From 90632b7592ea9a2169058aaa3a763f89ff32042e Mon Sep 17 00:00:00 2001 From: Shreyansh Jain Date: Thu, 28 Sep 2017 17:59:28 +0530 Subject: [PATCH] bus/dpaa: add layer for interrupt emulation using pthread 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 | 61 +++++++++++ 3 files changed, 199 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 f06521c5b9..5b76a4bc04 100644 --- a/drivers/bus/dpaa/Makefile +++ b/drivers/bus/dpaa/Makefile @@ -62,7 +62,8 @@ 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 # Link Pthread LDLIBS += -lpthread 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 0000000000..0017da5237 --- /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 0000000000..bee9fe57d2 --- /dev/null +++ b/drivers/bus/dpaa/base/qbman/dpaa_sys.h @@ -0,0 +1,61 @@ +/*- + * 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 + +#define DPAA_ASSERT(x) RTE_ASSERT(x) + +/* 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 */ -- 2.20.1