diff options
Diffstat (limited to 'drivers/infiniband/hw/mlx4/mad.c')
| -rw-r--r-- | drivers/infiniband/hw/mlx4/mad.c | 684 |
1 files changed, 684 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/mlx4/mad.c b/drivers/infiniband/hw/mlx4/mad.c index 9c2ae7efd00f..e98849338a94 100644 --- a/drivers/infiniband/hw/mlx4/mad.c +++ b/drivers/infiniband/hw/mlx4/mad.c @@ -44,6 +44,35 @@ enum { MLX4_IB_VENDOR_CLASS2 = 0xa }; +#define MLX4_TUN_SEND_WRID_SHIFT 34 +#define MLX4_TUN_QPN_SHIFT 32 +#define MLX4_TUN_WRID_RECV (((u64) 1) << MLX4_TUN_SEND_WRID_SHIFT) +#define MLX4_TUN_SET_WRID_QPN(a) (((u64) ((a) & 0x3)) << MLX4_TUN_QPN_SHIFT) + +#define MLX4_TUN_IS_RECV(a) (((a) >> MLX4_TUN_SEND_WRID_SHIFT) & 0x1) +#define MLX4_TUN_WRID_QPN(a) (((a) >> MLX4_TUN_QPN_SHIFT) & 0x3) + +struct mlx4_mad_rcv_buf { + struct ib_grh grh; + u8 payload[256]; +} __packed; + +struct mlx4_mad_snd_buf { + u8 payload[256]; +} __packed; + +struct mlx4_tunnel_mad { + struct ib_grh grh; + struct mlx4_ib_tunnel_header hdr; + struct ib_mad mad; +} __packed; + +struct mlx4_rcv_tunnel_mad { + struct mlx4_rcv_tunnel_hdr hdr; + struct ib_grh grh; + struct ib_mad mad; +} __packed; + int mlx4_MAD_IFC(struct mlx4_ib_dev *dev, int ignore_mkey, int ignore_bkey, int port, struct ib_wc *in_wc, struct ib_grh *in_grh, void *in_mad, void *response_mad) @@ -516,3 +545,658 @@ void mlx4_ib_dispatch_event(struct mlx4_ib_dev *dev, u8 port_num, ib_dispatch_event(&event); } + +static void mlx4_ib_tunnel_comp_handler(struct ib_cq *cq, void *arg) +{ + unsigned long flags; + struct mlx4_ib_demux_pv_ctx *ctx = cq->cq_context; + struct mlx4_ib_dev *dev = to_mdev(ctx->ib_dev); + spin_lock_irqsave(&dev->sriov.going_down_lock, flags); + if (!dev->sriov.is_going_down && ctx->state == DEMUX_PV_STATE_ACTIVE) + queue_work(ctx->wq, &ctx->work); + spin_unlock_irqrestore(&dev->sriov.going_down_lock, flags); +} + +static int mlx4_ib_post_pv_qp_buf(struct mlx4_ib_demux_pv_ctx *ctx, + struct mlx4_ib_demux_pv_qp *tun_qp, + int index) +{ + struct ib_sge sg_list; + struct ib_recv_wr recv_wr, *bad_recv_wr; + int size; + + size = (tun_qp->qp->qp_type == IB_QPT_UD) ? + sizeof (struct mlx4_tunnel_mad) : sizeof (struct mlx4_mad_rcv_buf); + + sg_list.addr = tun_qp->ring[index].map; + sg_list.length = size; + sg_list.lkey = ctx->mr->lkey; + + recv_wr.next = NULL; + recv_wr.sg_list = &sg_list; + recv_wr.num_sge = 1; + recv_wr.wr_id = (u64) index | MLX4_TUN_WRID_RECV | + MLX4_TUN_SET_WRID_QPN(tun_qp->proxy_qpt); + ib_dma_sync_single_for_device(ctx->ib_dev, tun_qp->ring[index].map, + size, DMA_FROM_DEVICE); + return ib_post_recv(tun_qp->qp, &recv_wr, &bad_recv_wr); +} + +static int mlx4_ib_alloc_pv_bufs(struct mlx4_ib_demux_pv_ctx *ctx, + enum ib_qp_type qp_type, int is_tun) +{ + int i; + struct mlx4_ib_demux_pv_qp *tun_qp; + int rx_buf_size, tx_buf_size; + + if (qp_type > IB_QPT_GSI) + return -EINVAL; + + tun_qp = &ctx->qp[qp_type]; + + tun_qp->ring = kzalloc(sizeof (struct mlx4_ib_buf) * MLX4_NUM_TUNNEL_BUFS, + GFP_KERNEL); + if (!tun_qp->ring) + return -ENOMEM; + + tun_qp->tx_ring = kcalloc(MLX4_NUM_TUNNEL_BUFS, + sizeof (struct mlx4_ib_tun_tx_buf), + GFP_KERNEL); + if (!tun_qp->tx_ring) { + kfree(tun_qp->ring); + tun_qp->ring = NULL; + return -ENOMEM; + } + + if (is_tun) { + rx_buf_size = sizeof (struct mlx4_tunnel_mad); + tx_buf_size = sizeof (struct mlx4_rcv_tunnel_mad); + } else { + rx_buf_size = sizeof (struct mlx4_mad_rcv_buf); + tx_buf_size = sizeof (struct mlx4_mad_snd_buf); + } + + for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) { + tun_qp->ring[i].addr = kmalloc(rx_buf_size, GFP_KERNEL); + if (!tun_qp->ring[i].addr) + goto err; + tun_qp->ring[i].map = ib_dma_map_single(ctx->ib_dev, + tun_qp->ring[i].addr, + rx_buf_size, + DMA_FROM_DEVICE); + } + + for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) { + tun_qp->tx_ring[i].buf.addr = + kmalloc(tx_buf_size, GFP_KERNEL); + if (!tun_qp->tx_ring[i].buf.addr) + goto tx_err; + tun_qp->tx_ring[i].buf.map = + ib_dma_map_single(ctx->ib_dev, + tun_qp->tx_ring[i].buf.addr, + tx_buf_size, + DMA_TO_DEVICE); + tun_qp->tx_ring[i].ah = NULL; + } + spin_lock_init(&tun_qp->tx_lock); + tun_qp->tx_ix_head = 0; + tun_qp->tx_ix_tail = 0; + tun_qp->proxy_qpt = qp_type; + + return 0; + +tx_err: + while (i > 0) { + --i; + ib_dma_unmap_single(ctx->ib_dev, tun_qp->tx_ring[i].buf.map, + tx_buf_size, DMA_TO_DEVICE); + kfree(tun_qp->tx_ring[i].buf.addr); + } + kfree(tun_qp->tx_ring); + tun_qp->tx_ring = NULL; + i = MLX4_NUM_TUNNEL_BUFS; +err: + while (i > 0) { + --i; + ib_dma_unmap_single(ctx->ib_dev, tun_qp->ring[i].map, + rx_buf_size, DMA_FROM_DEVICE); + kfree(tun_qp->ring[i].addr); + } + kfree(tun_qp->ring); + tun_qp->ring = NULL; + return -ENOMEM; +} + +static void mlx4_ib_free_pv_qp_bufs(struct mlx4_ib_demux_pv_ctx *ctx, + enum ib_qp_type qp_type, int is_tun) +{ + int i; + struct mlx4_ib_demux_pv_qp *tun_qp; + int rx_buf_size, tx_buf_size; + + if (qp_type > IB_QPT_GSI) + return; + + tun_qp = &ctx->qp[qp_type]; + if (is_tun) { + rx_buf_size = sizeof (struct mlx4_tunnel_mad); + tx_buf_size = sizeof (struct mlx4_rcv_tunnel_mad); + } else { + rx_buf_size = sizeof (struct mlx4_mad_rcv_buf); + tx_buf_size = sizeof (struct mlx4_mad_snd_buf); + } + + + for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) { + ib_dma_unmap_single(ctx->ib_dev, tun_qp->ring[i].map, + rx_buf_size, DMA_FROM_DEVICE); + kfree(tun_qp->ring[i].addr); + } + + for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) { + ib_dma_unmap_single(ctx->ib_dev, tun_qp->tx_ring[i].buf.map, + tx_buf_size, DMA_TO_DEVICE); + kfree(tun_qp->tx_ring[i].buf.addr); + if (tun_qp->tx_ring[i].ah) + ib_destroy_ah(tun_qp->tx_ring[i].ah); + } + kfree(tun_qp->tx_ring); + kfree(tun_qp->ring); +} + +static void mlx4_ib_tunnel_comp_worker(struct work_struct *work) +{ + /* dummy until next patch in series */ +} + +static void pv_qp_event_handler(struct ib_event *event, void *qp_context) +{ + struct mlx4_ib_demux_pv_ctx *sqp = qp_context; + + /* It's worse than that! He's dead, Jim! */ + pr_err("Fatal error (%d) on a MAD QP on port %d\n", + event->event, sqp->port); +} + +static int create_pv_sqp(struct mlx4_ib_demux_pv_ctx *ctx, + enum ib_qp_type qp_type, int create_tun) +{ + int i, ret; + struct mlx4_ib_demux_pv_qp *tun_qp; + struct mlx4_ib_qp_tunnel_init_attr qp_init_attr; + struct ib_qp_attr attr; + int qp_attr_mask_INIT; + + if (qp_type > IB_QPT_GSI) + return -EINVAL; + + tun_qp = &ctx->qp[qp_type]; + + memset(&qp_init_attr, 0, sizeof qp_init_attr); + qp_init_attr.init_attr.send_cq = ctx->cq; + qp_init_attr.init_attr.recv_cq = ctx->cq; + qp_init_attr.init_attr.sq_sig_type = IB_SIGNAL_ALL_WR; + qp_init_attr.init_attr.cap.max_send_wr = MLX4_NUM_TUNNEL_BUFS; + qp_init_attr.init_attr.cap.max_recv_wr = MLX4_NUM_TUNNEL_BUFS; + qp_init_attr.init_attr.cap.max_send_sge = 1; + qp_init_attr.init_attr.cap.max_recv_sge = 1; + if (create_tun) { + qp_init_attr.init_attr.qp_type = IB_QPT_UD; + qp_init_attr.init_attr.create_flags = MLX4_IB_SRIOV_TUNNEL_QP; + qp_init_attr.port = ctx->port; + qp_init_attr.slave = ctx->slave; + qp_init_attr.proxy_qp_type = qp_type; + qp_attr_mask_INIT = IB_QP_STATE | IB_QP_PKEY_INDEX | + IB_QP_QKEY | IB_QP_PORT; + } else { + qp_init_attr.init_attr.qp_type = qp_type; + qp_init_attr.init_attr.create_flags = MLX4_IB_SRIOV_SQP; + qp_attr_mask_INIT = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_QKEY; + } + qp_init_attr.init_attr.port_num = ctx->port; + qp_init_attr.init_attr.qp_context = ctx; + qp_init_attr.init_attr.event_handler = pv_qp_event_handler; + tun_qp->qp = ib_create_qp(ctx->pd, &qp_init_attr.init_attr); + if (IS_ERR(tun_qp->qp)) { + ret = PTR_ERR(tun_qp->qp); + tun_qp->qp = NULL; + pr_err("Couldn't create %s QP (%d)\n", + create_tun ? "tunnel" : "special", ret); + return ret; + } + + memset(&attr, 0, sizeof attr); + attr.qp_state = IB_QPS_INIT; + attr.pkey_index = + to_mdev(ctx->ib_dev)->pkeys.virt2phys_pkey[ctx->slave][ctx->port - 1][0]; + attr.qkey = IB_QP1_QKEY; + attr.port_num = ctx->port; + ret = ib_modify_qp(tun_qp->qp, &attr, qp_attr_mask_INIT); + if (ret) { + pr_err("Couldn't change %s qp state to INIT (%d)\n", + create_tun ? "tunnel" : "special", ret); + goto err_qp; + } + attr.qp_state = IB_QPS_RTR; + ret = ib_modify_qp(tun_qp->qp, &attr, IB_QP_STATE); + if (ret) { + pr_err("Couldn't change %s qp state to RTR (%d)\n", + create_tun ? "tunnel" : "special", ret); + goto err_qp; + } + attr.qp_state = IB_QPS_RTS; + attr.sq_psn = 0; + ret = ib_modify_qp(tun_qp->qp, &attr, IB_QP_STATE | IB_QP_SQ_PSN); + if (ret) { + pr_err("Couldn't change %s qp state to RTS (%d)\n", + create_tun ? "tunnel" : "special", ret); + goto err_qp; + } + + for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) { + ret = mlx4_ib_post_pv_qp_buf(ctx, tun_qp, i); + if (ret) { + pr_err(" mlx4_ib_post_pv_buf error" + " (err = %d, i = %d)\n", ret, i); + goto err_qp; + } + } + return 0; + +err_qp: + ib_destroy_qp(tun_qp->qp); + tun_qp->qp = NULL; + return ret; +} + +/* + * IB MAD completion callback for real SQPs + */ +static void mlx4_ib_sqp_comp_worker(struct work_struct *work) +{ + /* dummy until next patch in series */ +} + +static int alloc_pv_object(struct mlx4_ib_dev *dev, int slave, int port, + struct mlx4_ib_demux_pv_ctx **ret_ctx) +{ + struct mlx4_ib_demux_pv_ctx *ctx; + + *ret_ctx = NULL; + ctx = kzalloc(sizeof (struct mlx4_ib_demux_pv_ctx), GFP_KERNEL); + if (!ctx) { + pr_err("failed allocating pv resource context " + "for port %d, slave %d\n", port, slave); + return -ENOMEM; + } + + ctx->ib_dev = &dev->ib_dev; + ctx->port = port; + ctx->slave = slave; + *ret_ctx = ctx; + return 0; +} + +static void free_pv_object(struct mlx4_ib_dev *dev, int slave, int port) +{ + if (dev->sriov.demux[port - 1].tun[slave]) { + kfree(dev->sriov.demux[port - 1].tun[slave]); + dev->sriov.demux[port - 1].tun[slave] = NULL; + } +} + +static int create_pv_resources(struct ib_device *ibdev, int slave, int port, + int create_tun, struct mlx4_ib_demux_pv_ctx *ctx) +{ + int ret, cq_size; + + ctx->state = DEMUX_PV_STATE_STARTING; + /* have QP0 only on port owner, and only if link layer is IB */ + if (ctx->slave == mlx4_master_func_num(to_mdev(ctx->ib_dev)->dev) && + rdma_port_get_link_layer(ibdev, ctx->port) == IB_LINK_LAYER_INFINIBAND) + ctx->has_smi = 1; + + if (ctx->has_smi) { + ret = mlx4_ib_alloc_pv_bufs(ctx, IB_QPT_SMI, create_tun); + if (ret) { + pr_err("Failed allocating qp0 tunnel bufs (%d)\n", ret); + goto err_out; + } + } + + ret = mlx4_ib_alloc_pv_bufs(ctx, IB_QPT_GSI, create_tun); + if (ret) { + pr_err("Failed allocating qp1 tunnel bufs (%d)\n", ret); + goto err_out_qp0; + } + + cq_size = 2 * MLX4_NUM_TUNNEL_BUFS; + if (ctx->has_smi) + cq_size *= 2; + + ctx->cq = ib_create_cq(ctx->ib_dev, mlx4_ib_tunnel_comp_handler, + NULL, ctx, cq_size, 0); + if (IS_ERR(ctx->cq)) { + ret = PTR_ERR(ctx->cq); + pr_err("Couldn't create tunnel CQ (%d)\n", ret); + goto err_buf; + } + + ctx->pd = ib_alloc_pd(ctx->ib_dev); + if (IS_ERR(ctx->pd)) { + ret = PTR_ERR(ctx->pd); + pr_err("Couldn't create tunnel PD (%d)\n", ret); + goto err_cq; + } + + ctx->mr = ib_get_dma_mr(ctx->pd, IB_ACCESS_LOCAL_WRITE); + if (IS_ERR(ctx->mr)) { + ret = PTR_ERR(ctx->mr); + pr_err("Couldn't get tunnel DMA MR (%d)\n", ret); + goto err_pd; + } + + if (ctx->has_smi) { + ret = create_pv_sqp(ctx, IB_QPT_SMI, create_tun); + if (ret) { + pr_err("Couldn't create %s QP0 (%d)\n", + create_tun ? "tunnel for" : "", ret); + goto err_mr; + } + } + + ret = create_pv_sqp(ctx, IB_QPT_GSI, create_tun); + if (ret) { + pr_err("Couldn't create %s QP1 (%d)\n", + create_tun ? "tunnel for" : "", ret); + goto err_qp0; + } + + if (create_tun) + INIT_WORK(&ctx->work, mlx4_ib_tunnel_comp_worker); + else + INIT_WORK(&ctx->work, mlx4_ib_sqp_comp_worker); + + ctx->wq = to_mdev(ibdev)->sriov.demux[port - 1].wq; + + ret = ib_req_notify_cq(ctx->cq, IB_CQ_NEXT_COMP); + if (ret) { + pr_err("Couldn't arm tunnel cq (%d)\n", ret); + goto err_wq; + } + ctx->state = DEMUX_PV_STATE_ACTIVE; + return 0; + +err_wq: + ctx->wq = NULL; + ib_destroy_qp(ctx->qp[1].qp); + ctx->qp[1].qp = NULL; + + +err_qp0: + if (ctx->has_smi) + ib_destroy_qp(ctx->qp[0].qp); + ctx->qp[0].qp = NULL; + +err_mr: + ib_dereg_mr(ctx->mr); + ctx->mr = NULL; + +err_pd: + ib_dealloc_pd(ctx->pd); + ctx->pd = NULL; + +err_cq: + ib_destroy_cq(ctx->cq); + ctx->cq = NULL; + +err_buf: + mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_GSI, create_tun); + +err_out_qp0: + if (ctx->has_smi) + mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_SMI, create_tun); +err_out: + ctx->state = DEMUX_PV_STATE_DOWN; + return ret; +} + +static void destroy_pv_resources(struct mlx4_ib_dev *dev, int slave, int port, + struct mlx4_ib_demux_pv_ctx *ctx, int flush) +{ + if (!ctx) + return; + if (ctx->state > DEMUX_PV_STATE_DOWN) { + ctx->state = DEMUX_PV_STATE_DOWNING; + if (flush) + flush_workqueue(ctx->wq); + if (ctx->has_smi) { + ib_destroy_qp(ctx->qp[0].qp); + ctx->qp[0].qp = NULL; + mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_SMI, 1); + } + ib_destroy_qp(ctx->qp[1].qp); + ctx->qp[1].qp = NULL; + mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_GSI, 1); + ib_dereg_mr(ctx->mr); + ctx->mr = NULL; + ib_dealloc_pd(ctx->pd); + ctx->pd = NULL; + ib_destroy_cq(ctx->cq); + ctx->cq = NULL; + ctx->state = DEMUX_PV_STATE_DOWN; + } +} + +static int mlx4_ib_tunnels_update(struct mlx4_ib_dev *dev, int slave, + int port, int do_init) +{ + int ret = 0; + + if (!do_init) { + /* for master, destroy real sqp resources */ + if (slave == mlx4_master_func_num(dev->dev)) + destroy_pv_resources(dev, slave, port, + dev->sriov.sqps[port - 1], 1); + /* destroy the tunnel qp resources */ + destroy_pv_resources(dev, slave, port, + dev->sriov.demux[port - 1].tun[slave], 1); + return 0; + } + + /* create the tunnel qp resources */ + ret = create_pv_resources(&dev->ib_dev, slave, port, 1, + dev->sriov.demux[port - 1].tun[slave]); + + /* for master, create the real sqp resources */ + if (!ret && slave == mlx4_master_func_num(dev->dev)) + ret = create_pv_resources(&dev->ib_dev, slave, port, 0, + dev->sriov.sqps[port - 1]); + return ret; +} + +void mlx4_ib_tunnels_update_work(struct work_struct *work) +{ + struct mlx4_ib_demux_work *dmxw; + + dmxw = container_of(work, struct mlx4_ib_demux_work, work); + mlx4_ib_tunnels_update(dmxw->dev, dmxw->slave, (int) dmxw->port, + dmxw->do_init); + kfree(dmxw); + return; +} + +static int mlx4_ib_alloc_demux_ctx(struct mlx4_ib_dev *dev, + struct mlx4_ib_demux_ctx *ctx, + int port) +{ + char name[12]; + int ret = 0; + int i; + + ctx->tun = kcalloc(dev->dev->caps.sqp_demux, + sizeof (struct mlx4_ib_demux_pv_ctx *), GFP_KERNEL); + if (!ctx->tun) + return -ENOMEM; + + ctx->dev = dev; + ctx->port = port; + ctx->ib_dev = &dev->ib_dev; + + for (i = 0; i < dev->dev->caps.sqp_demux; i++) { + ret = alloc_pv_object(dev, i, port, &ctx->tun[i]); + if (ret) { + ret = -ENOMEM; + goto err_wq; + } + } + + snprintf(name, sizeof name, "mlx4_ibt%d", port); + ctx->wq = create_singlethread_workqueue(name); + if (!ctx->wq) { + pr_err("Failed to create tunnelling WQ for port %d\n", port); + ret = -ENOMEM; + goto err_wq; + } + + snprintf(name, sizeof name, "mlx4_ibud%d", port); + ctx->ud_wq = create_singlethread_workqueue(name); + if (!ctx->ud_wq) { + pr_err("Failed to create up/down WQ for port %d\n", port); + ret = -ENOMEM; + goto err_udwq; + } + + return 0; + +err_udwq: + destroy_workqueue(ctx->wq); + ctx->wq = NULL; + +err_wq: + for (i = 0; i < dev->dev->caps.sqp_demux; i++) + free_pv_object(dev, i, port); + kfree(ctx->tun); + ctx->tun = NULL; + return ret; +} + +static void mlx4_ib_free_sqp_ctx(struct mlx4_ib_demux_pv_ctx *sqp_ctx) +{ + if (sqp_ctx->state > DEMUX_PV_STATE_DOWN) { + sqp_ctx->state = DEMUX_PV_STATE_DOWNING; + flush_workqueue(sqp_ctx->wq); + if (sqp_ctx->has_smi) { + ib_destroy_qp(sqp_ctx->qp[0].qp); + sqp_ctx->qp[0].qp = NULL; + mlx4_ib_free_pv_qp_bufs(sqp_ctx, IB_QPT_SMI, 0); + } + ib_destroy_qp(sqp_ctx->qp[1].qp); + sqp_ctx->qp[1].qp = NULL; + mlx4_ib_free_pv_qp_bufs(sqp_ctx, IB_QPT_GSI, 0); + ib_dereg_mr(sqp_ctx->mr); + sqp_ctx->mr = NULL; + ib_dealloc_pd(sqp_ctx->pd); + sqp_ctx->pd = NULL; + ib_destroy_cq(sqp_ctx->cq); + sqp_ctx->cq = NULL; + sqp_ctx->state = DEMUX_PV_STATE_DOWN; + } +} + +static void mlx4_ib_free_demux_ctx(struct mlx4_ib_demux_ctx *ctx) +{ + int i; + if (ctx) { + struct mlx4_ib_dev *dev = to_mdev(ctx->ib_dev); + for (i = 0; i < dev->dev->caps.sqp_demux; i++) { + if (!ctx->tun[i]) + continue; + if (ctx->tun[i]->state > DEMUX_PV_STATE_DOWN) + ctx->tun[i]->state = DEMUX_PV_STATE_DOWNING; + } + flush_workqueue(ctx->wq); + for (i = 0; i < dev->dev->caps.sqp_demux; i++) { + destroy_pv_resources(dev, i, ctx->port, ctx->tun[i], 0); + free_pv_object(dev, i, ctx->port); + } + kfree(ctx->tun); + destroy_workqueue(ctx->ud_wq); + destroy_workqueue(ctx->wq); + } +} + +static void mlx4_ib_master_tunnels(struct mlx4_ib_dev *dev, int do_init) +{ + int i; + + if (!mlx4_is_master(dev->dev)) + return; + /* initialize or tear down tunnel QPs for the master */ + for (i = 0; i < dev->dev->caps.num_ports; i++) + mlx4_ib_tunnels_update(dev, mlx4_master_func_num(dev->dev), i + 1, do_init); + return; +} + +int mlx4_ib_init_sriov(struct mlx4_ib_dev *dev) +{ + int i = 0; + int err; + + if (!mlx4_is_mfunc(dev->dev)) + return 0; + + dev->sriov.is_going_down = 0; + spin_lock_init(&dev->sriov.going_down_lock); + + mlx4_ib_warn(&dev->ib_dev, "multi-function enabled\n"); + + if (mlx4_is_slave(dev->dev)) { + mlx4_ib_warn(&dev->ib_dev, "operating in qp1 tunnel mode\n"); + return 0; + } + + mlx4_ib_warn(&dev->ib_dev, "initializing demux service for %d qp1 clients\n", + dev->dev->caps.sqp_demux); + for (i = 0; i < dev->num_ports; i++) { + err = alloc_pv_object(dev, mlx4_master_func_num(dev->dev), i + 1, + &dev->sriov.sqps[i]); + if (err) + goto demux_err; + err = mlx4_ib_alloc_demux_ctx(dev, &dev->sriov.demux[i], i + 1); + if (err) + goto demux_err; + } + mlx4_ib_master_tunnels(dev, 1); + return 0; + +demux_err: + while (i > 0) { + free_pv_object(dev, mlx4_master_func_num(dev->dev), i + 1); + mlx4_ib_free_demux_ctx(&dev->sriov.demux[i]); + --i; + } + + return err; +} + +void mlx4_ib_close_sriov(struct mlx4_ib_dev *dev) +{ + int i; + unsigned long flags; + + if (!mlx4_is_mfunc(dev->dev)) + return; + + spin_lock_irqsave(&dev->sriov.going_down_lock, flags); + dev->sriov.is_going_down = 1; + spin_unlock_irqrestore(&dev->sriov.going_down_lock, flags); + if (mlx4_is_master(dev->dev)) + for (i = 0; i < dev->num_ports; i++) { + flush_workqueue(dev->sriov.demux[i].ud_wq); + mlx4_ib_free_sqp_ctx(dev->sriov.sqps[i]); + kfree(dev->sriov.sqps[i]); + dev->sriov.sqps[i] = NULL; + mlx4_ib_free_demux_ctx(&dev->sriov.demux[i]); + } +} |