Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751228AbdGZFFf (ORCPT ); Wed, 26 Jul 2017 01:05:35 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:49593 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751040AbdGZFFb (ORCPT ); Wed, 26 Jul 2017 01:05:31 -0400 From: Shilpasri G Bhat To: stewart@linux.vnet.ibm.com, cyrilbur@gmail.com Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, benh@kernel.crashing.org, paulus@samba.org, mpe@ellerman.id.au, ego@linux.vnet.ibm.com, svaidy@linux.vnet.ibm.com, Shilpasri G Bhat Subject: [PATCH V8 3/3] powernv: Add support to clear sensor groups data Date: Wed, 26 Jul 2017 10:35:09 +0530 X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1501045509-21732-1-git-send-email-shilpa.bhat@linux.vnet.ibm.com> References: <1501045509-21732-1-git-send-email-shilpa.bhat@linux.vnet.ibm.com> X-TM-AS-MML: disable x-cbid: 17072605-0008-0000-0000-000001520091 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17072605-0009-0000-0000-0000098359C0 Message-Id: <1501045509-21732-4-git-send-email-shilpa.bhat@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2017-07-26_02:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1706020000 definitions=main-1707260075 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 7853 Lines: 237 Adds support for clearing different sensor groups. OCC inband sensor groups like CSM, Profiler, Job Scheduler can be cleared using this driver. The min/max of all sensors belonging to these sensor groups will be cleared. Signed-off-by: Shilpasri G Bhat --- Changes from V7: - s/send_occ_command/opal_sensor_groups_clear_history arch/powerpc/include/asm/opal-api.h | 3 +- arch/powerpc/include/asm/opal.h | 2 + arch/powerpc/include/uapi/asm/opal-occ.h | 23 ++++++ arch/powerpc/platforms/powernv/Makefile | 2 +- arch/powerpc/platforms/powernv/opal-occ.c | 109 +++++++++++++++++++++++++ arch/powerpc/platforms/powernv/opal-wrappers.S | 1 + arch/powerpc/platforms/powernv/opal.c | 3 + 7 files changed, 141 insertions(+), 2 deletions(-) create mode 100644 arch/powerpc/include/uapi/asm/opal-occ.h create mode 100644 arch/powerpc/platforms/powernv/opal-occ.c diff --git a/arch/powerpc/include/asm/opal-api.h b/arch/powerpc/include/asm/opal-api.h index 0d37315..342738a 100644 --- a/arch/powerpc/include/asm/opal-api.h +++ b/arch/powerpc/include/asm/opal-api.h @@ -195,7 +195,8 @@ #define OPAL_SET_POWERCAP 153 #define OPAL_GET_PSR 154 #define OPAL_SET_PSR 155 -#define OPAL_LAST 155 +#define OPAL_SENSOR_GROUPS_CLEAR 156 +#define OPAL_LAST 156 /* Device tree flags */ diff --git a/arch/powerpc/include/asm/opal.h b/arch/powerpc/include/asm/opal.h index 58b30a4..92db6af 100644 --- a/arch/powerpc/include/asm/opal.h +++ b/arch/powerpc/include/asm/opal.h @@ -271,6 +271,7 @@ int64_t opal_xive_set_vp_info(uint64_t vp, int opal_set_powercap(u32 handle, int token, u32 pcap); int opal_get_power_shifting_ratio(u32 handle, int token, u32 *psr); int opal_set_power_shifting_ratio(u32 handle, int token, u32 psr); +int opal_sensor_groups_clear(u32 group_hndl, int token); /* Internal functions */ extern int early_init_dt_scan_opal(unsigned long node, const char *uname, @@ -351,6 +352,7 @@ static inline int opal_get_async_rc(struct opal_msg msg) void opal_powercap_init(void); void opal_psr_init(void); +int opal_sensor_groups_clear_history(u32 handle); #endif /* __ASSEMBLY__ */ diff --git a/arch/powerpc/include/uapi/asm/opal-occ.h b/arch/powerpc/include/uapi/asm/opal-occ.h new file mode 100644 index 0000000..97c45e2 --- /dev/null +++ b/arch/powerpc/include/uapi/asm/opal-occ.h @@ -0,0 +1,23 @@ +/* + * OPAL OCC command interface + * Supported on POWERNV platform + * + * (C) Copyright IBM 2017 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef _UAPI_ASM_POWERPC_OPAL_OCC_H_ +#define _UAPI_ASM_POWERPC_OPAL_OCC_H_ + +#define OPAL_OCC_IOCTL_CLEAR_SENSOR_GROUPS _IOR('o', 1, u32) + +#endif /* _UAPI_ASM_POWERPC_OPAL_OCC_H */ diff --git a/arch/powerpc/platforms/powernv/Makefile b/arch/powerpc/platforms/powernv/Makefile index 9ed7d33..f193b33 100644 --- a/arch/powerpc/platforms/powernv/Makefile +++ b/arch/powerpc/platforms/powernv/Makefile @@ -2,7 +2,7 @@ obj-y += setup.o opal-wrappers.o opal.o opal-async.o idle.o obj-y += opal-rtc.o opal-nvram.o opal-lpc.o opal-flash.o obj-y += rng.o opal-elog.o opal-dump.o opal-sysparam.o opal-sensor.o obj-y += opal-msglog.o opal-hmi.o opal-power.o opal-irqchip.o -obj-y += opal-kmsg.o opal-powercap.o opal-psr.o +obj-y += opal-kmsg.o opal-powercap.o opal-psr.o opal-occ.o obj-$(CONFIG_SMP) += smp.o subcore.o subcore-asm.o obj-$(CONFIG_PCI) += pci.o pci-ioda.o npu-dma.o diff --git a/arch/powerpc/platforms/powernv/opal-occ.c b/arch/powerpc/platforms/powernv/opal-occ.c new file mode 100644 index 0000000..d1d4b28 --- /dev/null +++ b/arch/powerpc/platforms/powernv/opal-occ.c @@ -0,0 +1,109 @@ +/* + * Copyright IBM Corporation 2017 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#define pr_fmt(fmt) "opal-occ: " fmt + +#include +#include +#include +#include +#include +#include +#include + +DEFINE_MUTEX(opal_occ_mutex); + +int opal_sensor_groups_clear_history(u32 handle) +{ + struct opal_msg async_msg; + int token, rc; + + token = opal_async_get_token_interruptible(); + if (token < 0) { + pr_devel("Failed to get the token %d\n", token); + return token; + } + + mutex_lock(&opal_occ_mutex); + rc = opal_sensor_groups_clear(handle, token); + if (rc == OPAL_ASYNC_COMPLETION) { + rc = opal_async_wait_response(token, &async_msg); + if (rc) { + pr_devel("Failed to wait for async response %d\n", rc); + goto out; + } + rc = opal_get_async_rc(async_msg); + } +out: + mutex_unlock(&opal_occ_mutex); + opal_async_release_token(token); + return opal_error_code(rc); +} +EXPORT_SYMBOL_GPL(opal_sensor_groups_clear_history); + +static long opal_occ_ioctl(struct file *file, unsigned int cmd, + unsigned long param) +{ + int rc = -EINVAL; + + switch (cmd) { + case OPAL_OCC_IOCTL_CLEAR_SENSOR_GROUPS: + rc = opal_sensor_groups_clear_history(param); + break; + default: + break; + } + + return rc; +} + +static const struct file_operations opal_occ_fops = { + .unlocked_ioctl = opal_occ_ioctl, + .owner = THIS_MODULE, +}; + +static struct miscdevice occ_dev = { + .minor = MISC_DYNAMIC_MINOR, + .name = "occ", + .fops = &opal_occ_fops, +}; + +static int opal_occ_probe(struct platform_device *pdev) +{ + return misc_register(&occ_dev); +} + +static int opal_occ_remove(struct platform_device *pdev) +{ + misc_deregister(&occ_dev); + return 0; +} + +static const struct of_device_id opal_occ_match[] = { + { .compatible = "ibm,opal-occ-sensor-group" }, + { }, +}; + +static struct platform_driver opal_occ_driver = { + .driver = { + .name = "opal-occ", + .of_match_table = opal_occ_match, + }, + .probe = opal_occ_probe, + .remove = opal_occ_remove, +}; + +module_platform_driver(opal_occ_driver); + +MODULE_DESCRIPTION("PowerNV OPAL-OCC driver"); +MODULE_LICENSE("GPL"); diff --git a/arch/powerpc/platforms/powernv/opal-wrappers.S b/arch/powerpc/platforms/powernv/opal-wrappers.S index 9867726..c1130e8 100644 --- a/arch/powerpc/platforms/powernv/opal-wrappers.S +++ b/arch/powerpc/platforms/powernv/opal-wrappers.S @@ -314,3 +314,4 @@ OPAL_CALL(opal_get_powercap, OPAL_GET_POWERCAP); OPAL_CALL(opal_set_powercap, OPAL_SET_POWERCAP); OPAL_CALL(opal_get_power_shifting_ratio, OPAL_GET_PSR); OPAL_CALL(opal_set_power_shifting_ratio, OPAL_SET_PSR); +OPAL_CALL(opal_sensor_groups_clear, OPAL_SENSOR_GROUPS_CLEAR); diff --git a/arch/powerpc/platforms/powernv/opal.c b/arch/powerpc/platforms/powernv/opal.c index 280a736..097c33c 100644 --- a/arch/powerpc/platforms/powernv/opal.c +++ b/arch/powerpc/platforms/powernv/opal.c @@ -842,6 +842,9 @@ static int __init opal_init(void) /* Initialise OPAL Power-Shifting-Ratio interface */ opal_psr_init(); + /* Initialize platform device: OCC interface */ + opal_pdev_init("ibm,opal-occ-sensor-group"); + return 0; } machine_subsys_initcall(powernv, opal_init); -- 1.8.3.1