The AMDGPU_SCHED_OP_PROCESS_PRIORITY_OVERRIDE ioctls are used to set the
priority of a different process in the current system.
When a request is dropped, the process's contexts will be
restored to the priority specified at context creation time.
A request can be dropped by setting the override priority to
AMDGPU_CTX_PRIORITY_UNSET.
An fd is used to identify the remote process. This is simpler than
passing a pid number, which is vulnerable to re-use, etc.
This functionality is limited to DRM_MASTER since abuse of this
interface can have a negative impact on the system's performance.
v2: removed unused output structure
v3: change refcounted interface for a regular set operation
Signed-off-by: Andres Rodriguez <andresx7 at gmail.com>
---
drivers/gpu/drm/amd/amdgpu/Makefile | 2 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c | 21 +-----
drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 2 +
drivers/gpu/drm/amd/amdgpu/amdgpu_sched.c | 109 ++++++++++++++++++++++++++++++
drivers/gpu/drm/amd/amdgpu/amdgpu_sched.h | 34 ++++++++++
include/uapi/drm/amdgpu_drm.h | 17 +++++
6 files changed, 164 insertions(+), 21 deletions(-)
create mode 100644 drivers/gpu/drm/amd/amdgpu/amdgpu_sched.c
create mode 100644 drivers/gpu/drm/amd/amdgpu/amdgpu_sched.h
diff --git a/drivers/gpu/drm/amd/amdgpu/Makefile b/drivers/gpu/drm/amd/amdgpu/Makefile
index faea634..f039d88 100644
--- a/drivers/gpu/drm/amd/amdgpu/Makefile
+++ b/drivers/gpu/drm/amd/amdgpu/Makefile
@@ -25,7 +25,7 @@ amdgpu-y += amdgpu_device.o amdgpu_kms.o \
amdgpu_prime.o amdgpu_vm.o amdgpu_ib.o amdgpu_pll.o \
amdgpu_ucode.o amdgpu_bo_list.o amdgpu_ctx.o amdgpu_sync.o \
amdgpu_gtt_mgr.o amdgpu_vram_mgr.o amdgpu_virt.o amdgpu_atomfirmware.o \
- amdgpu_queue_mgr.o
+ amdgpu_queue_mgr.o amdgpu_sched.o
# add asic specific block
amdgpu-$(CONFIG_DRM_AMDGPU_CIK)+= cik.o cik_ih.o kv_smc.o kv_dpm.o \
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
index bf05180..97aafc2 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
@@ -25,6 +25,7 @@
#include <drm/drmP.h>
#include <drm/drm_auth.h>
#include "amdgpu.h"
+#include "amdgpu_sched.h"
static int amdgpu_ctx_priority_permit(struct drm_file *filp,
enum amd_sched_priority priority)
@@ -220,26 +221,6 @@ static int amdgpu_ctx_query(struct amdgpu_device *adev,
return 0;
}
-static enum amd_sched_priority amdgpu_to_sched_priority(int amdgpu_priority)
-{
- switch (amdgpu_priority) {
- case AMDGPU_CTX_PRIORITY_HIGH_HW:
- return AMD_SCHED_PRIORITY_HIGH_HW;
- case AMDGPU_CTX_PRIORITY_HIGH_SW:
- return AMD_SCHED_PRIORITY_HIGH_SW;
- case AMDGPU_CTX_PRIORITY_NORMAL:
- return AMD_SCHED_PRIORITY_NORMAL;
- case AMDGPU_CTX_PRIORITY_LOW_SW:
- case AMDGPU_CTX_PRIORITY_LOW_HW:
- return AMD_SCHED_PRIORITY_LOW;
- case AMDGPU_CTX_PRIORITY_UNSET:
- return AMD_SCHED_PRIORITY_UNSET;
- default:
- WARN(1, "Invalid context priority %d\n", amdgpu_priority);
- return AMD_SCHED_PRIORITY_INVALID;
- }
-}
-
int amdgpu_ctx_ioctl(struct drm_device *dev, void *data,
struct drm_file *filp)
{
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
index 12497a4..80483ab 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
@@ -28,6 +28,7 @@
#include <drm/drmP.h>
#include "amdgpu.h"
#include <drm/amdgpu_drm.h>
+#include "amdgpu_sched.h"
#include "amdgpu_uvd.h"
#include "amdgpu_vce.h"
@@ -1017,6 +1018,7 @@ const struct drm_ioctl_desc amdgpu_ioctls_kms[] = {
DRM_IOCTL_DEF_DRV(AMDGPU_GEM_CREATE, amdgpu_gem_create_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(AMDGPU_CTX, amdgpu_ctx_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(AMDGPU_VM, amdgpu_vm_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
+ DRM_IOCTL_DEF_DRV(AMDGPU_SCHED, amdgpu_sched_ioctl, DRM_MASTER),
DRM_IOCTL_DEF_DRV(AMDGPU_BO_LIST, amdgpu_bo_list_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
/* KMS */
DRM_IOCTL_DEF_DRV(AMDGPU_GEM_MMAP, amdgpu_gem_mmap_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sched.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_sched.c
new file mode 100644
index 0000000..cd12330
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sched.c
@@ -0,0 +1,109 @@
+/*
+ * Copyright 2017 Valve Corporation
+ *
+ * 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.
+ *
+ * Authors: Andres Rodriguez <andresx7 at gmail.com>
+ */
+
+#include <linux/fdtable.h>
+#include <linux/pid.h>
+#include <drm/amdgpu_drm.h>
+#include "amdgpu.h"
+
+#include "amdgpu_vm.h"
+
+enum amd_sched_priority amdgpu_to_sched_priority(int amdgpu_priority)
+{
+ switch (amdgpu_priority) {
+ case AMDGPU_CTX_PRIORITY_HIGH_HW:
+ return AMD_SCHED_PRIORITY_HIGH_HW;
+ case AMDGPU_CTX_PRIORITY_HIGH_SW:
+ return AMD_SCHED_PRIORITY_HIGH_SW;
+ case AMDGPU_CTX_PRIORITY_NORMAL:
+ return AMD_SCHED_PRIORITY_NORMAL;
+ case AMDGPU_CTX_PRIORITY_LOW_SW:
+ case AMDGPU_CTX_PRIORITY_LOW_HW:
+ return AMD_SCHED_PRIORITY_LOW;
+ case AMDGPU_CTX_PRIORITY_UNSET:
+ return AMD_SCHED_PRIORITY_UNSET;
+ default:
+ WARN(1, "Invalid context priority %d\n", amdgpu_priority);
+ return AMD_SCHED_PRIORITY_INVALID;
+ }
+}
+
+static int amdgpu_sched_process_priority_override(struct amdgpu_device *adev,
+ int fd,
+ enum amd_sched_priority priority)
+{
+ struct file *filp = fcheck(fd);
+ struct drm_file *file;
+ struct pid *pid;
+ struct amdgpu_fpriv *fpriv;
+ struct amdgpu_ctx *ctx;
+ uint32_t id;
+
+ if (!filp)
+ return -EINVAL;
+
+ pid = get_pid(((struct drm_file *)filp->private_data)->pid);
+
+ mutex_lock(&adev->ddev->filelist_mutex);
+ list_for_each_entry(file, &adev->ddev->filelist, lhead) {
+ if (file->pid != pid)
+ continue;
+
+ fpriv = file->driver_priv;
+ idr_for_each_entry(&fpriv->ctx_mgr.ctx_handles, ctx, id)
+ amdgpu_ctx_priority_override(ctx, priority);
+ }
+ mutex_unlock(&adev->ddev->filelist_mutex);
+
+ put_pid(pid);
+
+ return 0;
+}
+
+int amdgpu_sched_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *filp)
+{
+ union drm_amdgpu_sched *args = data;
+ struct amdgpu_device *adev = dev->dev_private;
+ enum amd_sched_priority priority;
+ int r;
+
+ priority = amdgpu_to_sched_priority(args->in.priority);
+ if (args->in.flags || priority == AMD_SCHED_PRIORITY_INVALID)
+ return -EINVAL;
+
+ switch (args->in.op) {
+ case AMDGPU_SCHED_OP_PROCESS_PRIORITY_OVERRIDE:
+ r = amdgpu_sched_process_priority_override(adev,
+ args->in.fd,
+ priority);
+ break;
+ default:
+ DRM_ERROR("Invalid sched op specified: %d\n", args->in.op);
+ r = -EINVAL;
+ break;
+ }
+
+ return r;
+}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sched.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_sched.h
new file mode 100644
index 0000000..b28c067
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sched.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2017 Valve Corporation
+ *
+ * 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.
+ *
+ * Authors: Andres Rodriguez <andresx7 at gmail.com>
+ */
+
+#ifndef __AMDGPU_SCHED_H__
+#define __AMDGPU_SCHED_H__
+
+#include <drm/drmP.h>
+
+enum amd_sched_priority amdgpu_to_sched_priority(int amdgpu_priority);
+int amdgpu_sched_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *filp);
+
+#endif // __AMDGPU_SCHED_H__
diff --git a/include/uapi/drm/amdgpu_drm.h b/include/uapi/drm/amdgpu_drm.h
index 53aa9b5..2929bac 100644
--- a/include/uapi/drm/amdgpu_drm.h
+++ b/include/uapi/drm/amdgpu_drm.h
@@ -52,6 +52,7 @@ extern "C" {
#define DRM_AMDGPU_GEM_USERPTR 0x11
#define DRM_AMDGPU_WAIT_FENCES 0x12
#define DRM_AMDGPU_VM 0x13
+#define DRM_AMDGPU_SCHED 0x14
#define DRM_IOCTL_AMDGPU_GEM_CREATE DRM_IOWR(DRM_COMMAND_BASE + DRM_AMDGPU_GEM_CREATE, union drm_amdgpu_gem_create)
#define DRM_IOCTL_AMDGPU_GEM_MMAP DRM_IOWR(DRM_COMMAND_BASE + DRM_AMDGPU_GEM_MMAP, union drm_amdgpu_gem_mmap)
@@ -67,6 +68,7 @@ extern "C" {
#define DRM_IOCTL_AMDGPU_GEM_USERPTR DRM_IOWR(DRM_COMMAND_BASE + DRM_AMDGPU_GEM_USERPTR, struct drm_amdgpu_gem_userptr)
#define DRM_IOCTL_AMDGPU_WAIT_FENCES DRM_IOWR(DRM_COMMAND_BASE + DRM_AMDGPU_WAIT_FENCES, union drm_amdgpu_wait_fences)
#define DRM_IOCTL_AMDGPU_VM DRM_IOWR(DRM_COMMAND_BASE + DRM_AMDGPU_VM, union drm_amdgpu_vm)
+#define DRM_IOCTL_AMDGPU_SCHED DRM_IOW(DRM_COMMAND_BASE + DRM_AMDGPU_SCHED, union drm_amdgpu_sched)
#define AMDGPU_GEM_DOMAIN_CPU 0x1
#define AMDGPU_GEM_DOMAIN_GTT 0x2
@@ -221,6 +223,21 @@ union drm_amdgpu_vm {
struct drm_amdgpu_vm_out out;
};
+/* sched ioctl */
+#define AMDGPU_SCHED_OP_PROCESS_PRIORITY_OVERRIDE 1
+
+struct drm_amdgpu_sched_in {
+ /* AMDGPU_SCHED_OP_* */
+ __u32 op;
+ __u32 fd;
+ __s32 priority;
+ __u32 flags;
+};
+
+union drm_amdgpu_sched {
+ struct drm_amdgpu_sched_in in;
+};
+
/*
* This is not a reliable API and you should expect it to fail for any
* number of reasons and have fallback path that do not use userptr to
--
2.9.3
