, - pool_start, - NULL, /* peer (currently unknown) */ - C2_MQ_HOST_TARGET); - - dma_unmap_addr_set(mq, mapping, mq->host_dma); - - return 0; -} - -int c2_init_cq(struct c2_dev *c2dev, int entries, - struct c2_ucontext *ctx, struct c2_cq *cq) -{ - struct c2wr_cq_create_req wr; - struct c2wr_cq_create_rep *reply; - unsigned long peer_pa; - struct c2_vq_req *vq_req; - int err; - - might_sleep(); - - cq->ibcq.cqe = entries - 1; - cq->is_kernel = !ctx; - - /* Allocate a shared pointer */ - cq->mq.shared = c2_alloc_mqsp(c2dev, c2dev->kern_mqsp_pool, - &cq->mq.shared_dma, GFP_KERNEL); - if (!cq->mq.shared) - return -ENOMEM; - - /* Allocate pages for the message pool */ - err = c2_alloc_cq_buf(c2dev, &cq->mq, entries + 1, C2_CQ_MSG_SIZE); - if (err) - goto bail0; - - vq_req = vq_req_alloc(c2dev); - if (!vq_req) { - err = -ENOMEM; - goto bail1; - } - - memset(&wr, 0, sizeof(wr)); - c2_wr_set_id(&wr, CCWR_CQ_CREATE); - wr.hdr.context = (unsigned long) vq_req; - wr.rnic_handle = c2dev->adapter_handle; - wr.msg_size = cpu_to_be32(cq->mq.msg_size); - wr.depth = cpu_to_be32(cq->mq.q_size); - wr.shared_ht = cpu_to_be64(cq->mq.shared_dma); - wr.msg_pool = cpu_to_be64(cq->mq.host_dma); - wr.user_context = (u64) (unsigned long) (cq); - - vq_req_get(c2dev, vq_req); - - err = vq_send_wr(c2dev, (union c2wr *) & wr); - if (err) { - vq_req_put(c2dev, vq_req); - goto bail2; - } - - err = vq_wait_for_reply(c2dev, vq_req); - if (err) - goto bail2; - - reply = (struct c2wr_cq_create_rep *) (unsigned long) (vq_req->reply_msg); - if (!reply) { - err = -ENOMEM; - goto bail2; - } - - if ((err = c2_errno(reply)) != 0) - goto bail3; - - cq->adapter_handle = reply->cq_handle; - cq->mq.index = be32_to_cpu(reply->mq_index); - - peer_pa = c2dev->pa + be32_to_cpu(reply->adapter_shared); - cq->mq.peer = ioremap_nocache(peer_pa, PAGE_SIZE); - if (!cq->mq.peer) { - err = -ENOMEM; - goto bail3; - } - - vq_repbuf_free(c2dev, reply); - vq_req_free(c2dev, vq_req); - - spin_lock_init(&cq->lock); - atomic_set(&cq->refcount, 1); - init_waitqueue_head(&cq->wait); - - /* - * Use the MQ index allocated by the adapter to - * store the CQ in the qptr_array - */ - cq->cqn = cq->mq.index; - c2dev->qptr_array[cq->cqn] = cq; - - return 0; - - bail3: - vq_repbuf_free(c2dev, reply); - bail2: - vq_req_free(c2dev, vq_req); - bail1: - c2_free_cq_buf(c2dev, &cq->mq); - bail0: - c2_free_mqsp(cq->mq.shared); - - return err; -} - -void c2_free_cq(struct c2_dev *c2dev, struct c2_cq *cq) -{ - int err; - struct c2_vq_req *vq_req; - struct c2wr_cq_destroy_req wr; - struct c2wr_cq_destroy_rep *reply; - - might_sleep(); - - /* Clear CQ from the qptr array */ - spin_lock_irq(&c2dev->lock); - c2dev->qptr_array[cq->mq.index] = NULL; - atomic_dec(&cq->refcount); - spin_unlock_irq(&c2dev->lock); - - wait_event(cq->wait, !atomic_read(&cq->refcount)); - - vq_req = vq_req_alloc(c2dev); - if (!vq_req) { - goto bail0; - } - - memset(&wr, 0, sizeof(wr)); - c2_wr_set_id(&wr, CCWR_CQ_DESTROY); - wr.hdr.context = (unsigned long) vq_req; - wr.rnic_handle = c2dev->adapter_handle; - wr.cq_handle = cq->adapter_handle; - - vq_req_get(c2dev, vq_req); - - err = vq_send_wr(c2dev, (union c2wr *) & wr); - if (err) { - vq_req_put(c2dev, vq_req); - goto bail1; - } - - err = vq_wait_for_reply(c2dev, vq_req); - if (err) - goto bail1; - - reply = (struct c2wr_cq_destroy_rep *) (unsigned long) (vq_req->reply_msg); - if (reply) - vq_repbuf_free(c2dev, reply); - bail1: - vq_req_free(c2dev, vq_req); - bail0: - if (cq->is_kernel) { - c2_free_cq_buf(c2dev, &cq->mq); - } - - return; -} -- cgit v1.2.3-54-g00ecf