From: Hyong Youb Kim Date: Thu, 8 Mar 2018 02:46:59 +0000 (-0800) Subject: net/enic: support Rx queue interrupts X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=0f872d31295df39cedf9edfe134f48f3fdcefcbf;p=dpdk.git net/enic: support Rx queue interrupts Enable rx queue interrupts if the app requests them, and vNIC has enough interrupt resources. Use interrupt vector 0 for link status and errors. Use vector 1 for rx queue 0, vector 2 for rx queue 1, and so on. So, with n rx queues, vNIC needs to have at n + 1 interrupts. For VIC, enabling and disabling rx queue interrupts are simply mask/unmask operations. VIC's credit based interrupt moderation is not used, as the app wants to explicitly control when to enable/disable interrupts. This version requires MSI-X (vfio-pci). Sharing one interrupt for link status and rx queues is possible, but is rather complex and has no user demands. Signed-off-by: Hyong Youb Kim Reviewed-by: John Daley --- diff --git a/doc/guides/nics/enic.rst b/doc/guides/nics/enic.rst index 0e655e9e3e..7e19cf88a4 100644 --- a/doc/guides/nics/enic.rst +++ b/doc/guides/nics/enic.rst @@ -114,11 +114,16 @@ Configuration information - **Interrupts** - Only one interrupt per vNIC interface should be configured in the UCS + At least one interrupt per vNIC interface should be configured in the UCS manager regardless of the number receive/transmit queues. The ENIC PMD uses this interrupt to get information about link status and errors in the fast path. + In addition to the interrupt for link status and errors, when using Rx queue + interrupts, increase the number of configured interrupts so that there is at + least one interrupt for each Rx queue. For example, if the app uses 3 Rx + queues and wants to use per-queue interrupts, configure 4 (3 + 1) interrupts. + .. _enic-flow-director: Flow director support diff --git a/doc/guides/nics/features/enic.ini b/doc/guides/nics/features/enic.ini index e79d7277dd..ea171a45b8 100644 --- a/doc/guides/nics/features/enic.ini +++ b/doc/guides/nics/features/enic.ini @@ -6,6 +6,7 @@ [Features] Link status = Y Link status event = Y +Rx interrupt = Y Queue start/stop = Y MTU update = Y Jumbo frame = Y diff --git a/drivers/net/enic/enic.h b/drivers/net/enic/enic.h index 1b3813a585..adccc8ac52 100644 --- a/drivers/net/enic/enic.h +++ b/drivers/net/enic/enic.h @@ -49,6 +49,15 @@ #define ENICPMD_FDIR_MAX 64 +/* + * Interrupt 0: LSC and errors + * Interrupt 1: rx queue 0 + * Interrupt 2: rx queue 1 + * ... + */ +#define ENICPMD_LSC_INTR_OFFSET 0 +#define ENICPMD_RXQ_INTR_OFFSET 1 + struct enic_fdir_node { struct rte_eth_fdir_filter filter; u16 fltr_id; @@ -126,9 +135,9 @@ struct enic { struct vnic_cq *cq; unsigned int cq_count; /* equals rq_count + wq_count */ - /* interrupt resource */ - struct vnic_intr intr; - unsigned int intr_count; + /* interrupt vectors (len = conf_intr_count) */ + struct vnic_intr *intr; + unsigned int intr_count; /* equals enabled interrupts (lsc + rxqs) */ /* software counters */ struct enic_soft_stats soft_stats; diff --git a/drivers/net/enic/enic_ethdev.c b/drivers/net/enic/enic_ethdev.c index 6dd72729e1..2a289b6a47 100644 --- a/drivers/net/enic/enic_ethdev.c +++ b/drivers/net/enic/enic_ethdev.c @@ -738,6 +738,26 @@ static void enicpmd_dev_txq_info_get(struct rte_eth_dev *dev, /* tx_thresh, and all the other fields are not applicable for enic */ } +static int enicpmd_dev_rx_queue_intr_enable(struct rte_eth_dev *eth_dev, + uint16_t rx_queue_id) +{ + struct enic *enic = pmd_priv(eth_dev); + + ENICPMD_FUNC_TRACE(); + vnic_intr_unmask(&enic->intr[rx_queue_id + ENICPMD_RXQ_INTR_OFFSET]); + return 0; +} + +static int enicpmd_dev_rx_queue_intr_disable(struct rte_eth_dev *eth_dev, + uint16_t rx_queue_id) +{ + struct enic *enic = pmd_priv(eth_dev); + + ENICPMD_FUNC_TRACE(); + vnic_intr_mask(&enic->intr[rx_queue_id + ENICPMD_RXQ_INTR_OFFSET]); + return 0; +} + static const struct eth_dev_ops enicpmd_eth_dev_ops = { .dev_configure = enicpmd_dev_configure, .dev_start = enicpmd_dev_start, @@ -770,6 +790,8 @@ static const struct eth_dev_ops enicpmd_eth_dev_ops = { .rx_descriptor_done = NULL, .tx_queue_setup = enicpmd_dev_tx_queue_setup, .tx_queue_release = enicpmd_dev_tx_queue_release, + .rx_queue_intr_enable = enicpmd_dev_rx_queue_intr_enable, + .rx_queue_intr_disable = enicpmd_dev_rx_queue_intr_disable, .rxq_info_get = enicpmd_dev_rxq_info_get, .txq_info_get = enicpmd_dev_txq_info_get, .dev_led_on = NULL, diff --git a/drivers/net/enic/enic_main.c b/drivers/net/enic/enic_main.c index 235ef59405..77eb34ce45 100644 --- a/drivers/net/enic/enic_main.c +++ b/drivers/net/enic/enic_main.c @@ -200,10 +200,16 @@ void enic_init_vnic_resources(struct enic *enic) { unsigned int error_interrupt_enable = 1; unsigned int error_interrupt_offset = 0; + unsigned int rxq_interrupt_enable = 0; + unsigned int rxq_interrupt_offset; unsigned int index = 0; unsigned int cq_idx; struct vnic_rq *data_rq; + if (enic->rte_dev->data->dev_conf.intr_conf.rxq) { + rxq_interrupt_enable = 1; + rxq_interrupt_offset = ENICPMD_RXQ_INTR_OFFSET; + } for (index = 0; index < enic->rq_count; index++) { cq_idx = enic_cq_rq(enic, enic_rte_rq_idx_to_sop_idx(index)); @@ -225,11 +231,13 @@ void enic_init_vnic_resources(struct enic *enic) 0 /* cq_head */, 0 /* cq_tail */, 1 /* cq_tail_color */, - 0 /* interrupt_enable */, + rxq_interrupt_enable, 1 /* cq_entry_enable */, 0 /* cq_message_enable */, - 0 /* interrupt offset */, + rxq_interrupt_offset, 0 /* cq_message_addr */); + if (rxq_interrupt_enable) + rxq_interrupt_offset++; } for (index = 0; index < enic->wq_count; index++) { @@ -252,10 +260,12 @@ void enic_init_vnic_resources(struct enic *enic) (u64)enic->wq[index].cqmsg_rz->iova); } - vnic_intr_init(&enic->intr, - enic->config.intr_timer_usec, - enic->config.intr_timer_type, - /*mask_on_assertion*/1); + for (index = 0; index < enic->intr_count; index++) { + vnic_intr_init(&enic->intr[index], + enic->config.intr_timer_usec, + enic->config.intr_timer_type, + /*mask_on_assertion*/1); + } } @@ -411,13 +421,62 @@ enic_intr_handler(void *arg) struct rte_eth_dev *dev = (struct rte_eth_dev *)arg; struct enic *enic = pmd_priv(dev); - vnic_intr_return_all_credits(&enic->intr); + vnic_intr_return_all_credits(&enic->intr[ENICPMD_LSC_INTR_OFFSET]); enic_link_update(enic); _rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL); enic_log_q_error(enic); } +static int enic_rxq_intr_init(struct enic *enic) +{ + struct rte_intr_handle *intr_handle; + uint32_t rxq_intr_count, i; + int err; + + intr_handle = enic->rte_dev->intr_handle; + if (!enic->rte_dev->data->dev_conf.intr_conf.rxq) + return 0; + /* + * Rx queue interrupts only work when we have MSI-X interrupts, + * one per queue. Sharing one interrupt is technically + * possible with VIC, but it is not worth the complications it brings. + */ + if (!rte_intr_cap_multiple(intr_handle)) { + dev_err(enic, "Rx queue interrupts require MSI-X interrupts" + " (vfio-pci driver)\n"); + return -ENOTSUP; + } + rxq_intr_count = enic->intr_count - ENICPMD_RXQ_INTR_OFFSET; + err = rte_intr_efd_enable(intr_handle, rxq_intr_count); + if (err) { + dev_err(enic, "Failed to enable event fds for Rx queue" + " interrupts\n"); + return err; + } + intr_handle->intr_vec = rte_zmalloc("enic_intr_vec", + rxq_intr_count * sizeof(int), 0); + if (intr_handle->intr_vec == NULL) { + dev_err(enic, "Failed to allocate intr_vec\n"); + return -ENOMEM; + } + for (i = 0; i < rxq_intr_count; i++) + intr_handle->intr_vec[i] = i + ENICPMD_RXQ_INTR_OFFSET; + return 0; +} + +static void enic_rxq_intr_deinit(struct enic *enic) +{ + struct rte_intr_handle *intr_handle; + + intr_handle = enic->rte_dev->intr_handle; + rte_intr_efd_disable(intr_handle); + if (intr_handle->intr_vec != NULL) { + rte_free(intr_handle->intr_vec); + intr_handle->intr_vec = NULL; + } +} + int enic_enable(struct enic *enic) { unsigned int index; @@ -434,6 +493,9 @@ int enic_enable(struct enic *enic) if (eth_dev->data->dev_conf.intr_conf.lsc) vnic_dev_notify_set(enic->vdev, 0); + err = enic_rxq_intr_init(enic); + if (err) + return err; if (enic_clsf_init(enic)) dev_warning(enic, "Init of hash table for clsf failed."\ "Flow director feature will not work\n"); @@ -471,7 +533,8 @@ int enic_enable(struct enic *enic) enic_intr_handler, (void *)enic->rte_dev); rte_intr_enable(&(enic->pdev->intr_handle)); - vnic_intr_unmask(&enic->intr); + /* Unmask LSC interrupt */ + vnic_intr_unmask(&enic->intr[ENICPMD_LSC_INTR_OFFSET]); return 0; } @@ -479,17 +542,21 @@ int enic_enable(struct enic *enic) int enic_alloc_intr_resources(struct enic *enic) { int err; + unsigned int i; dev_info(enic, "vNIC resources used: "\ "wq %d rq %d cq %d intr %d\n", enic->wq_count, enic_vnic_rq_count(enic), enic->cq_count, enic->intr_count); - err = vnic_intr_alloc(enic->vdev, &enic->intr, 0); - if (err) - enic_free_vnic_resources(enic); - - return err; + for (i = 0; i < enic->intr_count; i++) { + err = vnic_intr_alloc(enic->vdev, &enic->intr[i], i); + if (err) { + enic_free_vnic_resources(enic); + return err; + } + } + return 0; } void enic_free_rq(void *rxq) @@ -837,8 +904,11 @@ int enic_disable(struct enic *enic) unsigned int i; int err; - vnic_intr_mask(&enic->intr); - (void)vnic_intr_masked(&enic->intr); /* flush write */ + for (i = 0; i < enic->intr_count; i++) { + vnic_intr_mask(&enic->intr[i]); + (void)vnic_intr_masked(&enic->intr[i]); /* flush write */ + } + enic_rxq_intr_deinit(enic); rte_intr_disable(&enic->pdev->intr_handle); rte_intr_callback_unregister(&enic->pdev->intr_handle, enic_intr_handler, @@ -881,7 +951,8 @@ int enic_disable(struct enic *enic) vnic_rq_clean(&enic->rq[i], enic_free_rq_buf); for (i = 0; i < enic->cq_count; i++) vnic_cq_clean(&enic->cq[i]); - vnic_intr_clean(&enic->intr); + for (i = 0; i < enic->intr_count; i++) + vnic_intr_clean(&enic->intr[i]); return 0; } @@ -1170,6 +1241,7 @@ static void enic_dev_deinit(struct enic *enic) rte_free(eth_dev->data->mac_addrs); rte_free(enic->cq); + rte_free(enic->intr); rte_free(enic->rq); rte_free(enic->wq); } @@ -1179,12 +1251,16 @@ int enic_set_vnic_res(struct enic *enic) { struct rte_eth_dev *eth_dev = enic->rte_dev; int rc = 0; - unsigned int required_rq, required_wq, required_cq; + unsigned int required_rq, required_wq, required_cq, required_intr; /* Always use two vNIC RQs per eth_dev RQ, regardless of Rx scatter. */ required_rq = eth_dev->data->nb_rx_queues * 2; required_wq = eth_dev->data->nb_tx_queues; required_cq = eth_dev->data->nb_rx_queues + eth_dev->data->nb_tx_queues; + required_intr = 1; /* 1 for LSC even if intr_conf.lsc is 0 */ + if (eth_dev->data->dev_conf.intr_conf.rxq) { + required_intr += eth_dev->data->nb_rx_queues; + } if (enic->conf_rq_count < required_rq) { dev_err(dev, "Not enough Receive queues. Requested:%u which uses %d RQs on VIC, Configured:%u\n", @@ -1203,11 +1279,18 @@ int enic_set_vnic_res(struct enic *enic) required_cq, enic->conf_cq_count); rc = -EINVAL; } + if (enic->conf_intr_count < required_intr) { + dev_err(dev, "Not enough Interrupts to support Rx queue" + " interrupts. Required:%u, Configured:%u\n", + required_intr, enic->conf_intr_count); + rc = -EINVAL; + } if (rc == 0) { enic->rq_count = eth_dev->data->nb_rx_queues; enic->wq_count = eth_dev->data->nb_tx_queues; enic->cq_count = enic->rq_count + enic->wq_count; + enic->intr_count = required_intr; } return rc; @@ -1409,6 +1492,8 @@ static int enic_dev_init(struct enic *enic) /* Queue counts may be zeros. rte_zmalloc returns NULL in that case. */ enic->cq = rte_zmalloc("enic_vnic_cq", sizeof(struct vnic_cq) * enic->conf_cq_count, 8); + enic->intr = rte_zmalloc("enic_vnic_intr", sizeof(struct vnic_intr) * + enic->conf_intr_count, 8); enic->rq = rte_zmalloc("enic_vnic_rq", sizeof(struct vnic_rq) * enic->conf_rq_count, 8); enic->wq = rte_zmalloc("enic_vnic_wq", sizeof(struct vnic_wq) * @@ -1417,6 +1502,10 @@ static int enic_dev_init(struct enic *enic) dev_err(enic, "failed to allocate vnic_cq, aborting.\n"); return -1; } + if (enic->conf_intr_count > 0 && enic->intr == NULL) { + dev_err(enic, "failed to allocate vnic_intr, aborting.\n"); + return -1; + } if (enic->conf_rq_count > 0 && enic->rq == NULL) { dev_err(enic, "failed to allocate vnic_rq, aborting.\n"); return -1; diff --git a/drivers/net/enic/enic_res.c b/drivers/net/enic/enic_res.c index d8f7892c33..e7ad6767e4 100644 --- a/drivers/net/enic/enic_res.c +++ b/drivers/net/enic/enic_res.c @@ -222,7 +222,8 @@ void enic_free_vnic_resources(struct enic *enic) vnic_rq_free(&enic->rq[i]); for (i = 0; i < enic->cq_count; i++) vnic_cq_free(&enic->cq[i]); - vnic_intr_free(&enic->intr); + for (i = 0; i < enic->intr_count; i++) + vnic_intr_free(&enic->intr[i]); } void enic_get_res_counts(struct enic *enic)