Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753889AbaGJVzB (ORCPT ); Thu, 10 Jul 2014 17:55:01 -0400 Received: from mail-wg0-f44.google.com ([74.125.82.44]:60980 "EHLO mail-wg0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753390AbaGJVy6 (ORCPT ); Thu, 10 Jul 2014 17:54:58 -0400 From: Oded Gabbay X-Google-Original-From: Oded Gabbay To: David Airlie , Alex Deucher , Jerome Glisse Cc: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, John Bridgman , Andrew Lewycky , Joerg Roedel , Evgeny Pinchuk , Oded Gabbay , Ben Goz , Alexey Skidanov , linux-api@vger.kernel.org Subject: [PATCH 32/83] hsa/radeon: implementing IOCTL for clock counters Date: Fri, 11 Jul 2014 00:53:48 +0300 Message-Id: <1405029279-6894-4-git-send-email-oded.gabbay@amd.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1405029279-6894-1-git-send-email-oded.gabbay@amd.com> References: <1405029279-6894-1-git-send-email-oded.gabbay@amd.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Evgeny Pinchuk Implemented new IOCTL to query the CPU and GPU clock counters. Signed-off-by: Evgeny Pinchuk Signed-off-by: Oded Gabbay --- drivers/gpu/hsa/radeon/kfd_chardev.c | 37 ++++++++++++++++++++++++++++++++++++ include/uapi/linux/kfd_ioctl.h | 9 +++++++++ 2 files changed, 46 insertions(+) diff --git a/drivers/gpu/hsa/radeon/kfd_chardev.c b/drivers/gpu/hsa/radeon/kfd_chardev.c index ddaf357..d6fa980 100644 --- a/drivers/gpu/hsa/radeon/kfd_chardev.c +++ b/drivers/gpu/hsa/radeon/kfd_chardev.c @@ -28,6 +28,7 @@ #include #include #include +#include #include "kfd_priv.h" #include "kfd_scheduler.h" @@ -284,6 +285,38 @@ out: return err; } +static long +kfd_ioctl_get_clock_counters(struct file *filep, struct kfd_process *p, void __user *arg) +{ + struct kfd_ioctl_get_clock_counters_args args; + struct kfd_dev *dev; + struct timespec time; + + if (copy_from_user(&args, arg, sizeof(args))) + return -EFAULT; + + dev = radeon_kfd_device_by_id(args.gpu_id); + if (dev == NULL) + return -EINVAL; + + /* Reading GPU clock counter from KGD */ + args.gpu_clock_counter = kfd2kgd->get_gpu_clock_counter(dev->kgd); + + /* No access to rdtsc. Using raw monotonic time */ + getrawmonotonic(&time); + args.cpu_clock_counter = time.tv_nsec; + + get_monotonic_boottime(&time); + args.system_clock_counter = time.tv_nsec; + + /* Since the counter is in nano-seconds we use 1GHz frequency */ + args.system_clock_freq = 1000000000; + + if (copy_to_user(arg, &args, sizeof(args))) + return -EFAULT; + + return 0; +} static long kfd_ioctl(struct file *filep, unsigned int cmd, unsigned long arg) @@ -312,6 +345,10 @@ kfd_ioctl(struct file *filep, unsigned int cmd, unsigned long arg) err = kfd_ioctl_set_memory_policy(filep, process, (void __user *)arg); break; + case KFD_IOC_GET_CLOCK_COUNTERS: + err = kfd_ioctl_get_clock_counters(filep, process, (void __user *)arg); + break; + default: dev_err(kfd_device, "unknown ioctl cmd 0x%x, arg 0x%lx)\n", diff --git a/include/uapi/linux/kfd_ioctl.h b/include/uapi/linux/kfd_ioctl.h index 928e628..5b9517e 100644 --- a/include/uapi/linux/kfd_ioctl.h +++ b/include/uapi/linux/kfd_ioctl.h @@ -70,12 +70,21 @@ struct kfd_ioctl_set_memory_policy_args { uint64_t alternate_aperture_size; /* to KFD */ }; +struct kfd_ioctl_get_clock_counters_args { + uint32_t gpu_id; /* to KFD */ + uint64_t gpu_clock_counter; /* from KFD */ + uint64_t cpu_clock_counter; /* from KFD */ + uint64_t system_clock_counter; /* from KFD */ + uint64_t system_clock_freq; /* from KFD */ +}; + #define KFD_IOC_MAGIC 'K' #define KFD_IOC_GET_VERSION _IOR(KFD_IOC_MAGIC, 1, struct kfd_ioctl_get_version_args) #define KFD_IOC_CREATE_QUEUE _IOWR(KFD_IOC_MAGIC, 2, struct kfd_ioctl_create_queue_args) #define KFD_IOC_DESTROY_QUEUE _IOWR(KFD_IOC_MAGIC, 3, struct kfd_ioctl_destroy_queue_args) #define KFD_IOC_SET_MEMORY_POLICY _IOW(KFD_IOC_MAGIC, 4, struct kfd_ioctl_set_memory_policy_args) +#define KFD_IOC_GET_CLOCK_COUNTERS _IOWR(KFD_IOC_MAGIC, 5, struct kfd_ioctl_get_clock_counters_args) #pragma pack(pop) -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/