| /* |
| * 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 "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 = (struct c2wr_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 = (struct c2wr_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 notify) |
| { |
| struct c2_mq_shared __iomem *shared; |
| struct c2_cq *cq; |
| |
| cq = to_c2cq(ibcq); |
| shared = cq->mq.peer; |
| |
| if (notify == IB_CQ_NEXT_COMP) |
| writeb(C2_CQ_NOTIFICATION_TYPE_NEXT, &shared->notification_type); |
| else if (notify == 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); |
| |
| return 0; |
| } |
| |
| 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, pci_unmap_addr(mq, mapping)); |
| } |
| |
| static int c2_alloc_cq_buf(struct c2_dev *c2dev, struct c2_mq *mq, int q_size, |
| int msg_size) |
| { |
| u8 *pool_start; |
| |
| 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); |
| |
| pci_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); |
| |
| 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; |
| } |