From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shreyansh Jain Subject: [PATCH v3 08/40] bus/dpaa: add layer for interrupt emulation using pthread Date: Wed, 23 Aug 2017 19:41:41 +0530 Message-ID: <20170823141213.25476-9-shreyansh.jain@nxp.com> References: <1499179471-19145-1-git-send-email-shreyansh.jain@nxp.com> <20170823141213.25476-1-shreyansh.jain@nxp.com> Mime-Version: 1.0 Content-Type: text/plain Cc: , To: Return-path: Received: from NAM01-BN3-obe.outbound.protection.outlook.com (mail-bn3nam01on0062.outbound.protection.outlook.com [104.47.33.62]) by dpdk.org (Postfix) with ESMTP id 8AE0990F8 for ; Wed, 23 Aug 2017 16:02:47 +0200 (CEST) In-Reply-To: <20170823141213.25476-1-shreyansh.jain@nxp.com> List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" An interrupt manager is implemented by emulating over pthreads. Handlers are registered by QBMAN layer for being notified about any interrupt request from DPAA blocks in userspace. Signed-off-by: Roy Pledge Signed-off-by: Hemant Agrawal Signed-off-by: Shreyansh Jain --- drivers/bus/dpaa/Makefile | 3 +- drivers/bus/dpaa/base/qbman/dpaa_sys.c | 136 +++++++++++++++++++++++++++++++++ drivers/bus/dpaa/base/qbman/dpaa_sys.h | 65 ++++++++++++++++ 3 files changed, 203 insertions(+), 1 deletion(-) create mode 100644 drivers/bus/dpaa/base/qbman/dpaa_sys.c create mode 100644 drivers/bus/dpaa/base/qbman/dpaa_sys.h diff --git a/drivers/bus/dpaa/Makefile b/drivers/bus/dpaa/Makefile index b0083c9..ad6f8c0 100644 --- a/drivers/bus/dpaa/Makefile +++ b/drivers/bus/dpaa/Makefile @@ -69,6 +69,7 @@ SRCS-$(CONFIG_RTE_LIBRTE_DPAA_BUS) += \ base/fman/fman_hw.c \ base/fman/of.c \ base/fman/netcfg_layer.c \ - base/qbman/process.c + base/qbman/process.c \ + base/qbman/dpaa_sys.c include $(RTE_SDK)/mk/rte.lib.mk diff --git a/drivers/bus/dpaa/base/qbman/dpaa_sys.c b/drivers/bus/dpaa/base/qbman/dpaa_sys.c new file mode 100644 index 0000000..0017da5 --- /dev/null +++ b/drivers/bus/dpaa/base/qbman/dpaa_sys.c @@ -0,0 +1,136 @@ +/*- + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * BSD LICENSE + * + * Copyright 2013-2016 Freescale Semiconductor Inc. + * Copyright 2017 NXP. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of the above-listed copyright holders nor the + * names of any contributors may be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * GPL LICENSE SUMMARY + * + * ALTERNATIVELY, this software may be distributed under the terms of the + * GNU General Public License ("GPL") as published by the Free Software + * Foundation, either version 2 of that License or (at your option) any + * later version. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include +#include "dpaa_sys.h" + +struct process_interrupt { + int irq; + irqreturn_t (*isr)(int irq, void *arg); + unsigned long flags; + const char *name; + void *arg; + struct list_head node; +}; + +static COMPAT_LIST_HEAD(process_irq_list); +static pthread_mutex_t process_irq_lock = PTHREAD_MUTEX_INITIALIZER; + +static void process_interrupt_install(struct process_interrupt *irq) +{ + int ret; + /* Add the irq to the end of the list */ + ret = pthread_mutex_lock(&process_irq_lock); + assert(!ret); + list_add_tail(&irq->node, &process_irq_list); + ret = pthread_mutex_unlock(&process_irq_lock); + assert(!ret); +} + +static void process_interrupt_remove(struct process_interrupt *irq) +{ + int ret; + + ret = pthread_mutex_lock(&process_irq_lock); + assert(!ret); + list_del(&irq->node); + ret = pthread_mutex_unlock(&process_irq_lock); + assert(!ret); +} + +static struct process_interrupt *process_interrupt_find(int irq_num) +{ + int ret; + struct process_interrupt *i = NULL; + + ret = pthread_mutex_lock(&process_irq_lock); + assert(!ret); + list_for_each_entry(i, &process_irq_list, node) { + if (i->irq == irq_num) + goto done; + } +done: + ret = pthread_mutex_unlock(&process_irq_lock); + assert(!ret); + return i; +} + +/* This is the interface from the platform-agnostic driver code to (de)register + * interrupt handlers. We simply create/destroy corresponding structs. + */ +int qbman_request_irq(int irq, irqreturn_t (*isr)(int irq, void *arg), + unsigned long flags, const char *name, + void *arg __maybe_unused) +{ + struct process_interrupt *irq_node = + kmalloc(sizeof(*irq_node), GFP_KERNEL); + + if (!irq_node) + return -ENOMEM; + irq_node->irq = irq; + irq_node->isr = isr; + irq_node->flags = flags; + irq_node->name = name; + irq_node->arg = arg; + process_interrupt_install(irq_node); + return 0; +} + +int qbman_free_irq(int irq, __maybe_unused void *arg) +{ + struct process_interrupt *irq_node = process_interrupt_find(irq); + + if (!irq_node) + return -EINVAL; + process_interrupt_remove(irq_node); + kfree(irq_node); + return 0; +} + +/* This is the interface from the platform-specific driver code to obtain + * interrupt handlers that have been registered. + */ +void qbman_invoke_irq(int irq) +{ + struct process_interrupt *irq_node = process_interrupt_find(irq); + + if (irq_node) + irq_node->isr(irq, irq_node->arg); +} diff --git a/drivers/bus/dpaa/base/qbman/dpaa_sys.h b/drivers/bus/dpaa/base/qbman/dpaa_sys.h new file mode 100644 index 0000000..c53035a --- /dev/null +++ b/drivers/bus/dpaa/base/qbman/dpaa_sys.h @@ -0,0 +1,65 @@ +/*- + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * BSD LICENSE + * + * Copyright 2008-2016 Freescale Semiconductor Inc. + * Copyright 2017 NXP. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of the above-listed copyright holders nor the + * names of any contributors may be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * GPL LICENSE SUMMARY + * + * ALTERNATIVELY, this software may be distributed under the terms of the + * GNU General Public License ("GPL") as published by the Free Software + * Foundation, either version 2 of that License or (at your option) any + * later version. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef __DPAA_SYS_H +#define __DPAA_SYS_H + +#include + +/* For 2-element tables related to cache-inhibited and cache-enabled mappings */ +#define DPAA_PORTAL_CE 0 +#define DPAA_PORTAL_CI 1 + +#ifdef RTE_LIBRTE_DPAA_CHECKING +#define DPAA_ASSERT(x) ASSERT(x) +#else +#define DPAA_ASSERT(x) do { } while (0) +#endif + +/* This is the interface from the platform-agnostic driver code to (de)register + * interrupt handlers. We simply create/destroy corresponding structs. + */ +int qbman_request_irq(int irq, irqreturn_t (*isr)(int irq, void *arg), + unsigned long flags, const char *name, void *arg); +int qbman_free_irq(int irq, void *arg); + +void qbman_invoke_irq(int irq); + +#endif /* __DPAA_SYS_H */ -- 2.9.3