2013-07-07 21:25:49 +07:00
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/*
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* Copyright (c) 2013, Mellanox Technologies inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/module.h>
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#include <linux/mlx5/qp.h>
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#include <linux/mlx5/srq.h>
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#include <linux/slab.h>
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#include <rdma/ib_umem.h>
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#include "mlx5_ib.h"
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#include "user.h"
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/* not supported currently */
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static int srq_signature;
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static void *get_wqe(struct mlx5_ib_srq *srq, int n)
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{
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return mlx5_buf_offset(&srq->buf, n << srq->msrq.wqe_shift);
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}
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static void mlx5_ib_srq_event(struct mlx5_core_srq *srq, enum mlx5_event type)
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{
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struct ib_event event;
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struct ib_srq *ibsrq = &to_mibsrq(srq)->ibsrq;
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if (ibsrq->event_handler) {
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event.device = ibsrq->device;
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event.element.srq = ibsrq;
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switch (type) {
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case MLX5_EVENT_TYPE_SRQ_RQ_LIMIT:
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event.event = IB_EVENT_SRQ_LIMIT_REACHED;
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break;
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case MLX5_EVENT_TYPE_SRQ_CATAS_ERROR:
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event.event = IB_EVENT_SRQ_ERR;
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break;
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default:
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pr_warn("mlx5_ib: Unexpected event type %d on SRQ %06x\n",
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type, srq->srqn);
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return;
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}
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ibsrq->event_handler(&event, ibsrq->srq_context);
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}
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}
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static int create_srq_user(struct ib_pd *pd, struct mlx5_ib_srq *srq,
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struct mlx5_create_srq_mbox_in **in,
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struct ib_udata *udata, int buf_size, int *inlen)
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{
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struct mlx5_ib_dev *dev = to_mdev(pd->device);
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struct mlx5_ib_create_srq ucmd;
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int err;
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int npages;
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int page_shift;
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int ncont;
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u32 offset;
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if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd))) {
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mlx5_ib_dbg(dev, "failed copy udata\n");
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return -EFAULT;
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}
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srq->wq_sig = !!(ucmd.flags & MLX5_SRQ_FLAG_SIGNATURE);
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srq->umem = ib_umem_get(pd->uobject->context, ucmd.buf_addr, buf_size,
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0, 0);
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if (IS_ERR(srq->umem)) {
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mlx5_ib_dbg(dev, "failed umem get, size %d\n", buf_size);
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err = PTR_ERR(srq->umem);
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return err;
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}
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mlx5_ib_cont_pages(srq->umem, ucmd.buf_addr, &npages,
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&page_shift, &ncont, NULL);
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err = mlx5_ib_get_buf_offset(ucmd.buf_addr, page_shift,
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&offset);
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if (err) {
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mlx5_ib_warn(dev, "bad offset\n");
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goto err_umem;
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}
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*inlen = sizeof(**in) + sizeof(*(*in)->pas) * ncont;
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*in = mlx5_vzalloc(*inlen);
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if (!(*in)) {
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err = -ENOMEM;
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goto err_umem;
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}
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mlx5_ib_populate_pas(dev, srq->umem, page_shift, (*in)->pas, 0);
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err = mlx5_ib_db_map_user(to_mucontext(pd->uobject->context),
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ucmd.db_addr, &srq->db);
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if (err) {
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mlx5_ib_dbg(dev, "map doorbell failed\n");
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goto err_in;
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}
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2013-10-24 16:01:03 +07:00
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(*in)->ctx.log_pg_sz = page_shift - MLX5_ADAPTER_PAGE_SHIFT;
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2013-07-07 21:25:49 +07:00
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(*in)->ctx.pgoff_cqn = cpu_to_be32(offset << 26);
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return 0;
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err_in:
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mlx5_vfree(*in);
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err_umem:
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ib_umem_release(srq->umem);
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return err;
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}
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static int create_srq_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_srq *srq,
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struct mlx5_create_srq_mbox_in **in, int buf_size,
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int *inlen)
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{
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int err;
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int i;
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struct mlx5_wqe_srq_next_seg *next;
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int page_shift;
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int npages;
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err = mlx5_db_alloc(&dev->mdev, &srq->db);
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if (err) {
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mlx5_ib_warn(dev, "alloc dbell rec failed\n");
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return err;
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}
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*srq->db.db = 0;
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if (mlx5_buf_alloc(&dev->mdev, buf_size, PAGE_SIZE * 2, &srq->buf)) {
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mlx5_ib_dbg(dev, "buf alloc failed\n");
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err = -ENOMEM;
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goto err_db;
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}
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page_shift = srq->buf.page_shift;
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srq->head = 0;
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srq->tail = srq->msrq.max - 1;
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srq->wqe_ctr = 0;
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for (i = 0; i < srq->msrq.max; i++) {
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next = get_wqe(srq, i);
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next->next_wqe_index =
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cpu_to_be16((i + 1) & (srq->msrq.max - 1));
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}
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npages = DIV_ROUND_UP(srq->buf.npages, 1 << (page_shift - PAGE_SHIFT));
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mlx5_ib_dbg(dev, "buf_size %d, page_shift %d, npages %d, calc npages %d\n",
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buf_size, page_shift, srq->buf.npages, npages);
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*inlen = sizeof(**in) + sizeof(*(*in)->pas) * npages;
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*in = mlx5_vzalloc(*inlen);
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if (!*in) {
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err = -ENOMEM;
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goto err_buf;
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}
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mlx5_fill_page_array(&srq->buf, (*in)->pas);
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srq->wrid = kmalloc(srq->msrq.max * sizeof(u64), GFP_KERNEL);
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if (!srq->wrid) {
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mlx5_ib_dbg(dev, "kmalloc failed %lu\n",
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(unsigned long)(srq->msrq.max * sizeof(u64)));
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err = -ENOMEM;
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goto err_in;
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}
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srq->wq_sig = !!srq_signature;
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2013-10-24 16:01:03 +07:00
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(*in)->ctx.log_pg_sz = page_shift - MLX5_ADAPTER_PAGE_SHIFT;
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2013-07-07 21:25:49 +07:00
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return 0;
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err_in:
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mlx5_vfree(*in);
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err_buf:
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mlx5_buf_free(&dev->mdev, &srq->buf);
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err_db:
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mlx5_db_free(&dev->mdev, &srq->db);
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return err;
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}
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static void destroy_srq_user(struct ib_pd *pd, struct mlx5_ib_srq *srq)
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{
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mlx5_ib_db_unmap_user(to_mucontext(pd->uobject->context), &srq->db);
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ib_umem_release(srq->umem);
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}
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static void destroy_srq_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_srq *srq)
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{
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kfree(srq->wrid);
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mlx5_buf_free(&dev->mdev, &srq->buf);
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mlx5_db_free(&dev->mdev, &srq->db);
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}
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struct ib_srq *mlx5_ib_create_srq(struct ib_pd *pd,
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struct ib_srq_init_attr *init_attr,
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struct ib_udata *udata)
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{
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struct mlx5_ib_dev *dev = to_mdev(pd->device);
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struct mlx5_ib_srq *srq;
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int desc_size;
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int buf_size;
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int err;
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struct mlx5_create_srq_mbox_in *uninitialized_var(in);
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int uninitialized_var(inlen);
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int is_xrc;
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u32 flgs, xrcdn;
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/* Sanity check SRQ size before proceeding */
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if (init_attr->attr.max_wr >= dev->mdev.caps.max_srq_wqes) {
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mlx5_ib_dbg(dev, "max_wr %d, cap %d\n",
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init_attr->attr.max_wr,
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dev->mdev.caps.max_srq_wqes);
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return ERR_PTR(-EINVAL);
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}
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srq = kmalloc(sizeof(*srq), GFP_KERNEL);
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if (!srq)
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return ERR_PTR(-ENOMEM);
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mutex_init(&srq->mutex);
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spin_lock_init(&srq->lock);
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srq->msrq.max = roundup_pow_of_two(init_attr->attr.max_wr + 1);
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srq->msrq.max_gs = init_attr->attr.max_sge;
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desc_size = sizeof(struct mlx5_wqe_srq_next_seg) +
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srq->msrq.max_gs * sizeof(struct mlx5_wqe_data_seg);
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desc_size = roundup_pow_of_two(desc_size);
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desc_size = max_t(int, 32, desc_size);
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srq->msrq.max_avail_gather = (desc_size - sizeof(struct mlx5_wqe_srq_next_seg)) /
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sizeof(struct mlx5_wqe_data_seg);
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srq->msrq.wqe_shift = ilog2(desc_size);
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buf_size = srq->msrq.max * desc_size;
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mlx5_ib_dbg(dev, "desc_size 0x%x, req wr 0x%x, srq size 0x%x, max_gs 0x%x, max_avail_gather 0x%x\n",
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desc_size, init_attr->attr.max_wr, srq->msrq.max, srq->msrq.max_gs,
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srq->msrq.max_avail_gather);
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if (pd->uobject)
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err = create_srq_user(pd, srq, &in, udata, buf_size, &inlen);
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else
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err = create_srq_kernel(dev, srq, &in, buf_size, &inlen);
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if (err) {
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mlx5_ib_warn(dev, "create srq %s failed, err %d\n",
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pd->uobject ? "user" : "kernel", err);
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goto err_srq;
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}
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is_xrc = (init_attr->srq_type == IB_SRQT_XRC);
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in->ctx.state_log_sz = ilog2(srq->msrq.max);
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flgs = ((srq->msrq.wqe_shift - 4) | (is_xrc << 5) | (srq->wq_sig << 7)) << 24;
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xrcdn = 0;
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if (is_xrc) {
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xrcdn = to_mxrcd(init_attr->ext.xrc.xrcd)->xrcdn;
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in->ctx.pgoff_cqn |= cpu_to_be32(to_mcq(init_attr->ext.xrc.cq)->mcq.cqn);
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} else if (init_attr->srq_type == IB_SRQT_BASIC) {
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xrcdn = to_mxrcd(dev->devr.x0)->xrcdn;
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in->ctx.pgoff_cqn |= cpu_to_be32(to_mcq(dev->devr.c0)->mcq.cqn);
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}
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in->ctx.flags_xrcd = cpu_to_be32((flgs & 0xFF000000) | (xrcdn & 0xFFFFFF));
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in->ctx.pd = cpu_to_be32(to_mpd(pd)->pdn);
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in->ctx.db_record = cpu_to_be64(srq->db.dma);
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err = mlx5_core_create_srq(&dev->mdev, &srq->msrq, in, inlen);
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mlx5_vfree(in);
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if (err) {
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mlx5_ib_dbg(dev, "create SRQ failed, err %d\n", err);
|
2013-09-11 20:35:24 +07:00
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goto err_usr_kern_srq;
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2013-07-07 21:25:49 +07:00
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}
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mlx5_ib_dbg(dev, "create SRQ with srqn 0x%x\n", srq->msrq.srqn);
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srq->msrq.event = mlx5_ib_srq_event;
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srq->ibsrq.ext.xrc.srq_num = srq->msrq.srqn;
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if (pd->uobject)
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if (ib_copy_to_udata(udata, &srq->msrq.srqn, sizeof(__u32))) {
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mlx5_ib_dbg(dev, "copy to user failed\n");
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err = -EFAULT;
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goto err_core;
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}
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init_attr->attr.max_wr = srq->msrq.max - 1;
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return &srq->ibsrq;
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err_core:
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mlx5_core_destroy_srq(&dev->mdev, &srq->msrq);
|
2013-09-11 20:35:24 +07:00
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err_usr_kern_srq:
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2013-07-07 21:25:49 +07:00
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if (pd->uobject)
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destroy_srq_user(pd, srq);
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else
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destroy_srq_kernel(dev, srq);
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err_srq:
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kfree(srq);
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return ERR_PTR(err);
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}
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int mlx5_ib_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
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enum ib_srq_attr_mask attr_mask, struct ib_udata *udata)
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{
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struct mlx5_ib_dev *dev = to_mdev(ibsrq->device);
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struct mlx5_ib_srq *srq = to_msrq(ibsrq);
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|
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int ret;
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|
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/* We don't support resizing SRQs yet */
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|
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if (attr_mask & IB_SRQ_MAX_WR)
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|
return -EINVAL;
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if (attr_mask & IB_SRQ_LIMIT) {
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if (attr->srq_limit >= srq->msrq.max)
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return -EINVAL;
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mutex_lock(&srq->mutex);
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ret = mlx5_core_arm_srq(&dev->mdev, &srq->msrq, attr->srq_limit, 1);
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mutex_unlock(&srq->mutex);
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if (ret)
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return ret;
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}
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return 0;
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}
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|
|
int mlx5_ib_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *srq_attr)
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|
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{
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struct mlx5_ib_dev *dev = to_mdev(ibsrq->device);
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struct mlx5_ib_srq *srq = to_msrq(ibsrq);
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|
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int ret;
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|
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struct mlx5_query_srq_mbox_out *out;
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out = kzalloc(sizeof(*out), GFP_KERNEL);
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if (!out)
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return -ENOMEM;
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ret = mlx5_core_query_srq(&dev->mdev, &srq->msrq, out);
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if (ret)
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|
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goto out_box;
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srq_attr->srq_limit = be16_to_cpu(out->ctx.lwm);
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srq_attr->max_wr = srq->msrq.max - 1;
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srq_attr->max_sge = srq->msrq.max_gs;
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out_box:
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|
kfree(out);
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return ret;
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|
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}
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|
|
|
|
|
|
|
int mlx5_ib_destroy_srq(struct ib_srq *srq)
|
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|
|
{
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|
|
|
struct mlx5_ib_dev *dev = to_mdev(srq->device);
|
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|
|
struct mlx5_ib_srq *msrq = to_msrq(srq);
|
|
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|
|
mlx5_core_destroy_srq(&dev->mdev, &msrq->msrq);
|
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|
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|
|
if (srq->uobject) {
|
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|
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mlx5_ib_db_unmap_user(to_mucontext(srq->uobject->context), &msrq->db);
|
|
|
|
ib_umem_release(msrq->umem);
|
|
|
|
} else {
|
2013-10-23 13:53:16 +07:00
|
|
|
destroy_srq_kernel(dev, msrq);
|
2013-07-07 21:25:49 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
kfree(srq);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
void mlx5_ib_free_srq_wqe(struct mlx5_ib_srq *srq, int wqe_index)
|
|
|
|
{
|
|
|
|
struct mlx5_wqe_srq_next_seg *next;
|
|
|
|
|
|
|
|
/* always called with interrupts disabled. */
|
|
|
|
spin_lock(&srq->lock);
|
|
|
|
|
|
|
|
next = get_wqe(srq, srq->tail);
|
|
|
|
next->next_wqe_index = cpu_to_be16(wqe_index);
|
|
|
|
srq->tail = wqe_index;
|
|
|
|
|
|
|
|
spin_unlock(&srq->lock);
|
|
|
|
}
|
|
|
|
|
|
|
|
int mlx5_ib_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
|
|
|
|
struct ib_recv_wr **bad_wr)
|
|
|
|
{
|
|
|
|
struct mlx5_ib_srq *srq = to_msrq(ibsrq);
|
|
|
|
struct mlx5_wqe_srq_next_seg *next;
|
|
|
|
struct mlx5_wqe_data_seg *scat;
|
|
|
|
unsigned long flags;
|
|
|
|
int err = 0;
|
|
|
|
int nreq;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
spin_lock_irqsave(&srq->lock, flags);
|
|
|
|
|
|
|
|
for (nreq = 0; wr; nreq++, wr = wr->next) {
|
|
|
|
if (unlikely(wr->num_sge > srq->msrq.max_gs)) {
|
|
|
|
err = -EINVAL;
|
|
|
|
*bad_wr = wr;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (unlikely(srq->head == srq->tail)) {
|
|
|
|
err = -ENOMEM;
|
|
|
|
*bad_wr = wr;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
srq->wrid[srq->head] = wr->wr_id;
|
|
|
|
|
|
|
|
next = get_wqe(srq, srq->head);
|
|
|
|
srq->head = be16_to_cpu(next->next_wqe_index);
|
|
|
|
scat = (struct mlx5_wqe_data_seg *)(next + 1);
|
|
|
|
|
|
|
|
for (i = 0; i < wr->num_sge; i++) {
|
|
|
|
scat[i].byte_count = cpu_to_be32(wr->sg_list[i].length);
|
|
|
|
scat[i].lkey = cpu_to_be32(wr->sg_list[i].lkey);
|
|
|
|
scat[i].addr = cpu_to_be64(wr->sg_list[i].addr);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (i < srq->msrq.max_avail_gather) {
|
|
|
|
scat[i].byte_count = 0;
|
|
|
|
scat[i].lkey = cpu_to_be32(MLX5_INVALID_LKEY);
|
|
|
|
scat[i].addr = 0;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (likely(nreq)) {
|
|
|
|
srq->wqe_ctr += nreq;
|
|
|
|
|
|
|
|
/* Make sure that descriptors are written before
|
|
|
|
* doorbell record.
|
|
|
|
*/
|
|
|
|
wmb();
|
|
|
|
|
|
|
|
*srq->db.db = cpu_to_be32(srq->wqe_ctr);
|
|
|
|
}
|
|
|
|
|
|
|
|
spin_unlock_irqrestore(&srq->lock, flags);
|
|
|
|
|
|
|
|
return err;
|
|
|
|
}
|