From f69c3331624438321877083e27f5aa09eab3b863 Mon Sep 17 00:00:00 2001 From: "Ismail, Mustafa" Date: Mon, 18 Apr 2016 10:33:03 -0500 Subject: [PATCH] RDMA/i40iw: Add virtual channel message queue Queue users of virtual channel on a waitqueue until the channel is clear instead of failing the call when the channel is occupied. Signed-off-by: Mustafa Ismail Signed-off-by: Faisal Latif Signed-off-by: Doug Ledford --- drivers/infiniband/hw/i40iw/i40iw_main.c | 47 ++++++++-- drivers/infiniband/hw/i40iw/i40iw_osdep.h | 1 + drivers/infiniband/hw/i40iw/i40iw_type.h | 3 +- drivers/infiniband/hw/i40iw/i40iw_utils.c | 11 ++- drivers/infiniband/hw/i40iw/i40iw_verbs.c | 8 +- drivers/infiniband/hw/i40iw/i40iw_virtchnl.c | 96 +++++++++++--------- 6 files changed, 103 insertions(+), 63 deletions(-) diff --git a/drivers/infiniband/hw/i40iw/i40iw_main.c b/drivers/infiniband/hw/i40iw/i40iw_main.c index f49aea1cedff..9cf5b3e743ee 100644 --- a/drivers/infiniband/hw/i40iw/i40iw_main.c +++ b/drivers/infiniband/hw/i40iw/i40iw_main.c @@ -1528,7 +1528,10 @@ static enum i40iw_status_code i40iw_setup_init_state(struct i40iw_handler *hdl, goto exit; iwdev->obj_next = iwdev->obj_mem; iwdev->push_mode = push_mode; + init_waitqueue_head(&iwdev->vchnl_waitq); + init_waitqueue_head(&dev->vf_reqs); + status = i40iw_initialize_dev(iwdev, ldev); exit: if (status) { @@ -1707,7 +1710,6 @@ static void i40iw_vf_reset(struct i40e_info *ldev, struct i40e_client *client, u for (i = 0; i < I40IW_MAX_PE_ENABLED_VF_COUNT; i++) { if (!dev->vf_dev[i] || (dev->vf_dev[i]->vf_id != vf_id)) continue; - /* free all resources allocated on behalf of vf */ tmp_vfdev = dev->vf_dev[i]; spin_lock_irqsave(&dev->dev_pestat.stats_lock, flags); @@ -1816,8 +1818,6 @@ static int i40iw_virtchnl_receive(struct i40e_info *ldev, dev = &hdl->device.sc_dev; iwdev = dev->back_dev; - i40iw_debug(dev, I40IW_DEBUG_VIRT, "msg %p, message length %u\n", msg, len); - if (dev->vchnl_if.vchnl_recv) { ret_code = dev->vchnl_if.vchnl_recv(dev, vf_id, msg, len); if (!dev->is_pf) { @@ -1828,6 +1828,39 @@ static int i40iw_virtchnl_receive(struct i40e_info *ldev, return ret_code; } +/** + * i40iw_vf_clear_to_send - wait to send virtual channel message + * @dev: iwarp device * + * Wait for until virtual channel is clear + * before sending the next message + * + * Returns false if error + * Returns true if clear to send + */ +bool i40iw_vf_clear_to_send(struct i40iw_sc_dev *dev) +{ + struct i40iw_device *iwdev; + wait_queue_t wait; + + iwdev = dev->back_dev; + + if (!wq_has_sleeper(&dev->vf_reqs) && + (atomic_read(&iwdev->vchnl_msgs) == 0)) + return true; /* virtual channel is clear */ + + init_wait(&wait); + add_wait_queue_exclusive(&dev->vf_reqs, &wait); + + if (!wait_event_timeout(dev->vf_reqs, + (atomic_read(&iwdev->vchnl_msgs) == 0), + I40IW_VCHNL_EVENT_TIMEOUT)) + dev->vchnl_up = false; + + remove_wait_queue(&dev->vf_reqs, &wait); + + return dev->vchnl_up; +} + /** * i40iw_virtchnl_send - send a message through the virtual channel * @dev: iwarp device @@ -1845,18 +1878,16 @@ static enum i40iw_status_code i40iw_virtchnl_send(struct i40iw_sc_dev *dev, { struct i40iw_device *iwdev; struct i40e_info *ldev; - enum i40iw_status_code ret_code = I40IW_ERR_BAD_PTR; if (!dev || !dev->back_dev) - return ret_code; + return I40IW_ERR_BAD_PTR; iwdev = dev->back_dev; ldev = iwdev->ldev; if (ldev && ldev->ops && ldev->ops->virtchnl_send) - ret_code = ldev->ops->virtchnl_send(ldev, &i40iw_client, vf_id, msg, len); - - return ret_code; + return ldev->ops->virtchnl_send(ldev, &i40iw_client, vf_id, msg, len); + return I40IW_ERR_BAD_PTR; } /* client interface functions */ diff --git a/drivers/infiniband/hw/i40iw/i40iw_osdep.h b/drivers/infiniband/hw/i40iw/i40iw_osdep.h index 7e20493510e8..80f422bf3967 100644 --- a/drivers/infiniband/hw/i40iw/i40iw_osdep.h +++ b/drivers/infiniband/hw/i40iw/i40iw_osdep.h @@ -172,6 +172,7 @@ struct i40iw_hw; u8 __iomem *i40iw_get_hw_addr(void *dev); void i40iw_ieq_mpa_crc_ae(struct i40iw_sc_dev *dev, struct i40iw_sc_qp *qp); enum i40iw_status_code i40iw_vf_wait_vchnl_resp(struct i40iw_sc_dev *dev); +bool i40iw_vf_clear_to_send(struct i40iw_sc_dev *dev); enum i40iw_status_code i40iw_ieq_check_mpacrc(struct shash_desc *desc, void *addr, u32 length, u32 value); struct i40iw_sc_qp *i40iw_ieq_get_qp(struct i40iw_sc_dev *dev, struct i40iw_puda_buf *buf); diff --git a/drivers/infiniband/hw/i40iw/i40iw_type.h b/drivers/infiniband/hw/i40iw/i40iw_type.h index edb3a8c8267a..5b6a49143a92 100644 --- a/drivers/infiniband/hw/i40iw/i40iw_type.h +++ b/drivers/infiniband/hw/i40iw/i40iw_type.h @@ -483,12 +483,13 @@ struct i40iw_sc_dev { struct i40iw_hmc_fpm_misc hmc_fpm_misc; u16 qs_handle; - u32 debug_mask; + u32 debug_mask; u16 exception_lan_queue; u8 hmc_fn_id; bool is_pf; bool vchnl_up; u8 vf_id; + wait_queue_head_t vf_reqs; u64 cqp_cmd_stats[OP_SIZE_CQP_STAT_ARRAY]; struct i40iw_vchnl_vf_msg_buffer vchnl_vf_msg_buf; u8 hw_rev; diff --git a/drivers/infiniband/hw/i40iw/i40iw_utils.c b/drivers/infiniband/hw/i40iw/i40iw_utils.c index 7ed998c573a4..cddd63942031 100644 --- a/drivers/infiniband/hw/i40iw/i40iw_utils.c +++ b/drivers/infiniband/hw/i40iw/i40iw_utils.c @@ -990,21 +990,24 @@ enum i40iw_status_code i40iw_cqp_commit_fpm_values_cmd(struct i40iw_sc_dev *dev, enum i40iw_status_code i40iw_vf_wait_vchnl_resp(struct i40iw_sc_dev *dev) { struct i40iw_device *iwdev = dev->back_dev; - enum i40iw_status_code err_code = 0; int timeout_ret; i40iw_debug(dev, I40IW_DEBUG_VIRT, "%s[%u] dev %p, iwdev %p\n", __func__, __LINE__, dev, iwdev); - atomic_add(2, &iwdev->vchnl_msgs); + + atomic_set(&iwdev->vchnl_msgs, 2); timeout_ret = wait_event_timeout(iwdev->vchnl_waitq, (atomic_read(&iwdev->vchnl_msgs) == 1), I40IW_VCHNL_EVENT_TIMEOUT); atomic_dec(&iwdev->vchnl_msgs); if (!timeout_ret) { i40iw_pr_err("virt channel completion timeout = 0x%x\n", timeout_ret); - err_code = I40IW_ERR_TIMEOUT; + atomic_set(&iwdev->vchnl_msgs, 0); + dev->vchnl_up = false; + return I40IW_ERR_TIMEOUT; } - return err_code; + wake_up(&dev->vf_reqs); + return 0; } /** diff --git a/drivers/infiniband/hw/i40iw/i40iw_verbs.c b/drivers/infiniband/hw/i40iw/i40iw_verbs.c index 40444c0557e4..6359a3ebb05a 100644 --- a/drivers/infiniband/hw/i40iw/i40iw_verbs.c +++ b/drivers/infiniband/hw/i40iw/i40iw_verbs.c @@ -2148,7 +2148,6 @@ static int i40iw_get_protocol_stats(struct ib_device *ibdev, struct i40iw_dev_hw_stats *hw_stats = &devstat->hw_stats; struct timespec curr_time; static struct timespec last_rd_time = {0, 0}; - enum i40iw_status_code status = 0; unsigned long flags; curr_time = current_kernel_time(); @@ -2161,11 +2160,8 @@ static int i40iw_get_protocol_stats(struct ib_device *ibdev, spin_unlock_irqrestore(&devstat->stats_lock, flags); } else { if (((u64)curr_time.tv_sec - (u64)last_rd_time.tv_sec) > 1) - status = i40iw_vchnl_vf_get_pe_stats(dev, - &devstat->hw_stats); - - if (status) - return -ENOSYS; + if (i40iw_vchnl_vf_get_pe_stats(dev, &devstat->hw_stats)) + return -ENOSYS; } stats->iw.ipInReceives = hw_stats->stat_value_64[I40IW_HW_STAT_INDEX_IP4RXPKTS] + diff --git a/drivers/infiniband/hw/i40iw/i40iw_virtchnl.c b/drivers/infiniband/hw/i40iw/i40iw_virtchnl.c index 6b68f7890b76..4e1d7c665dc5 100644 --- a/drivers/infiniband/hw/i40iw/i40iw_virtchnl.c +++ b/drivers/infiniband/hw/i40iw/i40iw_virtchnl.c @@ -437,11 +437,9 @@ enum i40iw_status_code i40iw_vchnl_recv_pf(struct i40iw_sc_dev *dev, vchnl_pf_send_get_ver_resp(dev, vf_id, vchnl_msg); return I40IW_SUCCESS; } - for (iw_vf_idx = 0; iw_vf_idx < I40IW_MAX_PE_ENABLED_VF_COUNT; - iw_vf_idx++) { + for (iw_vf_idx = 0; iw_vf_idx < I40IW_MAX_PE_ENABLED_VF_COUNT; iw_vf_idx++) { if (!dev->vf_dev[iw_vf_idx]) { - if (first_avail_iw_vf == - I40IW_MAX_PE_ENABLED_VF_COUNT) + if (first_avail_iw_vf == I40IW_MAX_PE_ENABLED_VF_COUNT) first_avail_iw_vf = iw_vf_idx; continue; } @@ -596,23 +594,25 @@ enum i40iw_status_code i40iw_vchnl_vf_get_ver(struct i40iw_sc_dev *dev, struct i40iw_virtchnl_req vchnl_req; enum i40iw_status_code ret_code; + if (!i40iw_vf_clear_to_send(dev)) + return I40IW_ERR_TIMEOUT; memset(&vchnl_req, 0, sizeof(vchnl_req)); vchnl_req.dev = dev; vchnl_req.parm = vchnl_ver; vchnl_req.parm_len = sizeof(*vchnl_ver); vchnl_req.vchnl_msg = &dev->vchnl_vf_msg_buf.vchnl_msg; + ret_code = vchnl_vf_send_get_ver_req(dev, &vchnl_req); - if (!ret_code) { - ret_code = i40iw_vf_wait_vchnl_resp(dev); - if (!ret_code) - ret_code = vchnl_req.ret_code; - else - dev->vchnl_up = false; - } else { + if (ret_code) { i40iw_debug(dev, I40IW_DEBUG_VIRT, "%s Send message failed 0x%0x\n", __func__, ret_code); + return ret_code; } - return ret_code; + ret_code = i40iw_vf_wait_vchnl_resp(dev); + if (ret_code) + return ret_code; + else + return vchnl_req.ret_code; } /** @@ -626,23 +626,25 @@ enum i40iw_status_code i40iw_vchnl_vf_get_hmc_fcn(struct i40iw_sc_dev *dev, struct i40iw_virtchnl_req vchnl_req; enum i40iw_status_code ret_code; + if (!i40iw_vf_clear_to_send(dev)) + return I40IW_ERR_TIMEOUT; memset(&vchnl_req, 0, sizeof(vchnl_req)); vchnl_req.dev = dev; vchnl_req.parm = hmc_fcn; vchnl_req.parm_len = sizeof(*hmc_fcn); vchnl_req.vchnl_msg = &dev->vchnl_vf_msg_buf.vchnl_msg; + ret_code = vchnl_vf_send_get_hmc_fcn_req(dev, &vchnl_req); - if (!ret_code) { - ret_code = i40iw_vf_wait_vchnl_resp(dev); - if (!ret_code) - ret_code = vchnl_req.ret_code; - else - dev->vchnl_up = false; - } else { + if (ret_code) { i40iw_debug(dev, I40IW_DEBUG_VIRT, "%s Send message failed 0x%0x\n", __func__, ret_code); + return ret_code; } - return ret_code; + ret_code = i40iw_vf_wait_vchnl_resp(dev); + if (ret_code) + return ret_code; + else + return vchnl_req.ret_code; } /** @@ -660,25 +662,27 @@ enum i40iw_status_code i40iw_vchnl_vf_add_hmc_objs(struct i40iw_sc_dev *dev, struct i40iw_virtchnl_req vchnl_req; enum i40iw_status_code ret_code; + if (!i40iw_vf_clear_to_send(dev)) + return I40IW_ERR_TIMEOUT; memset(&vchnl_req, 0, sizeof(vchnl_req)); vchnl_req.dev = dev; vchnl_req.vchnl_msg = &dev->vchnl_vf_msg_buf.vchnl_msg; + ret_code = vchnl_vf_send_add_hmc_objs_req(dev, &vchnl_req, rsrc_type, start_index, rsrc_count); - if (!ret_code) { - ret_code = i40iw_vf_wait_vchnl_resp(dev); - if (!ret_code) - ret_code = vchnl_req.ret_code; - else - dev->vchnl_up = false; - } else { + if (ret_code) { i40iw_debug(dev, I40IW_DEBUG_VIRT, "%s Send message failed 0x%0x\n", __func__, ret_code); + return ret_code; } - return ret_code; + ret_code = i40iw_vf_wait_vchnl_resp(dev); + if (ret_code) + return ret_code; + else + return vchnl_req.ret_code; } /** @@ -696,25 +700,27 @@ enum i40iw_status_code i40iw_vchnl_vf_del_hmc_obj(struct i40iw_sc_dev *dev, struct i40iw_virtchnl_req vchnl_req; enum i40iw_status_code ret_code; + if (!i40iw_vf_clear_to_send(dev)) + return I40IW_ERR_TIMEOUT; memset(&vchnl_req, 0, sizeof(vchnl_req)); vchnl_req.dev = dev; vchnl_req.vchnl_msg = &dev->vchnl_vf_msg_buf.vchnl_msg; + ret_code = vchnl_vf_send_del_hmc_objs_req(dev, &vchnl_req, rsrc_type, start_index, rsrc_count); - if (!ret_code) { - ret_code = i40iw_vf_wait_vchnl_resp(dev); - if (!ret_code) - ret_code = vchnl_req.ret_code; - else - dev->vchnl_up = false; - } else { + if (ret_code) { i40iw_debug(dev, I40IW_DEBUG_VIRT, "%s Send message failed 0x%0x\n", __func__, ret_code); + return ret_code; } - return ret_code; + ret_code = i40iw_vf_wait_vchnl_resp(dev); + if (ret_code) + return ret_code; + else + return vchnl_req.ret_code; } /** @@ -728,21 +734,23 @@ enum i40iw_status_code i40iw_vchnl_vf_get_pe_stats(struct i40iw_sc_dev *dev, struct i40iw_virtchnl_req vchnl_req; enum i40iw_status_code ret_code; + if (!i40iw_vf_clear_to_send(dev)) + return I40IW_ERR_TIMEOUT; memset(&vchnl_req, 0, sizeof(vchnl_req)); vchnl_req.dev = dev; vchnl_req.parm = hw_stats; vchnl_req.parm_len = sizeof(*hw_stats); vchnl_req.vchnl_msg = &dev->vchnl_vf_msg_buf.vchnl_msg; + ret_code = vchnl_vf_send_get_pe_stats_req(dev, &vchnl_req); - if (!ret_code) { - ret_code = i40iw_vf_wait_vchnl_resp(dev); - if (!ret_code) - ret_code = vchnl_req.ret_code; - else - dev->vchnl_up = false; - } else { + if (ret_code) { i40iw_debug(dev, I40IW_DEBUG_VIRT, "%s Send message failed 0x%0x\n", __func__, ret_code); + return ret_code; } - return ret_code; + ret_code = i40iw_vf_wait_vchnl_resp(dev); + if (ret_code) + return ret_code; + else + return vchnl_req.ret_code; } -- 2.20.1