From patchwork Tue Feb 17 13:47:17 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Zhou, Danny" X-Patchwork-Id: 3423 Return-Path: X-Original-To: patchwork@dpdk.org Delivered-To: patchwork@dpdk.org Received: from [92.243.14.124] (localhost [IPv6:::1]) by dpdk.org (Postfix) with ESMTP id 76030B672; Tue, 17 Feb 2015 14:47:41 +0100 (CET) Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by dpdk.org (Postfix) with ESMTP id 87AADB480 for ; Tue, 17 Feb 2015 14:47:37 +0100 (CET) Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga102.fm.intel.com with ESMTP; 17 Feb 2015 05:47:35 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.09,594,1418112000"; d="scan'208";a="528625998" Received: from shvmail01.sh.intel.com ([10.239.29.42]) by orsmga003.jf.intel.com with ESMTP; 17 Feb 2015 05:39:01 -0800 Received: from shecgisg004.sh.intel.com (shecgisg004.sh.intel.com [10.239.29.89]) by shvmail01.sh.intel.com with ESMTP id t1HDlWVM001405; Tue, 17 Feb 2015 21:47:32 +0800 Received: from shecgisg004.sh.intel.com (localhost [127.0.0.1]) by shecgisg004.sh.intel.com (8.13.6/8.13.6/SuSE Linux 0.8) with ESMTP id t1HDlSQO024540; Tue, 17 Feb 2015 21:47:30 +0800 Received: (from dyzhou@localhost) by shecgisg004.sh.intel.com (8.13.6/8.13.6/Submit) id t1HDlSfB024536; Tue, 17 Feb 2015 21:47:28 +0800 From: Zhou Danny To: dev@dpdk.org Date: Tue, 17 Feb 2015 21:47:17 +0800 Message-Id: <1424180839-24483-4-git-send-email-danny.zhou@intel.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1424180839-24483-1-git-send-email-danny.zhou@intel.com> References: <1424180839-24483-1-git-send-email-danny.zhou@intel.com> Subject: [dpdk-dev] [PATCH v3 3/5] igb: enable rx queue interrupts for PF X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" v3 changes - Remove unnecessary variables in e1000_mac_info - Remove spinlok from PMD v2 changes - Consolidate review comments related to coding style The patch does below for igb PF: - Setup NIC to generate MSI-X interrupts - Set the IVAR register to map interrupt causes to vectors - Implement interrupt enable/disable functions Signed-off-by: Danny Zhou Tested-by: Yong Liu --- lib/librte_pmd_e1000/e1000_ethdev.h | 3 + lib/librte_pmd_e1000/igb_ethdev.c | 228 ++++++++++++++++++++++++++++++---- 3 files changed, 209 insertions(+), 25 deletions(-) diff --git a/lib/librte_pmd_e1000/e1000_ethdev.h b/lib/librte_pmd_e1000/e1000_ethdev.h index d155e77..452c6bf 100644 --- a/lib/librte_pmd_e1000/e1000_ethdev.h +++ b/lib/librte_pmd_e1000/e1000_ethdev.h @@ -105,6 +105,9 @@ #define E1000_FTQF_QUEUE_SHIFT 16 #define E1000_FTQF_QUEUE_ENABLE 0x00000100 +/* maximum number of other interrupts besides Rx & Tx interrupts */ +#define E1000_MAX_OTHER_INTR 1 + /* structure for interrupt relative data */ struct e1000_interrupt { uint32_t flags; diff --git a/lib/librte_pmd_e1000/igb_ethdev.c b/lib/librte_pmd_e1000/igb_ethdev.c index 2a268b8..bafa332 100644 --- a/lib/librte_pmd_e1000/igb_ethdev.c +++ b/lib/librte_pmd_e1000/igb_ethdev.c @@ -97,6 +97,7 @@ static int eth_igb_flow_ctrl_get(struct rte_eth_dev *dev, static int eth_igb_flow_ctrl_set(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf); static int eth_igb_lsc_interrupt_setup(struct rte_eth_dev *dev); +static int eth_igb_rxq_interrupt_setup(struct rte_eth_dev *dev); static int eth_igb_interrupt_get_status(struct rte_eth_dev *dev); static int eth_igb_interrupt_action(struct rte_eth_dev *dev); static void eth_igb_interrupt_handler(struct rte_intr_handle *handle, @@ -191,6 +192,16 @@ static int eth_igb_filter_ctrl(struct rte_eth_dev *dev, enum rte_filter_op filter_op, void *arg); +static int eth_igb_rx_queue_intr_enable(struct rte_eth_dev *dev, + uint16_t queue_id); +static int eth_igb_rx_queue_intr_disable(struct rte_eth_dev *dev, + uint16_t queue_id); +static void eth_igb_assign_msix_vector(struct e1000_hw *hw, int8_t direction, + uint8_t queue, uint8_t msix_vector); +static void eth_igb_configure_msix_intr(struct rte_eth_dev *dev); +static void eth_igb_write_ivar(struct e1000_hw *hw, uint8_t msix_vector, + uint8_t index, uint8_t offset); + /* * Define VF Stats MACRO for Non "cleared on read" register */ @@ -250,6 +261,8 @@ static struct eth_dev_ops eth_igb_ops = { .vlan_tpid_set = eth_igb_vlan_tpid_set, .vlan_offload_set = eth_igb_vlan_offload_set, .rx_queue_setup = eth_igb_rx_queue_setup, + .rx_queue_intr_enable = eth_igb_rx_queue_intr_enable, + .rx_queue_intr_disable = eth_igb_rx_queue_intr_disable, .rx_queue_release = eth_igb_rx_queue_release, .rx_queue_count = eth_igb_rx_queue_count, .rx_descriptor_done = eth_igb_rx_descriptor_done, @@ -471,6 +484,7 @@ eth_igb_dev_init(__attribute__((unused)) struct eth_driver *eth_drv, struct e1000_vfta * shadow_vfta = E1000_DEV_PRIVATE_TO_VFTA(eth_dev->data->dev_private); uint32_t ctrl_ext; + struct rte_eth_dev_info dev_info; pci_dev = eth_dev->pci_dev; eth_dev->dev_ops = ð_igb_ops; @@ -592,6 +606,13 @@ eth_igb_dev_init(__attribute__((unused)) struct eth_driver *eth_drv, eth_dev->data->port_id, pci_dev->id.vendor_id, pci_dev->id.device_id); + /* set max interrupt vfio request */ + memset(&dev_info, 0, sizeof(dev_info)); + eth_igb_infos_get(eth_dev, &dev_info); + + pci_dev->intr_handle.max_intr = dev_info.max_rx_queues + + E1000_MAX_OTHER_INTR; + rte_intr_callback_register(&(pci_dev->intr_handle), eth_igb_interrupt_handler, (void *)eth_dev); @@ -754,7 +775,7 @@ eth_igb_start(struct rte_eth_dev *dev) { struct e1000_hw *hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private); - int ret, i, mask; + int ret, mask; uint32_t ctrl_ext; PMD_INIT_FUNC_TRACE(); @@ -794,6 +815,9 @@ eth_igb_start(struct rte_eth_dev *dev) /* configure PF module if SRIOV enabled */ igb_pf_host_configure(dev); + /* confiugre msix for rx interrupt */ + eth_igb_configure_msix_intr(dev); + /* Configure for OS presence */ igb_init_manageability(hw); @@ -821,33 +845,9 @@ eth_igb_start(struct rte_eth_dev *dev) igb_vmdq_vlan_hw_filter_enable(dev); } - /* - * Configure the Interrupt Moderation register (EITR) with the maximum - * possible value (0xFFFF) to minimize "System Partial Write" issued by - * spurious [DMA] memory updates of RX and TX ring descriptors. - * - * With a EITR granularity of 2 microseconds in the 82576, only 7/8 - * spurious memory updates per second should be expected. - * ((65535 * 2) / 1000.1000 ~= 0.131 second). - * - * Because interrupts are not used at all, the MSI-X is not activated - * and interrupt moderation is controlled by EITR[0]. - * - * Note that having [almost] disabled memory updates of RX and TX ring - * descriptors through the Interrupt Moderation mechanism, memory - * updates of ring descriptors are now moderated by the configurable - * value of Write-Back Threshold registers. - */ if ((hw->mac.type == e1000_82576) || (hw->mac.type == e1000_82580) || (hw->mac.type == e1000_i350) || (hw->mac.type == e1000_i210) || (hw->mac.type == e1000_i211)) { - uint32_t ivar; - - /* Enable all RX & TX queues in the IVAR registers */ - ivar = (uint32_t) ((E1000_IVAR_VALID << 16) | E1000_IVAR_VALID); - for (i = 0; i < 8; i++) - E1000_WRITE_REG_ARRAY(hw, E1000_IVAR0, i, ivar); - /* Configure EITR with the maximum possible value (0xFFFF) */ E1000_WRITE_REG(hw, E1000_EITR(0), 0xFFFF); } @@ -901,6 +901,10 @@ eth_igb_start(struct rte_eth_dev *dev) if (dev->data->dev_conf.intr_conf.lsc != 0) ret = eth_igb_lsc_interrupt_setup(dev); + /* check if rxq interrupt is enabled */ + if (dev->data->dev_conf.intr_conf.rxq != 0) + eth_igb_rxq_interrupt_setup(dev); + /* resume enabled intr since hw reset */ igb_intr_enable(dev); @@ -1796,6 +1800,34 @@ eth_igb_lsc_interrupt_setup(struct rte_eth_dev *dev) } /* + * It clears the interrupt causes and enables the interrupt. + * It will be called once only during nic initialized. + * + * @param dev + * Pointer to struct rte_eth_dev. + * + * @return + * - On success, zero. + * - On failure, a negative value. + */ +static int eth_igb_rxq_interrupt_setup(struct rte_eth_dev *dev) +{ + uint32_t mask, regval; + struct e1000_hw *hw = + E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private); + struct rte_eth_dev_info dev_info; + + memset(&dev_info, 0, sizeof(dev_info)); + eth_igb_infos_get(dev, &dev_info); + + mask = 0xFFFFFFFF >> (32 - dev_info.max_rx_queues); + regval = E1000_READ_REG(hw, E1000_EIMS); + E1000_WRITE_REG(hw, E1000_EIMS, regval | mask); + + return 0; +} + +/* * It reads ICR and gets interrupt causes, check it and set a bit flag * to update link status. * @@ -3256,5 +3288,151 @@ static struct rte_driver pmd_igbvf_drv = { .init = rte_igbvf_pmd_init, }; +static int +eth_igb_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t queue_id) +{ + struct e1000_hw *hw = + E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private); + uint32_t mask = 1 << queue_id; + + E1000_WRITE_REG(hw, E1000_EIMC, mask); + E1000_WRITE_FLUSH(hw); + + return 0; +} + +static int +eth_igb_rx_queue_intr_enable(struct rte_eth_dev *dev, uint16_t queue_id) +{ + struct e1000_hw *hw = + E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private); + uint32_t mask = 1 << queue_id; + uint32_t regval; + + regval = E1000_READ_REG(hw, E1000_EIMS); + E1000_WRITE_REG(hw, E1000_EIMS, regval | mask); + E1000_WRITE_FLUSH(hw); + + return 0; +} + +static void +eth_igb_write_ivar(struct e1000_hw *hw, uint8_t msix_vector, + uint8_t index, uint8_t offset) +{ + uint32_t val = E1000_READ_REG_ARRAY(hw, E1000_IVAR0, index); + + /* clear bits */ + val &= ~((uint32_t)0xFF << offset); + + /* write vector and valid bit */ + val |= (msix_vector | E1000_IVAR_VALID) << offset; + + E1000_WRITE_REG_ARRAY(hw, E1000_IVAR0, index, val); +} + +static void +eth_igb_assign_msix_vector(struct e1000_hw *hw, int8_t direction, + uint8_t queue, uint8_t msix_vector) +{ + uint32_t tmp = 0; + if (hw->mac.type == e1000_82575) { + if (direction == 0) + tmp = E1000_EICR_RX_QUEUE0 << queue; + else if (direction == 1) + tmp = E1000_EICR_TX_QUEUE0 << queue; + E1000_WRITE_REG(hw, E1000_MSIXBM(msix_vector), tmp); + } else if (hw->mac.type == e1000_82576) { + if ((direction == 0) || (direction == 1)) + eth_igb_write_ivar(hw, msix_vector, queue & 0x7, + ((queue & 0x8) << 1) + 8 * direction); + } else if ((hw->mac.type == e1000_82580) || + (hw->mac.type == e1000_i350) || + (hw->mac.type == e1000_i354) || + (hw->mac.type == e1000_i210) || + (hw->mac.type == e1000_i211)) { + if ((direction == 0) || (direction == 1)) + eth_igb_write_ivar(hw, msix_vector, + queue >> 1, + ((queue & 0x1) << 4) + 8 * direction); + } +} + +/* + * Sets up the hardware to generate MSI-X interrupts properly + * @hw + * board private structure + */ +static void +eth_igb_configure_msix_intr(struct rte_eth_dev *dev) +{ + int queue_id; + uint32_t tmpval, regval, intr_mask; + uint32_t max_rx_queues; + struct rte_eth_dev_info dev_info; + struct e1000_hw *hw = + E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private); + + memset(&dev_info, 0, sizeof(dev_info)); + eth_igb_infos_get(dev, &dev_info); + max_rx_queues = dev_info.max_rx_queues; + + /* set interrupt vector for other causes */ + if (hw->mac.type == e1000_82575) { + tmpval = E1000_READ_REG(hw, E1000_CTRL_EXT); + /* enable MSI-X PBA support */ + tmpval |= E1000_CTRL_EXT_PBA_CLR; + + /* Auto-Mask interrupts upon ICR read */ + tmpval |= E1000_CTRL_EXT_EIAME; + tmpval |= E1000_CTRL_EXT_IRCA; + + E1000_WRITE_REG(hw, E1000_CTRL_EXT, tmpval); + + /* enable msix_other interrupt */ + E1000_WRITE_REG_ARRAY(hw, E1000_MSIXBM(0), 0, E1000_EIMS_OTHER); + regval = E1000_READ_REG(hw, E1000_EIAC); + E1000_WRITE_REG(hw, E1000_EIAC, regval | E1000_EIMS_OTHER); + regval = E1000_READ_REG(hw, E1000_EIAM); + E1000_WRITE_REG(hw, E1000_EIMS, regval | E1000_EIMS_OTHER); + } else if ((hw->mac.type == e1000_82576) || + (hw->mac.type == e1000_82580) || + (hw->mac.type == e1000_i350) || + (hw->mac.type == e1000_i354) || + (hw->mac.type == e1000_i210) || + (hw->mac.type == e1000_i211)) { + /* turn on MSI-X capability first */ + E1000_WRITE_REG(hw, E1000_GPIE, E1000_GPIE_MSIX_MODE | + E1000_GPIE_PBA | E1000_GPIE_EIAME | + E1000_GPIE_NSICR); + + /* enable msix_other interrupt */ + intr_mask = 1 << max_rx_queues; + regval = E1000_READ_REG(hw, E1000_EIAC); + E1000_WRITE_REG(hw, E1000_EIAC, regval | intr_mask); + regval = E1000_READ_REG(hw, E1000_EIMS); + E1000_WRITE_REG(hw, E1000_EIMS, regval | intr_mask); + tmpval = (max_rx_queues | E1000_IVAR_VALID) << 8; + + E1000_WRITE_REG(hw, E1000_IVAR_MISC, tmpval); + } + + /* + * use EIAM and EIAC to auto-mask and auto-clear when MSI-X interrupt + * is asserted, this saves a register write for every interrupt + */ + intr_mask = 0xFFFFFFFF >> (32 - max_rx_queues); + regval = E1000_READ_REG(hw, E1000_EIAC); + E1000_WRITE_REG(hw, E1000_EIAC, regval | intr_mask); + regval = E1000_READ_REG(hw, E1000_EIAM); + E1000_WRITE_REG(hw, E1000_EIAM, regval | intr_mask); + + for (queue_id = 0; queue_id < VFIO_MAX_QUEUE_ID; queue_id++) + eth_igb_assign_msix_vector(hw, 0, queue_id, queue_id); + + E1000_WRITE_FLUSH(hw); +} + + PMD_REGISTER_DRIVER(pmd_igb_drv); PMD_REGISTER_DRIVER(pmd_igbvf_drv);