From d59659340c61e777208524f77c268fe6edc6fe37 Mon Sep 17 00:00:00 2001 From: Mustafa Ismail Date: Wed, 30 Nov 2016 14:59:26 -0600 Subject: [PATCH] i40iw: Add missing cleanup on device close On i40iw device close, disconnect all connected QPs by moving them to error state; and block further QPs, PDs and CQs from being created. Additionally, make sure all resources have been freed before deallocating the ibdev as part of the device close. Signed-off-by: Mustafa Ismail Signed-off-by: Shiraz Saleem Signed-off-by: Doug Ledford --- drivers/infiniband/hw/i40iw/i40iw.h | 5 ++++ drivers/infiniband/hw/i40iw/i40iw_cm.c | 31 +++++++++++++++++++++++ drivers/infiniband/hw/i40iw/i40iw_cm.h | 2 ++ drivers/infiniband/hw/i40iw/i40iw_d.h | 2 ++ drivers/infiniband/hw/i40iw/i40iw_main.c | 4 +++ drivers/infiniband/hw/i40iw/i40iw_utils.c | 21 +++++++++++++++ drivers/infiniband/hw/i40iw/i40iw_verbs.c | 25 ++++++++++++++++++ 7 files changed, 90 insertions(+) diff --git a/drivers/infiniband/hw/i40iw/i40iw.h b/drivers/infiniband/hw/i40iw/i40iw.h index dac9a6bcc631..c795c6160261 100644 --- a/drivers/infiniband/hw/i40iw/i40iw.h +++ b/drivers/infiniband/hw/i40iw/i40iw.h @@ -303,10 +303,13 @@ struct i40iw_device { u32 mr_stagmask; u32 mpa_version; bool dcb; + bool closing; u32 used_pds; u32 used_cqs; u32 used_mrs; u32 used_qps; + wait_queue_head_t close_wq; + atomic64_t use_count; }; struct i40iw_ib_device { @@ -521,6 +524,8 @@ int i40iw_modify_qp(struct ib_qp *, struct ib_qp_attr *, int, struct ib_udata *) void i40iw_rem_pdusecount(struct i40iw_pd *iwpd, struct i40iw_device *iwdev); void i40iw_add_pdusecount(struct i40iw_pd *iwpd); +void i40iw_rem_devusecount(struct i40iw_device *iwdev); +void i40iw_add_devusecount(struct i40iw_device *iwdev); void i40iw_hw_modify_qp(struct i40iw_device *iwdev, struct i40iw_qp *iwqp, struct i40iw_modify_qp_info *info, bool wait); diff --git a/drivers/infiniband/hw/i40iw/i40iw_cm.c b/drivers/infiniband/hw/i40iw/i40iw_cm.c index b60e34653ec1..11ef0b09c843 100644 --- a/drivers/infiniband/hw/i40iw/i40iw_cm.c +++ b/drivers/infiniband/hw/i40iw/i40iw_cm.c @@ -4128,3 +4128,34 @@ static void i40iw_cm_post_event(struct i40iw_cm_event *event) queue_work(event->cm_node->cm_core->event_wq, &event->event_work); } + +/** + * i40iw_cm_disconnect_all - disconnect all connected qp's + * @iwdev: device pointer + */ +void i40iw_cm_disconnect_all(struct i40iw_device *iwdev) +{ + struct i40iw_cm_core *cm_core = &iwdev->cm_core; + struct list_head *list_core_temp; + struct list_head *list_node; + struct i40iw_cm_node *cm_node; + unsigned long flags; + struct list_head connected_list; + struct ib_qp_attr attr; + + INIT_LIST_HEAD(&connected_list); + spin_lock_irqsave(&cm_core->ht_lock, flags); + list_for_each_safe(list_node, list_core_temp, &cm_core->connected_nodes) { + cm_node = container_of(list_node, struct i40iw_cm_node, list); + atomic_inc(&cm_node->ref_count); + list_add(&cm_node->connected_entry, &connected_list); + } + spin_unlock_irqrestore(&cm_core->ht_lock, flags); + + list_for_each_safe(list_node, list_core_temp, &connected_list) { + cm_node = container_of(list_node, struct i40iw_cm_node, connected_entry); + attr.qp_state = IB_QPS_ERR; + i40iw_modify_qp(&cm_node->iwqp->ibqp, &attr, IB_QP_STATE, NULL); + i40iw_rem_ref_cm_node(cm_node); + } +} diff --git a/drivers/infiniband/hw/i40iw/i40iw_cm.h b/drivers/infiniband/hw/i40iw/i40iw_cm.h index 24615c24cb04..0381b7f5e20d 100644 --- a/drivers/infiniband/hw/i40iw/i40iw_cm.h +++ b/drivers/infiniband/hw/i40iw/i40iw_cm.h @@ -339,6 +339,7 @@ struct i40iw_cm_node { int accept_pend; struct list_head timer_entry; struct list_head reset_entry; + struct list_head connected_entry; atomic_t passive_state; bool qhash_set; u8 user_pri; @@ -443,4 +444,5 @@ int i40iw_arp_table(struct i40iw_device *iwdev, u8 *mac_addr, u32 action); +void i40iw_cm_disconnect_all(struct i40iw_device *iwdev); #endif /* I40IW_CM_H */ diff --git a/drivers/infiniband/hw/i40iw/i40iw_d.h b/drivers/infiniband/hw/i40iw/i40iw_d.h index e184c0e99cb1..1bd4badb26d3 100644 --- a/drivers/infiniband/hw/i40iw/i40iw_d.h +++ b/drivers/infiniband/hw/i40iw/i40iw_d.h @@ -35,6 +35,8 @@ #ifndef I40IW_D_H #define I40IW_D_H +#define I40IW_FIRST_USER_QP_ID 2 + #define I40IW_DB_ADDR_OFFSET (4 * 1024 * 1024 - 64 * 1024) #define I40IW_VF_DB_ADDR_OFFSET (64 * 1024) diff --git a/drivers/infiniband/hw/i40iw/i40iw_main.c b/drivers/infiniband/hw/i40iw/i40iw_main.c index 9d3b9ee20ba7..d86bb6e98f07 100644 --- a/drivers/infiniband/hw/i40iw/i40iw_main.c +++ b/drivers/infiniband/hw/i40iw/i40iw_main.c @@ -1546,6 +1546,7 @@ static enum i40iw_status_code i40iw_setup_init_state(struct i40iw_handler *hdl, init_waitqueue_head(&iwdev->vchnl_waitq); init_waitqueue_head(&dev->vf_reqs); + init_waitqueue_head(&iwdev->close_wq); status = i40iw_initialize_dev(iwdev, ldev); exit: @@ -1748,6 +1749,9 @@ static void i40iw_close(struct i40e_info *ldev, struct i40e_client *client, bool return; iwdev = &hdl->device; + iwdev->closing = true; + + i40iw_cm_disconnect_all(iwdev); destroy_workqueue(iwdev->virtchnl_wq); i40iw_deinit_device(iwdev, reset); } diff --git a/drivers/infiniband/hw/i40iw/i40iw_utils.c b/drivers/infiniband/hw/i40iw/i40iw_utils.c index 4e880e8689eb..58151280828d 100644 --- a/drivers/infiniband/hw/i40iw/i40iw_utils.c +++ b/drivers/infiniband/hw/i40iw/i40iw_utils.c @@ -392,6 +392,7 @@ static void i40iw_free_qp(struct i40iw_cqp_request *cqp_request, u32 num) i40iw_rem_pdusecount(iwqp->iwpd, iwdev); i40iw_free_qp_resources(iwdev, iwqp, qp_num); + i40iw_rem_devusecount(iwdev); } /** @@ -458,6 +459,26 @@ enum i40iw_status_code i40iw_handle_cqp_op(struct i40iw_device *iwdev, return status; } +/** + * i40iw_add_devusecount - add dev refcount + * @iwdev: dev for refcount + */ +void i40iw_add_devusecount(struct i40iw_device *iwdev) +{ + atomic64_inc(&iwdev->use_count); +} + +/** + * i40iw_rem_devusecount - decrement refcount for dev + * @iwdev: device + */ +void i40iw_rem_devusecount(struct i40iw_device *iwdev) +{ + if (!atomic64_dec_and_test(&iwdev->use_count)) + return; + wake_up(&iwdev->close_wq); +} + /** * i40iw_add_pdusecount - add pd refcount * @iwpd: pd for refcount diff --git a/drivers/infiniband/hw/i40iw/i40iw_verbs.c b/drivers/infiniband/hw/i40iw/i40iw_verbs.c index 1c2f0a19bd63..bc24086989e3 100644 --- a/drivers/infiniband/hw/i40iw/i40iw_verbs.c +++ b/drivers/infiniband/hw/i40iw/i40iw_verbs.c @@ -336,6 +336,9 @@ static struct ib_pd *i40iw_alloc_pd(struct ib_device *ibdev, u32 pd_id = 0; int err; + if (iwdev->closing) + return ERR_PTR(-ENODEV); + err = i40iw_alloc_resource(iwdev, iwdev->allocated_pds, iwdev->max_pd, &pd_id, &iwdev->next_pd); if (err) { @@ -601,6 +604,9 @@ static struct ib_qp *i40iw_create_qp(struct ib_pd *ibpd, struct i40iwarp_offload_info *iwarp_info; unsigned long flags; + if (iwdev->closing) + return ERR_PTR(-ENODEV); + if (init_attr->create_flags) return ERR_PTR(-EINVAL); if (init_attr->cap.max_inline_data > I40IW_MAX_INLINE_DATA_SIZE) @@ -776,6 +782,7 @@ static struct ib_qp *i40iw_create_qp(struct ib_pd *ibpd, iwqp->sig_all = (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR) ? 1 : 0; iwdev->qp_table[qp_num] = iwqp; i40iw_add_pdusecount(iwqp->iwpd); + i40iw_add_devusecount(iwdev); if (ibpd->uobject && udata) { memset(&uresp, 0, sizeof(uresp)); uresp.actual_sq_size = sq_size; @@ -887,6 +894,11 @@ int i40iw_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, spin_lock_irqsave(&iwqp->lock, flags); if (attr_mask & IB_QP_STATE) { + if (iwdev->closing && attr->qp_state != IB_QPS_ERR) { + err = -EINVAL; + goto exit; + } + switch (attr->qp_state) { case IB_QPS_INIT: case IB_QPS_RTR: @@ -1086,6 +1098,7 @@ static int i40iw_destroy_cq(struct ib_cq *ib_cq) cq_wq_destroy(iwdev, cq); cq_free_resources(iwdev, iwcq); kfree(iwcq); + i40iw_rem_devusecount(iwdev); return 0; } @@ -1116,6 +1129,9 @@ static struct ib_cq *i40iw_create_cq(struct ib_device *ibdev, int err_code; int entries = attr->cqe; + if (iwdev->closing) + return ERR_PTR(-ENODEV); + if (entries > iwdev->max_cqe) return ERR_PTR(-EINVAL); @@ -1233,6 +1249,7 @@ static struct ib_cq *i40iw_create_cq(struct ib_device *ibdev, } } + i40iw_add_devusecount(iwdev); return (struct ib_cq *)iwcq; cq_destroy: @@ -1270,6 +1287,7 @@ static void i40iw_free_stag(struct i40iw_device *iwdev, u32 stag) stag_idx = (stag & iwdev->mr_stagmask) >> I40IW_CQPSQ_STAG_IDX_SHIFT; i40iw_free_resource(iwdev, iwdev->allocated_mrs, stag_idx); + i40iw_rem_devusecount(iwdev); } /** @@ -1300,6 +1318,7 @@ static u32 i40iw_create_stag(struct i40iw_device *iwdev) stag = stag_index << I40IW_CQPSQ_STAG_IDX_SHIFT; stag |= driver_key; stag += (u32)consumer_key; + i40iw_add_devusecount(iwdev); } return stag; } @@ -1809,6 +1828,9 @@ static struct ib_mr *i40iw_reg_user_mr(struct ib_pd *pd, int ret; int pg_shift; + if (iwdev->closing) + return ERR_PTR(-ENODEV); + if (length > I40IW_MAX_MR_SIZE) return ERR_PTR(-EINVAL); region = ib_umem_get(pd->uobject->context, start, length, acc, 0); @@ -2842,6 +2864,9 @@ void i40iw_destroy_rdma_device(struct i40iw_ib_device *iwibdev) i40iw_unregister_rdma_device(iwibdev); kfree(iwibdev->ibdev.iwcm); iwibdev->ibdev.iwcm = NULL; + wait_event_timeout(iwibdev->iwdev->close_wq, + !atomic64_read(&iwibdev->iwdev->use_count), + I40IW_EVENT_TIMEOUT); ib_dealloc_device(&iwibdev->ibdev); } -- 2.39.5