[PATCH v4 02/24] drm/amdkfd: add pc sampling support
James Zhu
James.Zhu at amd.com
Tue Feb 6 15:58:58 UTC 2024
From: David Yat Sin <david.yatsin at amd.com>
Add pc sampling functions in amdkfd.
Co-developed-by: James Zhu <James.Zhu at amd.com>
Signed-off-by: James Zhu <James.Zhu at amd.com>
Signed-off-by: David Yat Sin <david.yatsin at amd.com>
---
drivers/gpu/drm/amd/amdkfd/Makefile | 3 +-
drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 45 +++++++++++
drivers/gpu/drm/amd/amdkfd/kfd_pc_sampling.c | 78 ++++++++++++++++++++
drivers/gpu/drm/amd/amdkfd/kfd_pc_sampling.h | 34 +++++++++
drivers/gpu/drm/amd/amdkfd/kfd_priv.h | 13 ++++
5 files changed, 172 insertions(+), 1 deletion(-)
create mode 100644 drivers/gpu/drm/amd/amdkfd/kfd_pc_sampling.c
create mode 100644 drivers/gpu/drm/amd/amdkfd/kfd_pc_sampling.h
diff --git a/drivers/gpu/drm/amd/amdkfd/Makefile b/drivers/gpu/drm/amd/amdkfd/Makefile
index a5ae7bcf44eb..790fd028a681 100644
--- a/drivers/gpu/drm/amd/amdkfd/Makefile
+++ b/drivers/gpu/drm/amd/amdkfd/Makefile
@@ -57,7 +57,8 @@ AMDKFD_FILES := $(AMDKFD_PATH)/kfd_module.o \
$(AMDKFD_PATH)/kfd_int_process_v11.o \
$(AMDKFD_PATH)/kfd_smi_events.o \
$(AMDKFD_PATH)/kfd_crat.o \
- $(AMDKFD_PATH)/kfd_debug.o
+ $(AMDKFD_PATH)/kfd_debug.o \
+ $(AMDKFD_PATH)/kfd_pc_sampling.o
ifneq ($(CONFIG_DEBUG_FS),)
AMDKFD_FILES += $(AMDKFD_PATH)/kfd_debugfs.o
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
index 80e90fdef291..d9cac97c54c0 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
@@ -41,6 +41,7 @@
#include "kfd_priv.h"
#include "kfd_device_queue_manager.h"
#include "kfd_svm.h"
+#include "kfd_pc_sampling.h"
#include "amdgpu_amdkfd.h"
#include "kfd_smi_events.h"
#include "amdgpu_dma_buf.h"
@@ -1745,6 +1746,39 @@ static int kfd_ioctl_svm(struct file *filep, struct kfd_process *p, void *data)
}
#endif
+static int kfd_ioctl_pc_sample(struct file *filep,
+ struct kfd_process *p, void __user *data)
+{
+ struct kfd_ioctl_pc_sample_args *args = data;
+ struct kfd_process_device *pdd;
+ int ret = 0;
+
+ if (sched_policy == KFD_SCHED_POLICY_NO_HWS) {
+ pr_err("PC Sampling does not support sched_policy %i", sched_policy);
+ return -EINVAL;
+ }
+
+ mutex_lock(&p->mutex);
+ pdd = kfd_process_device_data_by_id(p, args->gpu_id);
+
+ if (!pdd) {
+ pr_debug("could not find gpu id 0x%x.", args->gpu_id);
+ ret = -EINVAL;
+ } else if (args->op == KFD_IOCTL_PCS_OP_START) {
+ pdd = kfd_bind_process_to_device(pdd->dev, p);
+ if (IS_ERR(pdd)) {
+ pr_debug("failed to bind process %p with gpu id 0x%x", p, args->gpu_id);
+ ret = -ESRCH;
+ }
+ }
+
+ if (!ret)
+ ret = kfd_pc_sample(pdd, args);
+ mutex_unlock(&p->mutex);
+
+ return ret;
+}
+
static int criu_checkpoint_process(struct kfd_process *p,
uint8_t __user *user_priv_data,
uint64_t *priv_offset)
@@ -3219,6 +3253,9 @@ static const struct amdkfd_ioctl_desc amdkfd_ioctls[] = {
AMDKFD_IOCTL_DEF(AMDKFD_IOC_DBG_TRAP,
kfd_ioctl_set_debug_trap, 0),
+
+ AMDKFD_IOCTL_DEF(AMDKFD_IOC_PC_SAMPLE,
+ kfd_ioctl_pc_sample, KFD_IOC_FLAG_PERFMON),
};
#define AMDKFD_CORE_IOCTL_COUNT ARRAY_SIZE(amdkfd_ioctls)
@@ -3295,6 +3332,14 @@ static long kfd_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
}
}
+ /* PC Sampling Monitor */
+ if (unlikely(ioctl->flags & KFD_IOC_FLAG_PERFMON)) {
+ if (!capable(CAP_PERFMON) && !capable(CAP_SYS_ADMIN)) {
+ retcode = -EACCES;
+ goto err_i1;
+ }
+ }
+
if (cmd & (IOC_IN | IOC_OUT)) {
if (asize <= sizeof(stack_kdata)) {
kdata = stack_kdata;
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_pc_sampling.c b/drivers/gpu/drm/amd/amdkfd/kfd_pc_sampling.c
new file mode 100644
index 000000000000..a7e78ff42d07
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_pc_sampling.c
@@ -0,0 +1,78 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+/*
+ * Copyright 2023 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "kfd_priv.h"
+#include "amdgpu_amdkfd.h"
+#include "kfd_pc_sampling.h"
+
+static int kfd_pc_sample_query_cap(struct kfd_process_device *pdd,
+ struct kfd_ioctl_pc_sample_args __user *user_args)
+{
+ return -EINVAL;
+}
+
+static int kfd_pc_sample_start(struct kfd_process_device *pdd)
+{
+ return -EINVAL;
+}
+
+static int kfd_pc_sample_stop(struct kfd_process_device *pdd)
+{
+ return -EINVAL;
+
+}
+
+static int kfd_pc_sample_create(struct kfd_process_device *pdd,
+ struct kfd_ioctl_pc_sample_args __user *user_args)
+{
+ return -EINVAL;
+}
+
+static int kfd_pc_sample_destroy(struct kfd_process_device *pdd, uint32_t trace_id)
+{
+ return -EINVAL;
+
+}
+
+int kfd_pc_sample(struct kfd_process_device *pdd,
+ struct kfd_ioctl_pc_sample_args __user *args)
+{
+ switch (args->op) {
+ case KFD_IOCTL_PCS_OP_QUERY_CAPABILITIES:
+ return kfd_pc_sample_query_cap(pdd, args);
+
+ case KFD_IOCTL_PCS_OP_CREATE:
+ return kfd_pc_sample_create(pdd, args);
+
+ case KFD_IOCTL_PCS_OP_DESTROY:
+ return kfd_pc_sample_destroy(pdd, args->trace_id);
+
+ case KFD_IOCTL_PCS_OP_START:
+ return kfd_pc_sample_start(pdd);
+
+ case KFD_IOCTL_PCS_OP_STOP:
+ return kfd_pc_sample_stop(pdd);
+ }
+
+ return -EINVAL;
+}
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_pc_sampling.h b/drivers/gpu/drm/amd/amdkfd/kfd_pc_sampling.h
new file mode 100644
index 000000000000..4eeded4ea5b6
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_pc_sampling.h
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: GPL-2.0 OR MIT */
+/*
+ * Copyright 2023 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+#ifndef KFD_PC_SAMPLING_H_
+#define KFD_PC_SAMPLING_H_
+
+#include "amdgpu.h"
+#include "kfd_priv.h"
+
+int kfd_pc_sample(struct kfd_process_device *pdd,
+ struct kfd_ioctl_pc_sample_args __user *args);
+
+#endif /* KFD_PC_SAMPLING_H_ */
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
index 677281c0793e..ae9a41670909 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
@@ -144,6 +144,19 @@ enum kfd_ioctl_flags {
* we also allow ioctls with SYS_ADMIN capability.
*/
KFD_IOC_FLAG_CHECKPOINT_RESTORE = BIT(0),
+
+ /*
+ * @KFD_IOC_FLAG_PERFMON:
+ * Performance monitoring feature, GPU performance monitoring can allow users
+ * to gather some information about other processes. PC sampling can allow
+ * users to infer information about wavefronts from other processes that are
+ * running on the same CUs, such as which execution units they are using. As
+ * such, this type of performance monitoring should be protected and only
+ * available to users with sufficient capabilities: either CAP_PERFMON, or,
+ * for backwards compatibility, CAP_SYS_ADMIN.
+ */
+
+ KFD_IOC_FLAG_PERFMON = BIT(1),
};
/*
* Kernel module parameter to specify maximum number of supported queues per
--
2.25.1
More information about the amd-gfx
mailing list