From mboxrd@z Thu Jan 1 00:00:00 1970 From: Oded Gabbay 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> References: <1405029279-6894-1-git-send-email-oded.gabbay@amd.com> Return-path: In-Reply-To: <1405029279-6894-1-git-send-email-oded.gabbay-5C7GfCeVMHo@public.gmane.org> Sender: linux-api-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: David Airlie , Alex Deucher , Jerome Glisse Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org, John Bridgman , Andrew Lewycky , Joerg Roedel , Evgeny Pinchuk , Oded Gabbay , Ben Goz , Alexey Skidanov , linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-api@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