From 6b1f9d647e848060d34c3db408413989f1e460ba Mon Sep 17 00:00:00 2001 From: Joachim Fenkes Date: Mon, 1 Dec 2008 10:05:44 -0800 Subject: IB/ehca: Change misleading error message on memory hotplug The error message printed when the eHCA driver prevents memory hotplug is misleading -- the user might think that hot-removing the lhca, hotplugging memory, then hot-adding the lhca again will work, but it actually doesn't. Signed-off-by: Joachim Fenkes Signed-off-by: Roland Dreier --- drivers/infiniband/hw/ehca/ehca_main.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'drivers/infiniband') diff --git a/drivers/infiniband/hw/ehca/ehca_main.c b/drivers/infiniband/hw/ehca/ehca_main.c index bb02a86aa52..bec7e024935 100644 --- a/drivers/infiniband/hw/ehca/ehca_main.c +++ b/drivers/infiniband/hw/ehca/ehca_main.c @@ -994,8 +994,7 @@ static int ehca_mem_notifier(struct notifier_block *nb, if (printk_timed_ratelimit(&ehca_dmem_warn_time, 30 * 1000)) ehca_gen_err("DMEM operations are not allowed" - "as long as an ehca adapter is" - "attached to the LPAR"); + "in conjunction with eHCA"); return NOTIFY_BAD; } } -- cgit v1.2.3 From 7ec4f4634a4326c1f8fd172c80c8f59c9b3e90a4 Mon Sep 17 00:00:00 2001 From: Stefan Roscher Date: Mon, 1 Dec 2008 10:05:50 -0800 Subject: IB/ehca: Fix problem with generated flush work completions This fix enables ehca device driver to generate flush work completions even if the application doesn't request completions for all work requests. The current implementation of ehca will generate flush work completions for the wrong work requests if an application uses non signaled work completions. Signed-off-by: Stefan Roscher Signed-off-by: Roland Dreier --- drivers/infiniband/hw/ehca/ehca_classes.h | 4 ++- drivers/infiniband/hw/ehca/ehca_qp.c | 26 ++++++++++++---- drivers/infiniband/hw/ehca/ehca_reqs.c | 51 ++++++++++++++++++------------- 3 files changed, 53 insertions(+), 28 deletions(-) (limited to 'drivers/infiniband') diff --git a/drivers/infiniband/hw/ehca/ehca_classes.h b/drivers/infiniband/hw/ehca/ehca_classes.h index 4df887af66a..7fc35cf0cdd 100644 --- a/drivers/infiniband/hw/ehca/ehca_classes.h +++ b/drivers/infiniband/hw/ehca/ehca_classes.h @@ -163,7 +163,8 @@ struct ehca_mod_qp_parm { /* struct for tracking if cqes have been reported to the application */ struct ehca_qmap_entry { u16 app_wr_id; - u16 reported; + u8 reported; + u8 cqe_req; }; struct ehca_queue_map { @@ -171,6 +172,7 @@ struct ehca_queue_map { unsigned int entries; unsigned int tail; unsigned int left_to_poll; + unsigned int next_wqe_idx; /* Idx to first wqe to be flushed */ }; struct ehca_qp { diff --git a/drivers/infiniband/hw/ehca/ehca_qp.c b/drivers/infiniband/hw/ehca/ehca_qp.c index 9e05ee2db39..cadbf0cdd91 100644 --- a/drivers/infiniband/hw/ehca/ehca_qp.c +++ b/drivers/infiniband/hw/ehca/ehca_qp.c @@ -435,9 +435,13 @@ static void reset_queue_map(struct ehca_queue_map *qmap) { int i; - qmap->tail = 0; - for (i = 0; i < qmap->entries; i++) + qmap->tail = qmap->entries - 1; + qmap->left_to_poll = 0; + qmap->next_wqe_idx = 0; + for (i = 0; i < qmap->entries; i++) { qmap->map[i].reported = 1; + qmap->map[i].cqe_req = 0; + } } /* @@ -1121,6 +1125,7 @@ static int calc_left_cqes(u64 wqe_p, struct ipz_queue *ipz_queue, void *wqe_v; u64 q_ofs; u32 wqe_idx; + unsigned int tail_idx; /* convert real to abs address */ wqe_p = wqe_p & (~(1UL << 63)); @@ -1133,12 +1138,17 @@ static int calc_left_cqes(u64 wqe_p, struct ipz_queue *ipz_queue, return -EFAULT; } + tail_idx = (qmap->tail + 1) % qmap->entries; wqe_idx = q_ofs / ipz_queue->qe_size; - if (wqe_idx < qmap->tail) - qmap->left_to_poll = (qmap->entries - qmap->tail) + wqe_idx; - else - qmap->left_to_poll = wqe_idx - qmap->tail; + /* check all processed wqes, whether a cqe is requested or not */ + while (tail_idx != wqe_idx) { + if (qmap->map[tail_idx].cqe_req) + qmap->left_to_poll++; + tail_idx = (tail_idx + 1) % qmap->entries; + } + /* save index in queue, where we have to start flushing */ + qmap->next_wqe_idx = wqe_idx; return 0; } @@ -1185,10 +1195,14 @@ static int check_for_left_cqes(struct ehca_qp *my_qp, struct ehca_shca *shca) } else { spin_lock_irqsave(&my_qp->send_cq->spinlock, flags); my_qp->sq_map.left_to_poll = 0; + my_qp->sq_map.next_wqe_idx = (my_qp->sq_map.tail + 1) % + my_qp->sq_map.entries; spin_unlock_irqrestore(&my_qp->send_cq->spinlock, flags); spin_lock_irqsave(&my_qp->recv_cq->spinlock, flags); my_qp->rq_map.left_to_poll = 0; + my_qp->rq_map.next_wqe_idx = (my_qp->rq_map.tail + 1) % + my_qp->rq_map.entries; spin_unlock_irqrestore(&my_qp->recv_cq->spinlock, flags); } diff --git a/drivers/infiniband/hw/ehca/ehca_reqs.c b/drivers/infiniband/hw/ehca/ehca_reqs.c index 64928079eaf..00a648f4316 100644 --- a/drivers/infiniband/hw/ehca/ehca_reqs.c +++ b/drivers/infiniband/hw/ehca/ehca_reqs.c @@ -179,6 +179,7 @@ static inline int ehca_write_swqe(struct ehca_qp *qp, qmap_entry->app_wr_id = get_app_wr_id(send_wr->wr_id); qmap_entry->reported = 0; + qmap_entry->cqe_req = 0; switch (send_wr->opcode) { case IB_WR_SEND: @@ -203,8 +204,10 @@ static inline int ehca_write_swqe(struct ehca_qp *qp, if ((send_wr->send_flags & IB_SEND_SIGNALED || qp->init_attr.sq_sig_type == IB_SIGNAL_ALL_WR) - && !hidden) + && !hidden) { wqe_p->wr_flag |= WQE_WRFLAG_REQ_SIGNAL_COM; + qmap_entry->cqe_req = 1; + } if (send_wr->opcode == IB_WR_SEND_WITH_IMM || send_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) { @@ -569,6 +572,7 @@ static int internal_post_recv(struct ehca_qp *my_qp, qmap_entry = &my_qp->rq_map.map[rq_map_idx]; qmap_entry->app_wr_id = get_app_wr_id(cur_recv_wr->wr_id); qmap_entry->reported = 0; + qmap_entry->cqe_req = 1; wqe_cnt++; } /* eof for cur_recv_wr */ @@ -706,27 +710,34 @@ repoll: goto repoll; wc->qp = &my_qp->ib_qp; + qmap_tail_idx = get_app_wr_id(cqe->work_request_id); + if (!(cqe->w_completion_flags & WC_SEND_RECEIVE_BIT)) + /* We got a send completion. */ + qmap = &my_qp->sq_map; + else + /* We got a receive completion. */ + qmap = &my_qp->rq_map; + + /* advance the tail pointer */ + qmap->tail = qmap_tail_idx; + if (is_error) { /* * set left_to_poll to 0 because in error state, we will not * get any additional CQEs */ - ehca_add_to_err_list(my_qp, 1); + my_qp->sq_map.next_wqe_idx = (my_qp->sq_map.tail + 1) % + my_qp->sq_map.entries; my_qp->sq_map.left_to_poll = 0; + ehca_add_to_err_list(my_qp, 1); + my_qp->rq_map.next_wqe_idx = (my_qp->rq_map.tail + 1) % + my_qp->rq_map.entries; + my_qp->rq_map.left_to_poll = 0; if (HAS_RQ(my_qp)) ehca_add_to_err_list(my_qp, 0); - my_qp->rq_map.left_to_poll = 0; } - qmap_tail_idx = get_app_wr_id(cqe->work_request_id); - if (!(cqe->w_completion_flags & WC_SEND_RECEIVE_BIT)) - /* We got a send completion. */ - qmap = &my_qp->sq_map; - else - /* We got a receive completion. */ - qmap = &my_qp->rq_map; - qmap_entry = &qmap->map[qmap_tail_idx]; if (qmap_entry->reported) { ehca_warn(cq->device, "Double cqe on qp_num=%#x", @@ -738,10 +749,6 @@ repoll: wc->wr_id = replace_wr_id(cqe->work_request_id, qmap_entry->app_wr_id); qmap_entry->reported = 1; - /* this is a proper completion, we need to advance the tail pointer */ - if (++qmap->tail == qmap->entries) - qmap->tail = 0; - /* if left_to_poll is decremented to 0, add the QP to the error list */ if (qmap->left_to_poll > 0) { qmap->left_to_poll--; @@ -805,13 +812,14 @@ static int generate_flush_cqes(struct ehca_qp *my_qp, struct ib_cq *cq, else qmap = &my_qp->rq_map; - qmap_entry = &qmap->map[qmap->tail]; + qmap_entry = &qmap->map[qmap->next_wqe_idx]; while ((nr < num_entries) && (qmap_entry->reported == 0)) { /* generate flush CQE */ + memset(wc, 0, sizeof(*wc)); - offset = qmap->tail * ipz_queue->qe_size; + offset = qmap->next_wqe_idx * ipz_queue->qe_size; wqe = (struct ehca_wqe *)ipz_qeit_calc(ipz_queue, offset); if (!wqe) { ehca_err(cq->device, "Invalid wqe offset=%#lx on " @@ -850,11 +858,12 @@ static int generate_flush_cqes(struct ehca_qp *my_qp, struct ib_cq *cq, wc->qp = &my_qp->ib_qp; - /* mark as reported and advance tail pointer */ + /* mark as reported and advance next_wqe pointer */ qmap_entry->reported = 1; - if (++qmap->tail == qmap->entries) - qmap->tail = 0; - qmap_entry = &qmap->map[qmap->tail]; + qmap->next_wqe_idx++; + if (qmap->next_wqe_idx == qmap->entries) + qmap->next_wqe_idx = 0; + qmap_entry = &qmap->map[qmap->next_wqe_idx]; wc++; nr++; } -- cgit v1.2.3 From 42ab01c31526ac1d06d193f81a498bf3cf2acfe4 Mon Sep 17 00:00:00 2001 From: Jack Morgenstein Date: Mon, 1 Dec 2008 10:09:37 -0800 Subject: IB/mlx4: Fix MTT leakage in resize CQ When resizing a CQ, MTTs associated with the old CQE buffer were not freed. As a result, if any app used resize CQ repeatedly, all MTTs were eventually exhausted, which led to all memory registration operations failing until the driver is reloaded. Once the RESIZE_CQ command returns successfully from FW, FW no longer accesses the old CQ buffer, so it is safe to deallocate the MTT entries used by the old CQ buffer. Finally, if the RESIZE_CQ command fails, the MTTs allocated for the new CQEs buffer also need to be de-allocated. This fixes . Signed-off-by: Jack Morgenstein Signed-off-by: Roland Dreier --- drivers/infiniband/hw/mlx4/cq.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/infiniband') diff --git a/drivers/infiniband/hw/mlx4/cq.c b/drivers/infiniband/hw/mlx4/cq.c index d0866a3636e..18308494a19 100644 --- a/drivers/infiniband/hw/mlx4/cq.c +++ b/drivers/infiniband/hw/mlx4/cq.c @@ -343,6 +343,7 @@ int mlx4_ib_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *udata) { struct mlx4_ib_dev *dev = to_mdev(ibcq->device); struct mlx4_ib_cq *cq = to_mcq(ibcq); + struct mlx4_mtt mtt; int outst_cqe; int err; @@ -376,10 +377,13 @@ int mlx4_ib_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *udata) goto out; } + mtt = cq->buf.mtt; + err = mlx4_cq_resize(dev->dev, &cq->mcq, entries, &cq->resize_buf->buf.mtt); if (err) goto err_buf; + mlx4_mtt_cleanup(dev->dev, &mtt); if (ibcq->uobject) { cq->buf = cq->resize_buf->buf; cq->ibcq.cqe = cq->resize_buf->cqe; @@ -406,6 +410,7 @@ int mlx4_ib_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *udata) goto out; err_buf: + mlx4_mtt_cleanup(dev->dev, &cq->resize_buf->buf.mtt); if (!ibcq->uobject) mlx4_ib_free_cq_buf(dev, &cq->resize_buf->buf, cq->resize_buf->cqe); -- cgit v1.2.3