From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by dpdk.org (Postfix) with ESMTP id 68342C358 for ; Fri, 5 Jun 2015 10:20:35 +0200 (CEST) Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga103.jf.intel.com with ESMTP; 05 Jun 2015 01:20:34 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.13,557,1427785200"; d="scan'208";a="737567224" Received: from shvmail01.sh.intel.com ([10.239.29.42]) by fmsmga002.fm.intel.com with ESMTP; 05 Jun 2015 01:20:33 -0700 Received: from shecgisg004.sh.intel.com (shecgisg004.sh.intel.com [10.239.29.89]) by shvmail01.sh.intel.com with ESMTP id t558KUKH032490; Fri, 5 Jun 2015 16:20:30 +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 t558KRSR030935; Fri, 5 Jun 2015 16:20:29 +0800 Received: (from cliang18@localhost) by shecgisg004.sh.intel.com (8.13.6/8.13.6/Submit) id t558KRPK030931; Fri, 5 Jun 2015 16:20:27 +0800 From: Cunming Liang To: dev@dpdk.org Date: Fri, 5 Jun 2015 16:20:03 +0800 Message-Id: <1433492410-30832-7-git-send-email-cunming.liang@intel.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1433492410-30832-1-git-send-email-cunming.liang@intel.com> References: <1433228006-24661-1-git-send-email-cunming.liang@intel.com> <1433492410-30832-1-git-send-email-cunming.liang@intel.com> Cc: shemming@brocade.com, liang-min.wang@intel.com Subject: [dpdk-dev] [PATCH v11 06/13] eal/linux: standalone intr event fd create support 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: , X-List-Received-Date: Fri, 05 Jun 2015 08:20:36 -0000 The patch exposes intr event fd create and release for PMD. The device driver can assign the number of event associated with interrupt vector. It also provides misc functions to check 1) allows other slowpath intr(e.g. lsc); 2) intr event on fastpath is enabled or not. Signed-off-by: Cunming Liang --- v11 changes - typo cleanup lib/librte_eal/linuxapp/eal/eal_interrupts.c | 57 ++++++++++++++++++++++ .../linuxapp/eal/include/exec-env/rte_interrupts.h | 51 +++++++++++++++++++ lib/librte_eal/linuxapp/eal/rte_eal_version.map | 4 ++ 3 files changed, 112 insertions(+) diff --git a/lib/librte_eal/linuxapp/eal/eal_interrupts.c b/lib/librte_eal/linuxapp/eal/eal_interrupts.c index 1dfead5..4b191ae 100644 --- a/lib/librte_eal/linuxapp/eal/eal_interrupts.c +++ b/lib/librte_eal/linuxapp/eal/eal_interrupts.c @@ -44,6 +44,7 @@ #include #include #include +#include #include #include @@ -68,6 +69,7 @@ #include "eal_vfio.h" #define EAL_INTR_EPOLL_WAIT_FOREVER (-1) +#define NB_OTHER_INTR 1 static RTE_DEFINE_PER_LCORE(int, _epfd) = -1; /**< epoll fd per thread */ @@ -1110,3 +1112,58 @@ rte_intr_rx_ctl(struct rte_intr_handle *intr_handle, int epfd, return rc; } + +int +rte_intr_efd_enable(struct rte_intr_handle *intr_handle, uint32_t nb_efd) +{ + uint32_t i; + int fd; + uint32_t n = RTE_MIN(nb_efd, (uint32_t)RTE_MAX_RXTX_INTR_VEC_ID); + + if (intr_handle->type == RTE_INTR_HANDLE_VFIO_MSIX) { + for (i = 0; i < n; i++) { + fd = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC); + if (fd < 0) { + RTE_LOG(ERR, EAL, + "cannot setup eventfd," + "error %i (%s)\n", + errno, strerror(errno)); + return -1; + } + intr_handle->efds[i] = fd; + } + intr_handle->nb_efd = n; + intr_handle->max_intr = NB_OTHER_INTR + n; + } else { + intr_handle->efds[0] = intr_handle->fd; + intr_handle->nb_efd = RTE_MIN(nb_efd, 1U); + intr_handle->max_intr = NB_OTHER_INTR; + } + + return 0; +} + +void +rte_intr_efd_disable(struct rte_intr_handle *intr_handle) +{ + uint32_t i; + struct rte_epoll_event *rev; + + for (i = 0; i < intr_handle->nb_efd; i++) { + rev = &intr_handle->elist[i]; + if (rev->status == RTE_EPOLL_INVALID) + continue; + if (rte_epoll_ctl(rev->epfd, EPOLL_CTL_DEL, rev->fd, rev)) { + /* force free if the entry valid */ + eal_epoll_data_safe_free(rev); + rev->status = RTE_EPOLL_INVALID; + } + } + + if (intr_handle->max_intr > intr_handle->nb_efd) { + for (i = 0; i < intr_handle->nb_efd; i++) + close(intr_handle->efds[i]); + } + intr_handle->nb_efd = 0; + intr_handle->max_intr = 0; +} diff --git a/lib/librte_eal/linuxapp/eal/include/exec-env/rte_interrupts.h b/lib/librte_eal/linuxapp/eal/include/exec-env/rte_interrupts.h index 3e93a27..912cc50 100644 --- a/lib/librte_eal/linuxapp/eal/include/exec-env/rte_interrupts.h +++ b/lib/librte_eal/linuxapp/eal/include/exec-env/rte_interrupts.h @@ -166,4 +166,55 @@ int rte_intr_rx_ctl(struct rte_intr_handle *intr_handle, int epfd, int op, unsigned int vec, void *data); +/** + * It enables the fastpath event fds if it's necessary. + * It creates event fds when multi-vectors allowed, + * otherwise it multiplexes the single event fds. + * + * @param intr_handle + * Pointer to the interrupt handle. + * @param nb_vec + * Number of interrupt vector trying to enable. + * @return + * - On success, zero. + * - On failure, a negative value. + */ +int +rte_intr_efd_enable(struct rte_intr_handle *intr_handle, uint32_t nb_efd); + +/** + * It disable the fastpath event fds. + * It deletes registered eventfds and closes the open fds. + * + * @param intr_handle + * Pointer to the interrupt handle. + */ +void +rte_intr_efd_disable(struct rte_intr_handle *intr_handle); + +/** + * The fastpath interrupt is enabled or not. + * + * @param intr_handle + * Pointer to the interrupt handle. + */ +static inline int +rte_intr_dp_is_en(struct rte_intr_handle *intr_handle) +{ + return !(!intr_handle->nb_efd); +} + +/** + * The interrupt handle instance allows other cause or not. + * Other cause stands for none fastpath interrupt. + * + * @param intr_handle + * Pointer to the interrupt handle. + */ +static inline int +rte_intr_allow_others(struct rte_intr_handle *intr_handle) +{ + return !!(intr_handle->max_intr - intr_handle->nb_efd); +} + #endif /* _RTE_LINUXAPP_INTERRUPTS_H_ */ diff --git a/lib/librte_eal/linuxapp/eal/rte_eal_version.map b/lib/librte_eal/linuxapp/eal/rte_eal_version.map index 65b5ed2..d0df6b4 100644 --- a/lib/librte_eal/linuxapp/eal/rte_eal_version.map +++ b/lib/librte_eal/linuxapp/eal/rte_eal_version.map @@ -61,7 +61,11 @@ DPDK_2.0 { rte_hexdump; rte_intr_callback_register; rte_intr_callback_unregister; + rte_intr_allow_others; rte_intr_disable; + rte_intr_dp_is_en; + rte_intr_efd_enable; + rte_intr_efd_disable; rte_intr_enable; rte_intr_rx_ctl; rte_intr_tls_epfd; -- 1.8.1.4