[3/3] drm/amdgpu: add FENCE_TO_HANDLE ioctl that returns syncobj or sync_file

Submitted by Marek Olšák on Sept. 12, 2017, 8:42 p.m.

Details

Message ID 1505248934-1819-3-git-send-email-maraeo@gmail.com
State New
Headers show
Series "Series without cover letter" ( rev: 2 1 ) in AMD X.Org drivers

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Commit Message

Marek Olšák Sept. 12, 2017, 8:42 p.m.
From: Marek Olšák <marek.olsak@amd.com>

for being able to convert an amdgpu fence into one of the handles.
Mesa will use this.

Signed-off-by: Marek Olšák <marek.olsak@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu.h     |  2 ++
 drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c  | 61 +++++++++++++++++++++++++++++++++
 drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c |  3 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c |  1 +
 include/uapi/drm/amdgpu_drm.h           | 16 +++++++++
 5 files changed, 82 insertions(+), 1 deletion(-)

Patch hide | download patch | download mbox

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index b5c8b90..c15fa93 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -1308,6 +1308,8 @@  int amdgpu_gem_va_ioctl(struct drm_device *dev, void *data,
 int amdgpu_gem_op_ioctl(struct drm_device *dev, void *data,
 			struct drm_file *filp);
 int amdgpu_cs_ioctl(struct drm_device *dev, void *data, struct drm_file *filp);
+int amdgpu_cs_fence_to_handle_ioctl(struct drm_device *dev, void *data,
+				    struct drm_file *filp);
 int amdgpu_cs_wait_ioctl(struct drm_device *dev, void *data, struct drm_file *filp);
 int amdgpu_cs_wait_fences_ioctl(struct drm_device *dev, void *data,
 				struct drm_file *filp);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
index 7cb8a59..6dd719c 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
@@ -25,6 +25,7 @@ 
  *    Jerome Glisse <glisse@freedesktop.org>
  */
 #include <linux/pagemap.h>
+#include <linux/sync_file.h>
 #include <drm/drmP.h>
 #include <drm/amdgpu_drm.h>
 #include <drm/drm_syncobj.h>
@@ -1311,6 +1312,66 @@  static struct dma_fence *amdgpu_cs_get_fence(struct amdgpu_device *adev,
 	return fence;
 }
 
+int amdgpu_cs_fence_to_handle_ioctl(struct drm_device *dev, void *data,
+				    struct drm_file *filp)
+{
+	struct amdgpu_device *adev = dev->dev_private;
+	struct amdgpu_fpriv *fpriv = filp->driver_priv;
+	union drm_amdgpu_fence_to_handle *info = data;
+	struct dma_fence *fence;
+	struct drm_syncobj *syncobj;
+	struct sync_file *sync_file;
+	int fd, r;
+
+	if (amdgpu_kms_vram_lost(adev, fpriv))
+		return -ENODEV;
+
+	fence = amdgpu_cs_get_fence(adev, filp, &info->in.fence);
+	if (IS_ERR(fence))
+		return PTR_ERR(fence);
+
+	switch (info->in.what) {
+	case AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ:
+		r = drm_syncobj_create(&syncobj, 0, fence);
+		dma_fence_put(fence);
+		if (r)
+			return r;
+		r = drm_syncobj_get_handle(filp, syncobj, &info->out.handle);
+		drm_syncobj_put(syncobj);
+		return r;
+
+	case AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ_FD:
+		r = drm_syncobj_create(&syncobj, 0, fence);
+		dma_fence_put(fence);
+		if (r)
+			return r;
+		r = drm_syncobj_get_fd(syncobj, (int*)&info->out.handle);
+		drm_syncobj_put(syncobj);
+		return r;
+
+	case AMDGPU_FENCE_TO_HANDLE_GET_SYNC_FILE_FD:
+		fd = get_unused_fd_flags(O_CLOEXEC);
+		if (fd < 0) {
+			dma_fence_put(fence);
+			return fd;
+		}
+
+		sync_file = sync_file_create(fence);
+		dma_fence_put(fence);
+		if (!sync_file) {
+			put_unused_fd(fd);
+			return -ENOMEM;
+		}
+
+		fd_install(fd, sync_file->file);
+		info->out.handle = fd;
+		return 0;
+
+	default:
+		return -EINVAL;
+	}
+}
+
 /**
  * amdgpu_cs_wait_all_fence - wait on all fences to signal
  *
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index d01aca6..1e38411 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -70,9 +70,10 @@ 
  * - 3.18.0 - Export gpu always on cu bitmap
  * - 3.19.0 - Add support for UVD MJPEG decode
  * - 3.20.0 - Add support for local BOs
+ * - 3.21.0 - Add DRM_AMDGPU_FENCE_TO_HANDLE ioctl
  */
 #define KMS_DRIVER_MAJOR	3
-#define KMS_DRIVER_MINOR	20
+#define KMS_DRIVER_MINOR	21
 #define KMS_DRIVER_PATCHLEVEL	0
 
 int amdgpu_vram_limit = 0;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
index d31777b..b09d315 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
@@ -1021,6 +1021,7 @@  const struct drm_ioctl_desc amdgpu_ioctls_kms[] = {
 	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_BO_LIST, amdgpu_bo_list_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
+	DRM_IOCTL_DEF_DRV(AMDGPU_FENCE_TO_HANDLE, amdgpu_cs_fence_to_handle_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
 	/* KMS */
 	DRM_IOCTL_DEF_DRV(AMDGPU_GEM_MMAP, amdgpu_gem_mmap_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
 	DRM_IOCTL_DEF_DRV(AMDGPU_GEM_WAIT_IDLE, amdgpu_gem_wait_idle_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
diff --git a/include/uapi/drm/amdgpu_drm.h b/include/uapi/drm/amdgpu_drm.h
index 9f5bd97..ec57cd0 100644
--- a/include/uapi/drm/amdgpu_drm.h
+++ b/include/uapi/drm/amdgpu_drm.h
@@ -53,6 +53,7 @@  extern "C" {
 #define DRM_AMDGPU_WAIT_FENCES		0x12
 #define DRM_AMDGPU_VM			0x13
 #define DRM_AMDGPU_FREESYNC	        0x14
+#define DRM_AMDGPU_FENCE_TO_HANDLE	0x15
 
 #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)
@@ -69,6 +70,7 @@  extern "C" {
 #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_FREESYNC	DRM_IOWR(DRM_COMMAND_BASE + DRM_AMDGPU_FREESYNC, struct drm_amdgpu_freesync)
+#define DRM_IOCTL_AMDGPU_FENCE_TO_HANDLE DRM_IOWR(DRM_COMMAND_BASE + DRM_AMDGPU_FENCE_TO_HANDLE, union drm_amdgpu_fence_to_handle)
 
 #define AMDGPU_GEM_DOMAIN_CPU		0x1
 #define AMDGPU_GEM_DOMAIN_GTT		0x2
@@ -517,6 +519,20 @@  struct drm_amdgpu_cs_chunk_sem {
 	__u32 handle;
 };
 
+#define AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ	0
+#define AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ_FD	1
+#define AMDGPU_FENCE_TO_HANDLE_GET_SYNC_FILE_FD	2
+
+union drm_amdgpu_fence_to_handle {
+	struct {
+		struct drm_amdgpu_fence fence;
+		__u32 what;
+	} in;
+	struct {
+		__u32 handle;
+	} out;
+};
+
 struct drm_amdgpu_cs_chunk_data {
 	union {
 		struct drm_amdgpu_cs_chunk_ib		ib_data;

Comments

Hi Marek,

You're doing same things with me, see my "introduce syncfile as fence 
reuturn" patch set, which makes things more simple, we just need to 
directly return syncfile fd to UMD when CS, then the fence UMD get will 
be always syncfile fd, UMD don't need to construct 
ip_type/ip_instance/ctx_id/ring any more, which also can pass to 
dependency and syncobj as well.

Regards,
David Zhou
On 2017年09月13日 04:42, Marek Olšák wrote:
> From: Marek Olšák <marek.olsak@amd.com>
>
> for being able to convert an amdgpu fence into one of the handles.
> Mesa will use this.
>
> Signed-off-by: Marek Olšák <marek.olsak@amd.com>
> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu.h     |  2 ++
>   drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c  | 61 +++++++++++++++++++++++++++++++++
>   drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c |  3 +-
>   drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c |  1 +
>   include/uapi/drm/amdgpu_drm.h           | 16 +++++++++
>   5 files changed, 82 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> index b5c8b90..c15fa93 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> @@ -1308,6 +1308,8 @@ int amdgpu_gem_va_ioctl(struct drm_device *dev, void *data,
>   int amdgpu_gem_op_ioctl(struct drm_device *dev, void *data,
>   			struct drm_file *filp);
>   int amdgpu_cs_ioctl(struct drm_device *dev, void *data, struct drm_file *filp);
> +int amdgpu_cs_fence_to_handle_ioctl(struct drm_device *dev, void *data,
> +				    struct drm_file *filp);
>   int amdgpu_cs_wait_ioctl(struct drm_device *dev, void *data, struct drm_file *filp);
>   int amdgpu_cs_wait_fences_ioctl(struct drm_device *dev, void *data,
>   				struct drm_file *filp);
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> index 7cb8a59..6dd719c 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> @@ -25,6 +25,7 @@
>    *    Jerome Glisse <glisse@freedesktop.org>
>    */
>   #include <linux/pagemap.h>
> +#include <linux/sync_file.h>
>   #include <drm/drmP.h>
>   #include <drm/amdgpu_drm.h>
>   #include <drm/drm_syncobj.h>
> @@ -1311,6 +1312,66 @@ static struct dma_fence *amdgpu_cs_get_fence(struct amdgpu_device *adev,
>   	return fence;
>   }
>   
> +int amdgpu_cs_fence_to_handle_ioctl(struct drm_device *dev, void *data,
> +				    struct drm_file *filp)
> +{
> +	struct amdgpu_device *adev = dev->dev_private;
> +	struct amdgpu_fpriv *fpriv = filp->driver_priv;
> +	union drm_amdgpu_fence_to_handle *info = data;
> +	struct dma_fence *fence;
> +	struct drm_syncobj *syncobj;
> +	struct sync_file *sync_file;
> +	int fd, r;
> +
> +	if (amdgpu_kms_vram_lost(adev, fpriv))
> +		return -ENODEV;
> +
> +	fence = amdgpu_cs_get_fence(adev, filp, &info->in.fence);
> +	if (IS_ERR(fence))
> +		return PTR_ERR(fence);
> +
> +	switch (info->in.what) {
> +	case AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ:
> +		r = drm_syncobj_create(&syncobj, 0, fence);
> +		dma_fence_put(fence);
> +		if (r)
> +			return r;
> +		r = drm_syncobj_get_handle(filp, syncobj, &info->out.handle);
> +		drm_syncobj_put(syncobj);
> +		return r;
> +
> +	case AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ_FD:
> +		r = drm_syncobj_create(&syncobj, 0, fence);
> +		dma_fence_put(fence);
> +		if (r)
> +			return r;
> +		r = drm_syncobj_get_fd(syncobj, (int*)&info->out.handle);
> +		drm_syncobj_put(syncobj);
> +		return r;
> +
> +	case AMDGPU_FENCE_TO_HANDLE_GET_SYNC_FILE_FD:
> +		fd = get_unused_fd_flags(O_CLOEXEC);
> +		if (fd < 0) {
> +			dma_fence_put(fence);
> +			return fd;
> +		}
> +
> +		sync_file = sync_file_create(fence);
> +		dma_fence_put(fence);
> +		if (!sync_file) {
> +			put_unused_fd(fd);
> +			return -ENOMEM;
> +		}
> +
> +		fd_install(fd, sync_file->file);
> +		info->out.handle = fd;
> +		return 0;
> +
> +	default:
> +		return -EINVAL;
> +	}
> +}
> +
>   /**
>    * amdgpu_cs_wait_all_fence - wait on all fences to signal
>    *
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> index d01aca6..1e38411 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> @@ -70,9 +70,10 @@
>    * - 3.18.0 - Export gpu always on cu bitmap
>    * - 3.19.0 - Add support for UVD MJPEG decode
>    * - 3.20.0 - Add support for local BOs
> + * - 3.21.0 - Add DRM_AMDGPU_FENCE_TO_HANDLE ioctl
>    */
>   #define KMS_DRIVER_MAJOR	3
> -#define KMS_DRIVER_MINOR	20
> +#define KMS_DRIVER_MINOR	21
>   #define KMS_DRIVER_PATCHLEVEL	0
>   
>   int amdgpu_vram_limit = 0;
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> index d31777b..b09d315 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> @@ -1021,6 +1021,7 @@ const struct drm_ioctl_desc amdgpu_ioctls_kms[] = {
>   	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_BO_LIST, amdgpu_bo_list_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
> +	DRM_IOCTL_DEF_DRV(AMDGPU_FENCE_TO_HANDLE, amdgpu_cs_fence_to_handle_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
>   	/* KMS */
>   	DRM_IOCTL_DEF_DRV(AMDGPU_GEM_MMAP, amdgpu_gem_mmap_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
>   	DRM_IOCTL_DEF_DRV(AMDGPU_GEM_WAIT_IDLE, amdgpu_gem_wait_idle_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
> diff --git a/include/uapi/drm/amdgpu_drm.h b/include/uapi/drm/amdgpu_drm.h
> index 9f5bd97..ec57cd0 100644
> --- a/include/uapi/drm/amdgpu_drm.h
> +++ b/include/uapi/drm/amdgpu_drm.h
> @@ -53,6 +53,7 @@ extern "C" {
>   #define DRM_AMDGPU_WAIT_FENCES		0x12
>   #define DRM_AMDGPU_VM			0x13
>   #define DRM_AMDGPU_FREESYNC	        0x14
> +#define DRM_AMDGPU_FENCE_TO_HANDLE	0x15
>   
>   #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)
> @@ -69,6 +70,7 @@ extern "C" {
>   #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_FREESYNC	DRM_IOWR(DRM_COMMAND_BASE + DRM_AMDGPU_FREESYNC, struct drm_amdgpu_freesync)
> +#define DRM_IOCTL_AMDGPU_FENCE_TO_HANDLE DRM_IOWR(DRM_COMMAND_BASE + DRM_AMDGPU_FENCE_TO_HANDLE, union drm_amdgpu_fence_to_handle)
>   
>   #define AMDGPU_GEM_DOMAIN_CPU		0x1
>   #define AMDGPU_GEM_DOMAIN_GTT		0x2
> @@ -517,6 +519,20 @@ struct drm_amdgpu_cs_chunk_sem {
>   	__u32 handle;
>   };
>   
> +#define AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ	0
> +#define AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ_FD	1
> +#define AMDGPU_FENCE_TO_HANDLE_GET_SYNC_FILE_FD	2
> +
> +union drm_amdgpu_fence_to_handle {
> +	struct {
> +		struct drm_amdgpu_fence fence;
> +		__u32 what;
> +	} in;
> +	struct {
> +		__u32 handle;
> +	} out;
> +};
> +
>   struct drm_amdgpu_cs_chunk_data {
>   	union {
>   		struct drm_amdgpu_cs_chunk_ib		ib_data;
Hi guys,

Mareks IOCTL proposal looks really good to me.

Please note that we already have sync_obj support for the CS IOCTL in 
the 4.13 branch and this work is based on top of that.

> UMD don't need to construct ip_type/ip_instance/ctx_id/ring
Well the UMD does want to construct ip_type/ip_instance/ctx_id/ring and 
use for the simple reason that it allows more flexibility than 
sync_obj/sync_file.

Thinking more about this I'm pretty sure we want to do something similar 
for VM map/unmap operations as well.

Regards,
Christian.

Am 13.09.2017 um 05:03 schrieb zhoucm1:
> Hi Marek,
>
> You're doing same things with me, see my "introduce syncfile as fence 
> reuturn" patch set, which makes things more simple, we just need to 
> directly return syncfile fd to UMD when CS, then the fence UMD get 
> will be always syncfile fd, UMD don't need to construct 
> ip_type/ip_instance/ctx_id/ring any more, which also can pass to 
> dependency and syncobj as well.
>
> Regards,
> David Zhou
> On 2017年09月13日 04:42, Marek Olšák wrote:
>> From: Marek Olšák <marek.olsak@amd.com>
>>
>> for being able to convert an amdgpu fence into one of the handles.
>> Mesa will use this.
>>
>> Signed-off-by: Marek Olšák <marek.olsak@amd.com>
>> ---
>>   drivers/gpu/drm/amd/amdgpu/amdgpu.h     |  2 ++
>>   drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c  | 61 
>> +++++++++++++++++++++++++++++++++
>>   drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c |  3 +-
>>   drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c |  1 +
>>   include/uapi/drm/amdgpu_drm.h           | 16 +++++++++
>>   5 files changed, 82 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h 
>> b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>> index b5c8b90..c15fa93 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>> @@ -1308,6 +1308,8 @@ int amdgpu_gem_va_ioctl(struct drm_device *dev, 
>> void *data,
>>   int amdgpu_gem_op_ioctl(struct drm_device *dev, void *data,
>>               struct drm_file *filp);
>>   int amdgpu_cs_ioctl(struct drm_device *dev, void *data, struct 
>> drm_file *filp);
>> +int amdgpu_cs_fence_to_handle_ioctl(struct drm_device *dev, void *data,
>> +                    struct drm_file *filp);
>>   int amdgpu_cs_wait_ioctl(struct drm_device *dev, void *data, struct 
>> drm_file *filp);
>>   int amdgpu_cs_wait_fences_ioctl(struct drm_device *dev, void *data,
>>                   struct drm_file *filp);
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c 
>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
>> index 7cb8a59..6dd719c 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
>> @@ -25,6 +25,7 @@
>>    *    Jerome Glisse <glisse@freedesktop.org>
>>    */
>>   #include <linux/pagemap.h>
>> +#include <linux/sync_file.h>
>>   #include <drm/drmP.h>
>>   #include <drm/amdgpu_drm.h>
>>   #include <drm/drm_syncobj.h>
>> @@ -1311,6 +1312,66 @@ static struct dma_fence 
>> *amdgpu_cs_get_fence(struct amdgpu_device *adev,
>>       return fence;
>>   }
>>   +int amdgpu_cs_fence_to_handle_ioctl(struct drm_device *dev, void 
>> *data,
>> +                    struct drm_file *filp)
>> +{
>> +    struct amdgpu_device *adev = dev->dev_private;
>> +    struct amdgpu_fpriv *fpriv = filp->driver_priv;
>> +    union drm_amdgpu_fence_to_handle *info = data;
>> +    struct dma_fence *fence;
>> +    struct drm_syncobj *syncobj;
>> +    struct sync_file *sync_file;
>> +    int fd, r;
>> +
>> +    if (amdgpu_kms_vram_lost(adev, fpriv))
>> +        return -ENODEV;
>> +
>> +    fence = amdgpu_cs_get_fence(adev, filp, &info->in.fence);
>> +    if (IS_ERR(fence))
>> +        return PTR_ERR(fence);
>> +
>> +    switch (info->in.what) {
>> +    case AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ:
>> +        r = drm_syncobj_create(&syncobj, 0, fence);
>> +        dma_fence_put(fence);
>> +        if (r)
>> +            return r;
>> +        r = drm_syncobj_get_handle(filp, syncobj, &info->out.handle);
>> +        drm_syncobj_put(syncobj);
>> +        return r;
>> +
>> +    case AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ_FD:
>> +        r = drm_syncobj_create(&syncobj, 0, fence);
>> +        dma_fence_put(fence);
>> +        if (r)
>> +            return r;
>> +        r = drm_syncobj_get_fd(syncobj, (int*)&info->out.handle);
>> +        drm_syncobj_put(syncobj);
>> +        return r;
>> +
>> +    case AMDGPU_FENCE_TO_HANDLE_GET_SYNC_FILE_FD:
>> +        fd = get_unused_fd_flags(O_CLOEXEC);
>> +        if (fd < 0) {
>> +            dma_fence_put(fence);
>> +            return fd;
>> +        }
>> +
>> +        sync_file = sync_file_create(fence);
>> +        dma_fence_put(fence);
>> +        if (!sync_file) {
>> +            put_unused_fd(fd);
>> +            return -ENOMEM;
>> +        }
>> +
>> +        fd_install(fd, sync_file->file);
>> +        info->out.handle = fd;
>> +        return 0;
>> +
>> +    default:
>> +        return -EINVAL;
>> +    }
>> +}
>> +
>>   /**
>>    * amdgpu_cs_wait_all_fence - wait on all fences to signal
>>    *
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c 
>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
>> index d01aca6..1e38411 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
>> @@ -70,9 +70,10 @@
>>    * - 3.18.0 - Export gpu always on cu bitmap
>>    * - 3.19.0 - Add support for UVD MJPEG decode
>>    * - 3.20.0 - Add support for local BOs
>> + * - 3.21.0 - Add DRM_AMDGPU_FENCE_TO_HANDLE ioctl
>>    */
>>   #define KMS_DRIVER_MAJOR    3
>> -#define KMS_DRIVER_MINOR    20
>> +#define KMS_DRIVER_MINOR    21
>>   #define KMS_DRIVER_PATCHLEVEL    0
>>     int amdgpu_vram_limit = 0;
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c 
>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
>> index d31777b..b09d315 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
>> @@ -1021,6 +1021,7 @@ const struct drm_ioctl_desc amdgpu_ioctls_kms[] 
>> = {
>>       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_BO_LIST, amdgpu_bo_list_ioctl, 
>> DRM_AUTH|DRM_RENDER_ALLOW),
>> +    DRM_IOCTL_DEF_DRV(AMDGPU_FENCE_TO_HANDLE, 
>> amdgpu_cs_fence_to_handle_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
>>       /* KMS */
>>       DRM_IOCTL_DEF_DRV(AMDGPU_GEM_MMAP, amdgpu_gem_mmap_ioctl, 
>> DRM_AUTH|DRM_RENDER_ALLOW),
>>       DRM_IOCTL_DEF_DRV(AMDGPU_GEM_WAIT_IDLE, 
>> amdgpu_gem_wait_idle_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
>> diff --git a/include/uapi/drm/amdgpu_drm.h 
>> b/include/uapi/drm/amdgpu_drm.h
>> index 9f5bd97..ec57cd0 100644
>> --- a/include/uapi/drm/amdgpu_drm.h
>> +++ b/include/uapi/drm/amdgpu_drm.h
>> @@ -53,6 +53,7 @@ extern "C" {
>>   #define DRM_AMDGPU_WAIT_FENCES        0x12
>>   #define DRM_AMDGPU_VM            0x13
>>   #define DRM_AMDGPU_FREESYNC            0x14
>> +#define DRM_AMDGPU_FENCE_TO_HANDLE    0x15
>>     #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)
>> @@ -69,6 +70,7 @@ extern "C" {
>>   #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_FREESYNC    DRM_IOWR(DRM_COMMAND_BASE + 
>> DRM_AMDGPU_FREESYNC, struct drm_amdgpu_freesync)
>> +#define DRM_IOCTL_AMDGPU_FENCE_TO_HANDLE DRM_IOWR(DRM_COMMAND_BASE + 
>> DRM_AMDGPU_FENCE_TO_HANDLE, union drm_amdgpu_fence_to_handle)
>>     #define AMDGPU_GEM_DOMAIN_CPU        0x1
>>   #define AMDGPU_GEM_DOMAIN_GTT        0x2
>> @@ -517,6 +519,20 @@ struct drm_amdgpu_cs_chunk_sem {
>>       __u32 handle;
>>   };
>>   +#define AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ    0
>> +#define AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ_FD    1
>> +#define AMDGPU_FENCE_TO_HANDLE_GET_SYNC_FILE_FD    2
>> +
>> +union drm_amdgpu_fence_to_handle {
>> +    struct {
>> +        struct drm_amdgpu_fence fence;
>> +        __u32 what;
>> +    } in;
>> +    struct {
>> +        __u32 handle;
>> +    } out;
>> +};
>> +
>>   struct drm_amdgpu_cs_chunk_data {
>>       union {
>>           struct drm_amdgpu_cs_chunk_ib        ib_data;
>
> _______________________________________________
> amd-gfx mailing list
> amd-gfx@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
I really very surprise that you prefer to expand sync_obj to get 
syncfile fd!!!

Why not directly generate syncfile fd and use it? Which one is simple is 
so obvious.

Regards,
David Zhou
On 2017年09月13日 14:57, Christian König wrote:
> Hi guys,
>
> Mareks IOCTL proposal looks really good to me.
>
> Please note that we already have sync_obj support for the CS IOCTL in 
> the 4.13 branch and this work is based on top of that.
>
>> UMD don't need to construct ip_type/ip_instance/ctx_id/ring
> Well the UMD does want to construct ip_type/ip_instance/ctx_id/ring 
> and use for the simple reason that it allows more flexibility than 
> sync_obj/sync_file.
>
> Thinking more about this I'm pretty sure we want to do something 
> similar for VM map/unmap operations as well.
>
> Regards,
> Christian.
>
> Am 13.09.2017 um 05:03 schrieb zhoucm1:
>> Hi Marek,
>>
>> You're doing same things with me, see my "introduce syncfile as fence 
>> reuturn" patch set, which makes things more simple, we just need to 
>> directly return syncfile fd to UMD when CS, then the fence UMD get 
>> will be always syncfile fd, UMD don't need to construct 
>> ip_type/ip_instance/ctx_id/ring any more, which also can pass to 
>> dependency and syncobj as well.
>>
>> Regards,
>> David Zhou
>> On 2017年09月13日 04:42, Marek Olšák wrote:
>>> From: Marek Olšák <marek.olsak@amd.com>
>>>
>>> for being able to convert an amdgpu fence into one of the handles.
>>> Mesa will use this.
>>>
>>> Signed-off-by: Marek Olšák <marek.olsak@amd.com>
>>> ---
>>>   drivers/gpu/drm/amd/amdgpu/amdgpu.h     |  2 ++
>>>   drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c  | 61 
>>> +++++++++++++++++++++++++++++++++
>>>   drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c |  3 +-
>>>   drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c |  1 +
>>>   include/uapi/drm/amdgpu_drm.h           | 16 +++++++++
>>>   5 files changed, 82 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h 
>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>>> index b5c8b90..c15fa93 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>>> @@ -1308,6 +1308,8 @@ int amdgpu_gem_va_ioctl(struct drm_device 
>>> *dev, void *data,
>>>   int amdgpu_gem_op_ioctl(struct drm_device *dev, void *data,
>>>               struct drm_file *filp);
>>>   int amdgpu_cs_ioctl(struct drm_device *dev, void *data, struct 
>>> drm_file *filp);
>>> +int amdgpu_cs_fence_to_handle_ioctl(struct drm_device *dev, void 
>>> *data,
>>> +                    struct drm_file *filp);
>>>   int amdgpu_cs_wait_ioctl(struct drm_device *dev, void *data, 
>>> struct drm_file *filp);
>>>   int amdgpu_cs_wait_fences_ioctl(struct drm_device *dev, void *data,
>>>                   struct drm_file *filp);
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c 
>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
>>> index 7cb8a59..6dd719c 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
>>> @@ -25,6 +25,7 @@
>>>    *    Jerome Glisse <glisse@freedesktop.org>
>>>    */
>>>   #include <linux/pagemap.h>
>>> +#include <linux/sync_file.h>
>>>   #include <drm/drmP.h>
>>>   #include <drm/amdgpu_drm.h>
>>>   #include <drm/drm_syncobj.h>
>>> @@ -1311,6 +1312,66 @@ static struct dma_fence 
>>> *amdgpu_cs_get_fence(struct amdgpu_device *adev,
>>>       return fence;
>>>   }
>>>   +int amdgpu_cs_fence_to_handle_ioctl(struct drm_device *dev, void 
>>> *data,
>>> +                    struct drm_file *filp)
>>> +{
>>> +    struct amdgpu_device *adev = dev->dev_private;
>>> +    struct amdgpu_fpriv *fpriv = filp->driver_priv;
>>> +    union drm_amdgpu_fence_to_handle *info = data;
>>> +    struct dma_fence *fence;
>>> +    struct drm_syncobj *syncobj;
>>> +    struct sync_file *sync_file;
>>> +    int fd, r;
>>> +
>>> +    if (amdgpu_kms_vram_lost(adev, fpriv))
>>> +        return -ENODEV;
>>> +
>>> +    fence = amdgpu_cs_get_fence(adev, filp, &info->in.fence);
>>> +    if (IS_ERR(fence))
>>> +        return PTR_ERR(fence);
>>> +
>>> +    switch (info->in.what) {
>>> +    case AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ:
>>> +        r = drm_syncobj_create(&syncobj, 0, fence);
>>> +        dma_fence_put(fence);
>>> +        if (r)
>>> +            return r;
>>> +        r = drm_syncobj_get_handle(filp, syncobj, &info->out.handle);
>>> +        drm_syncobj_put(syncobj);
>>> +        return r;
>>> +
>>> +    case AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ_FD:
>>> +        r = drm_syncobj_create(&syncobj, 0, fence);
>>> +        dma_fence_put(fence);
>>> +        if (r)
>>> +            return r;
>>> +        r = drm_syncobj_get_fd(syncobj, (int*)&info->out.handle);
>>> +        drm_syncobj_put(syncobj);
>>> +        return r;
>>> +
>>> +    case AMDGPU_FENCE_TO_HANDLE_GET_SYNC_FILE_FD:
>>> +        fd = get_unused_fd_flags(O_CLOEXEC);
>>> +        if (fd < 0) {
>>> +            dma_fence_put(fence);
>>> +            return fd;
>>> +        }
>>> +
>>> +        sync_file = sync_file_create(fence);
>>> +        dma_fence_put(fence);
>>> +        if (!sync_file) {
>>> +            put_unused_fd(fd);
>>> +            return -ENOMEM;
>>> +        }
>>> +
>>> +        fd_install(fd, sync_file->file);
>>> +        info->out.handle = fd;
>>> +        return 0;
>>> +
>>> +    default:
>>> +        return -EINVAL;
>>> +    }
>>> +}
>>> +
>>>   /**
>>>    * amdgpu_cs_wait_all_fence - wait on all fences to signal
>>>    *
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c 
>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
>>> index d01aca6..1e38411 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
>>> @@ -70,9 +70,10 @@
>>>    * - 3.18.0 - Export gpu always on cu bitmap
>>>    * - 3.19.0 - Add support for UVD MJPEG decode
>>>    * - 3.20.0 - Add support for local BOs
>>> + * - 3.21.0 - Add DRM_AMDGPU_FENCE_TO_HANDLE ioctl
>>>    */
>>>   #define KMS_DRIVER_MAJOR    3
>>> -#define KMS_DRIVER_MINOR    20
>>> +#define KMS_DRIVER_MINOR    21
>>>   #define KMS_DRIVER_PATCHLEVEL    0
>>>     int amdgpu_vram_limit = 0;
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c 
>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
>>> index d31777b..b09d315 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
>>> @@ -1021,6 +1021,7 @@ const struct drm_ioctl_desc 
>>> amdgpu_ioctls_kms[] = {
>>>       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_BO_LIST, amdgpu_bo_list_ioctl, 
>>> DRM_AUTH|DRM_RENDER_ALLOW),
>>> +    DRM_IOCTL_DEF_DRV(AMDGPU_FENCE_TO_HANDLE, 
>>> amdgpu_cs_fence_to_handle_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
>>>       /* KMS */
>>>       DRM_IOCTL_DEF_DRV(AMDGPU_GEM_MMAP, amdgpu_gem_mmap_ioctl, 
>>> DRM_AUTH|DRM_RENDER_ALLOW),
>>>       DRM_IOCTL_DEF_DRV(AMDGPU_GEM_WAIT_IDLE, 
>>> amdgpu_gem_wait_idle_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
>>> diff --git a/include/uapi/drm/amdgpu_drm.h 
>>> b/include/uapi/drm/amdgpu_drm.h
>>> index 9f5bd97..ec57cd0 100644
>>> --- a/include/uapi/drm/amdgpu_drm.h
>>> +++ b/include/uapi/drm/amdgpu_drm.h
>>> @@ -53,6 +53,7 @@ extern "C" {
>>>   #define DRM_AMDGPU_WAIT_FENCES        0x12
>>>   #define DRM_AMDGPU_VM            0x13
>>>   #define DRM_AMDGPU_FREESYNC            0x14
>>> +#define DRM_AMDGPU_FENCE_TO_HANDLE    0x15
>>>     #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)
>>> @@ -69,6 +70,7 @@ extern "C" {
>>>   #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_FREESYNC DRM_IOWR(DRM_COMMAND_BASE + 
>>> DRM_AMDGPU_FREESYNC, struct drm_amdgpu_freesync)
>>> +#define DRM_IOCTL_AMDGPU_FENCE_TO_HANDLE DRM_IOWR(DRM_COMMAND_BASE 
>>> + DRM_AMDGPU_FENCE_TO_HANDLE, union drm_amdgpu_fence_to_handle)
>>>     #define AMDGPU_GEM_DOMAIN_CPU        0x1
>>>   #define AMDGPU_GEM_DOMAIN_GTT        0x2
>>> @@ -517,6 +519,20 @@ struct drm_amdgpu_cs_chunk_sem {
>>>       __u32 handle;
>>>   };
>>>   +#define AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ    0
>>> +#define AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ_FD    1
>>> +#define AMDGPU_FENCE_TO_HANDLE_GET_SYNC_FILE_FD    2
>>> +
>>> +union drm_amdgpu_fence_to_handle {
>>> +    struct {
>>> +        struct drm_amdgpu_fence fence;
>>> +        __u32 what;
>>> +    } in;
>>> +    struct {
>>> +        __u32 handle;
>>> +    } out;
>>> +};
>>> +
>>>   struct drm_amdgpu_cs_chunk_data {
>>>       union {
>>>           struct drm_amdgpu_cs_chunk_ib        ib_data;
>>
>> _______________________________________________
>> amd-gfx mailing list
>> amd-gfx@lists.freedesktop.org
>> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
>
>
syncfile is the older implementation, sync_obj is the replacement for it.

I don't think we should implement syncfile in the CS any more, sync_obj 
is already done and can be converted to/from syncfiles.

Mareks IOCTL should cover the case when we need to create a syncfile or 
syncobj from a fence sequence number.

Regards,
Christian.

Am 13.09.2017 um 09:03 schrieb zhoucm1:
> I really very surprise that you prefer to expand sync_obj to get 
> syncfile fd!!!
>
> Why not directly generate syncfile fd and use it? Which one is simple 
> is so obvious.
>
> Regards,
> David Zhou
> On 2017年09月13日 14:57, Christian König wrote:
>> Hi guys,
>>
>> Mareks IOCTL proposal looks really good to me.
>>
>> Please note that we already have sync_obj support for the CS IOCTL in 
>> the 4.13 branch and this work is based on top of that.
>>
>>> UMD don't need to construct ip_type/ip_instance/ctx_id/ring
>> Well the UMD does want to construct ip_type/ip_instance/ctx_id/ring 
>> and use for the simple reason that it allows more flexibility than 
>> sync_obj/sync_file.
>>
>> Thinking more about this I'm pretty sure we want to do something 
>> similar for VM map/unmap operations as well.
>>
>> Regards,
>> Christian.
>>
>> Am 13.09.2017 um 05:03 schrieb zhoucm1:
>>> Hi Marek,
>>>
>>> You're doing same things with me, see my "introduce syncfile as 
>>> fence reuturn" patch set, which makes things more simple, we just 
>>> need to directly return syncfile fd to UMD when CS, then the fence 
>>> UMD get will be always syncfile fd, UMD don't need to construct 
>>> ip_type/ip_instance/ctx_id/ring any more, which also can pass to 
>>> dependency and syncobj as well.
>>>
>>> Regards,
>>> David Zhou
>>> On 2017年09月13日 04:42, Marek Olšák wrote:
>>>> From: Marek Olšák <marek.olsak@amd.com>
>>>>
>>>> for being able to convert an amdgpu fence into one of the handles.
>>>> Mesa will use this.
>>>>
>>>> Signed-off-by: Marek Olšák <marek.olsak@amd.com>
>>>> ---
>>>>   drivers/gpu/drm/amd/amdgpu/amdgpu.h     |  2 ++
>>>>   drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c  | 61 
>>>> +++++++++++++++++++++++++++++++++
>>>>   drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c |  3 +-
>>>>   drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c |  1 +
>>>>   include/uapi/drm/amdgpu_drm.h           | 16 +++++++++
>>>>   5 files changed, 82 insertions(+), 1 deletion(-)
>>>>
>>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h 
>>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>>>> index b5c8b90..c15fa93 100644
>>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>>>> @@ -1308,6 +1308,8 @@ int amdgpu_gem_va_ioctl(struct drm_device 
>>>> *dev, void *data,
>>>>   int amdgpu_gem_op_ioctl(struct drm_device *dev, void *data,
>>>>               struct drm_file *filp);
>>>>   int amdgpu_cs_ioctl(struct drm_device *dev, void *data, struct 
>>>> drm_file *filp);
>>>> +int amdgpu_cs_fence_to_handle_ioctl(struct drm_device *dev, void 
>>>> *data,
>>>> +                    struct drm_file *filp);
>>>>   int amdgpu_cs_wait_ioctl(struct drm_device *dev, void *data, 
>>>> struct drm_file *filp);
>>>>   int amdgpu_cs_wait_fences_ioctl(struct drm_device *dev, void *data,
>>>>                   struct drm_file *filp);
>>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c 
>>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
>>>> index 7cb8a59..6dd719c 100644
>>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
>>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
>>>> @@ -25,6 +25,7 @@
>>>>    *    Jerome Glisse <glisse@freedesktop.org>
>>>>    */
>>>>   #include <linux/pagemap.h>
>>>> +#include <linux/sync_file.h>
>>>>   #include <drm/drmP.h>
>>>>   #include <drm/amdgpu_drm.h>
>>>>   #include <drm/drm_syncobj.h>
>>>> @@ -1311,6 +1312,66 @@ static struct dma_fence 
>>>> *amdgpu_cs_get_fence(struct amdgpu_device *adev,
>>>>       return fence;
>>>>   }
>>>>   +int amdgpu_cs_fence_to_handle_ioctl(struct drm_device *dev, void 
>>>> *data,
>>>> +                    struct drm_file *filp)
>>>> +{
>>>> +    struct amdgpu_device *adev = dev->dev_private;
>>>> +    struct amdgpu_fpriv *fpriv = filp->driver_priv;
>>>> +    union drm_amdgpu_fence_to_handle *info = data;
>>>> +    struct dma_fence *fence;
>>>> +    struct drm_syncobj *syncobj;
>>>> +    struct sync_file *sync_file;
>>>> +    int fd, r;
>>>> +
>>>> +    if (amdgpu_kms_vram_lost(adev, fpriv))
>>>> +        return -ENODEV;
>>>> +
>>>> +    fence = amdgpu_cs_get_fence(adev, filp, &info->in.fence);
>>>> +    if (IS_ERR(fence))
>>>> +        return PTR_ERR(fence);
>>>> +
>>>> +    switch (info->in.what) {
>>>> +    case AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ:
>>>> +        r = drm_syncobj_create(&syncobj, 0, fence);
>>>> +        dma_fence_put(fence);
>>>> +        if (r)
>>>> +            return r;
>>>> +        r = drm_syncobj_get_handle(filp, syncobj, &info->out.handle);
>>>> +        drm_syncobj_put(syncobj);
>>>> +        return r;
>>>> +
>>>> +    case AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ_FD:
>>>> +        r = drm_syncobj_create(&syncobj, 0, fence);
>>>> +        dma_fence_put(fence);
>>>> +        if (r)
>>>> +            return r;
>>>> +        r = drm_syncobj_get_fd(syncobj, (int*)&info->out.handle);
>>>> +        drm_syncobj_put(syncobj);
>>>> +        return r;
>>>> +
>>>> +    case AMDGPU_FENCE_TO_HANDLE_GET_SYNC_FILE_FD:
>>>> +        fd = get_unused_fd_flags(O_CLOEXEC);
>>>> +        if (fd < 0) {
>>>> +            dma_fence_put(fence);
>>>> +            return fd;
>>>> +        }
>>>> +
>>>> +        sync_file = sync_file_create(fence);
>>>> +        dma_fence_put(fence);
>>>> +        if (!sync_file) {
>>>> +            put_unused_fd(fd);
>>>> +            return -ENOMEM;
>>>> +        }
>>>> +
>>>> +        fd_install(fd, sync_file->file);
>>>> +        info->out.handle = fd;
>>>> +        return 0;
>>>> +
>>>> +    default:
>>>> +        return -EINVAL;
>>>> +    }
>>>> +}
>>>> +
>>>>   /**
>>>>    * amdgpu_cs_wait_all_fence - wait on all fences to signal
>>>>    *
>>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c 
>>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
>>>> index d01aca6..1e38411 100644
>>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
>>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
>>>> @@ -70,9 +70,10 @@
>>>>    * - 3.18.0 - Export gpu always on cu bitmap
>>>>    * - 3.19.0 - Add support for UVD MJPEG decode
>>>>    * - 3.20.0 - Add support for local BOs
>>>> + * - 3.21.0 - Add DRM_AMDGPU_FENCE_TO_HANDLE ioctl
>>>>    */
>>>>   #define KMS_DRIVER_MAJOR    3
>>>> -#define KMS_DRIVER_MINOR    20
>>>> +#define KMS_DRIVER_MINOR    21
>>>>   #define KMS_DRIVER_PATCHLEVEL    0
>>>>     int amdgpu_vram_limit = 0;
>>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c 
>>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
>>>> index d31777b..b09d315 100644
>>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
>>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
>>>> @@ -1021,6 +1021,7 @@ const struct drm_ioctl_desc 
>>>> amdgpu_ioctls_kms[] = {
>>>>       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_BO_LIST, amdgpu_bo_list_ioctl, 
>>>> DRM_AUTH|DRM_RENDER_ALLOW),
>>>> +    DRM_IOCTL_DEF_DRV(AMDGPU_FENCE_TO_HANDLE, 
>>>> amdgpu_cs_fence_to_handle_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
>>>>       /* KMS */
>>>>       DRM_IOCTL_DEF_DRV(AMDGPU_GEM_MMAP, amdgpu_gem_mmap_ioctl, 
>>>> DRM_AUTH|DRM_RENDER_ALLOW),
>>>>       DRM_IOCTL_DEF_DRV(AMDGPU_GEM_WAIT_IDLE, 
>>>> amdgpu_gem_wait_idle_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
>>>> diff --git a/include/uapi/drm/amdgpu_drm.h 
>>>> b/include/uapi/drm/amdgpu_drm.h
>>>> index 9f5bd97..ec57cd0 100644
>>>> --- a/include/uapi/drm/amdgpu_drm.h
>>>> +++ b/include/uapi/drm/amdgpu_drm.h
>>>> @@ -53,6 +53,7 @@ extern "C" {
>>>>   #define DRM_AMDGPU_WAIT_FENCES        0x12
>>>>   #define DRM_AMDGPU_VM            0x13
>>>>   #define DRM_AMDGPU_FREESYNC            0x14
>>>> +#define DRM_AMDGPU_FENCE_TO_HANDLE    0x15
>>>>     #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)
>>>> @@ -69,6 +70,7 @@ extern "C" {
>>>>   #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_FREESYNC DRM_IOWR(DRM_COMMAND_BASE + 
>>>> DRM_AMDGPU_FREESYNC, struct drm_amdgpu_freesync)
>>>> +#define DRM_IOCTL_AMDGPU_FENCE_TO_HANDLE DRM_IOWR(DRM_COMMAND_BASE 
>>>> + DRM_AMDGPU_FENCE_TO_HANDLE, union drm_amdgpu_fence_to_handle)
>>>>     #define AMDGPU_GEM_DOMAIN_CPU        0x1
>>>>   #define AMDGPU_GEM_DOMAIN_GTT        0x2
>>>> @@ -517,6 +519,20 @@ struct drm_amdgpu_cs_chunk_sem {
>>>>       __u32 handle;
>>>>   };
>>>>   +#define AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ    0
>>>> +#define AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ_FD    1
>>>> +#define AMDGPU_FENCE_TO_HANDLE_GET_SYNC_FILE_FD    2
>>>> +
>>>> +union drm_amdgpu_fence_to_handle {
>>>> +    struct {
>>>> +        struct drm_amdgpu_fence fence;
>>>> +        __u32 what;
>>>> +    } in;
>>>> +    struct {
>>>> +        __u32 handle;
>>>> +    } out;
>>>> +};
>>>> +
>>>>   struct drm_amdgpu_cs_chunk_data {
>>>>       union {
>>>>           struct drm_amdgpu_cs_chunk_ib        ib_data;
>>>
>>> _______________________________________________
>>> amd-gfx mailing list
>>> amd-gfx@lists.freedesktop.org
>>> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
>>
>>
>
> _______________________________________________
> amd-gfx mailing list
> amd-gfx@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
On 2017年09月13日 15:09, Christian König wrote:
> syncfile is the older implementation, sync_obj is the replacement for it.

Are you sure sync_obj is a replacement for syncfile? Anyone can clarify it?

sync_obj is mainly for semaphore usage, we can see sync_obj docs from 
Dave in drm_syncobj.c:
"/**
  * DOC: Overview
  *
  * DRM synchronisation objects (syncobj) are a persistent objects,
  * that contain an optional fence. The fence can be updated with a new
  * fence, or be NULL.
  *
  * syncobj's can be export to fd's and back, these fd's are opaque and
  * have no other use case, except passing the syncobj between processes.
  *
  * Their primary use-case is to implement Vulkan fences and semaphores.
  *
  * syncobj have a kref reference count, but also have an optional file.
  * The file is only created once the syncobj is exported.
  * The file takes a reference on the kref.
  */
"

>
> I don't think we should implement syncfile in the CS any more, 
> sync_obj is already done and can be converted to/from syncfiles.
>
> Mareks IOCTL should cover the case when we need to create a syncfile 
> or syncobj from a fence sequence number.

I know his convertion can do that things, but returning syncfile fd 
directly is a really simple method.

Regards,
David Zhou
>
> Regards,
> Christian.
>
> Am 13.09.2017 um 09:03 schrieb zhoucm1:
>> I really very surprise that you prefer to expand sync_obj to get 
>> syncfile fd!!!
>>
>> Why not directly generate syncfile fd and use it? Which one is simple 
>> is so obvious.
>>
>> Regards,
>> David Zhou
>> On 2017年09月13日 14:57, Christian König wrote:
>>> Hi guys,
>>>
>>> Mareks IOCTL proposal looks really good to me.
>>>
>>> Please note that we already have sync_obj support for the CS IOCTL 
>>> in the 4.13 branch and this work is based on top of that.
>>>
>>>> UMD don't need to construct ip_type/ip_instance/ctx_id/ring
>>> Well the UMD does want to construct ip_type/ip_instance/ctx_id/ring 
>>> and use for the simple reason that it allows more flexibility than 
>>> sync_obj/sync_file.
>>>
>>> Thinking more about this I'm pretty sure we want to do something 
>>> similar for VM map/unmap operations as well.
>>>
>>> Regards,
>>> Christian.
>>>
>>> Am 13.09.2017 um 05:03 schrieb zhoucm1:
>>>> Hi Marek,
>>>>
>>>> You're doing same things with me, see my "introduce syncfile as 
>>>> fence reuturn" patch set, which makes things more simple, we just 
>>>> need to directly return syncfile fd to UMD when CS, then the fence 
>>>> UMD get will be always syncfile fd, UMD don't need to construct 
>>>> ip_type/ip_instance/ctx_id/ring any more, which also can pass to 
>>>> dependency and syncobj as well.
>>>>
>>>> Regards,
>>>> David Zhou
>>>> On 2017年09月13日 04:42, Marek Olšák wrote:
>>>>> From: Marek Olšák <marek.olsak@amd.com>
>>>>>
>>>>> for being able to convert an amdgpu fence into one of the handles.
>>>>> Mesa will use this.
>>>>>
>>>>> Signed-off-by: Marek Olšák <marek.olsak@amd.com>
>>>>> ---
>>>>>   drivers/gpu/drm/amd/amdgpu/amdgpu.h     |  2 ++
>>>>>   drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c  | 61 
>>>>> +++++++++++++++++++++++++++++++++
>>>>>   drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c |  3 +-
>>>>>   drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c |  1 +
>>>>>   include/uapi/drm/amdgpu_drm.h           | 16 +++++++++
>>>>>   5 files changed, 82 insertions(+), 1 deletion(-)
>>>>>
>>>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h 
>>>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>>>>> index b5c8b90..c15fa93 100644
>>>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>>>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>>>>> @@ -1308,6 +1308,8 @@ int amdgpu_gem_va_ioctl(struct drm_device 
>>>>> *dev, void *data,
>>>>>   int amdgpu_gem_op_ioctl(struct drm_device *dev, void *data,
>>>>>               struct drm_file *filp);
>>>>>   int amdgpu_cs_ioctl(struct drm_device *dev, void *data, struct 
>>>>> drm_file *filp);
>>>>> +int amdgpu_cs_fence_to_handle_ioctl(struct drm_device *dev, void 
>>>>> *data,
>>>>> +                    struct drm_file *filp);
>>>>>   int amdgpu_cs_wait_ioctl(struct drm_device *dev, void *data, 
>>>>> struct drm_file *filp);
>>>>>   int amdgpu_cs_wait_fences_ioctl(struct drm_device *dev, void *data,
>>>>>                   struct drm_file *filp);
>>>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c 
>>>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
>>>>> index 7cb8a59..6dd719c 100644
>>>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
>>>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
>>>>> @@ -25,6 +25,7 @@
>>>>>    *    Jerome Glisse <glisse@freedesktop.org>
>>>>>    */
>>>>>   #include <linux/pagemap.h>
>>>>> +#include <linux/sync_file.h>
>>>>>   #include <drm/drmP.h>
>>>>>   #include <drm/amdgpu_drm.h>
>>>>>   #include <drm/drm_syncobj.h>
>>>>> @@ -1311,6 +1312,66 @@ static struct dma_fence 
>>>>> *amdgpu_cs_get_fence(struct amdgpu_device *adev,
>>>>>       return fence;
>>>>>   }
>>>>>   +int amdgpu_cs_fence_to_handle_ioctl(struct drm_device *dev, 
>>>>> void *data,
>>>>> +                    struct drm_file *filp)
>>>>> +{
>>>>> +    struct amdgpu_device *adev = dev->dev_private;
>>>>> +    struct amdgpu_fpriv *fpriv = filp->driver_priv;
>>>>> +    union drm_amdgpu_fence_to_handle *info = data;
>>>>> +    struct dma_fence *fence;
>>>>> +    struct drm_syncobj *syncobj;
>>>>> +    struct sync_file *sync_file;
>>>>> +    int fd, r;
>>>>> +
>>>>> +    if (amdgpu_kms_vram_lost(adev, fpriv))
>>>>> +        return -ENODEV;
>>>>> +
>>>>> +    fence = amdgpu_cs_get_fence(adev, filp, &info->in.fence);
>>>>> +    if (IS_ERR(fence))
>>>>> +        return PTR_ERR(fence);
>>>>> +
>>>>> +    switch (info->in.what) {
>>>>> +    case AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ:
>>>>> +        r = drm_syncobj_create(&syncobj, 0, fence);
>>>>> +        dma_fence_put(fence);
>>>>> +        if (r)
>>>>> +            return r;
>>>>> +        r = drm_syncobj_get_handle(filp, syncobj, 
>>>>> &info->out.handle);
>>>>> +        drm_syncobj_put(syncobj);
>>>>> +        return r;
>>>>> +
>>>>> +    case AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ_FD:
>>>>> +        r = drm_syncobj_create(&syncobj, 0, fence);
>>>>> +        dma_fence_put(fence);
>>>>> +        if (r)
>>>>> +            return r;
>>>>> +        r = drm_syncobj_get_fd(syncobj, (int*)&info->out.handle);
>>>>> +        drm_syncobj_put(syncobj);
>>>>> +        return r;
>>>>> +
>>>>> +    case AMDGPU_FENCE_TO_HANDLE_GET_SYNC_FILE_FD:
>>>>> +        fd = get_unused_fd_flags(O_CLOEXEC);
>>>>> +        if (fd < 0) {
>>>>> +            dma_fence_put(fence);
>>>>> +            return fd;
>>>>> +        }
>>>>> +
>>>>> +        sync_file = sync_file_create(fence);
>>>>> +        dma_fence_put(fence);
>>>>> +        if (!sync_file) {
>>>>> +            put_unused_fd(fd);
>>>>> +            return -ENOMEM;
>>>>> +        }
>>>>> +
>>>>> +        fd_install(fd, sync_file->file);
>>>>> +        info->out.handle = fd;
>>>>> +        return 0;
>>>>> +
>>>>> +    default:
>>>>> +        return -EINVAL;
>>>>> +    }
>>>>> +}
>>>>> +
>>>>>   /**
>>>>>    * amdgpu_cs_wait_all_fence - wait on all fences to signal
>>>>>    *
>>>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c 
>>>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
>>>>> index d01aca6..1e38411 100644
>>>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
>>>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
>>>>> @@ -70,9 +70,10 @@
>>>>>    * - 3.18.0 - Export gpu always on cu bitmap
>>>>>    * - 3.19.0 - Add support for UVD MJPEG decode
>>>>>    * - 3.20.0 - Add support for local BOs
>>>>> + * - 3.21.0 - Add DRM_AMDGPU_FENCE_TO_HANDLE ioctl
>>>>>    */
>>>>>   #define KMS_DRIVER_MAJOR    3
>>>>> -#define KMS_DRIVER_MINOR    20
>>>>> +#define KMS_DRIVER_MINOR    21
>>>>>   #define KMS_DRIVER_PATCHLEVEL    0
>>>>>     int amdgpu_vram_limit = 0;
>>>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c 
>>>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
>>>>> index d31777b..b09d315 100644
>>>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
>>>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
>>>>> @@ -1021,6 +1021,7 @@ const struct drm_ioctl_desc 
>>>>> amdgpu_ioctls_kms[] = {
>>>>>       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_BO_LIST, amdgpu_bo_list_ioctl, 
>>>>> DRM_AUTH|DRM_RENDER_ALLOW),
>>>>> +    DRM_IOCTL_DEF_DRV(AMDGPU_FENCE_TO_HANDLE, 
>>>>> amdgpu_cs_fence_to_handle_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
>>>>>       /* KMS */
>>>>>       DRM_IOCTL_DEF_DRV(AMDGPU_GEM_MMAP, amdgpu_gem_mmap_ioctl, 
>>>>> DRM_AUTH|DRM_RENDER_ALLOW),
>>>>>       DRM_IOCTL_DEF_DRV(AMDGPU_GEM_WAIT_IDLE, 
>>>>> amdgpu_gem_wait_idle_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
>>>>> diff --git a/include/uapi/drm/amdgpu_drm.h 
>>>>> b/include/uapi/drm/amdgpu_drm.h
>>>>> index 9f5bd97..ec57cd0 100644
>>>>> --- a/include/uapi/drm/amdgpu_drm.h
>>>>> +++ b/include/uapi/drm/amdgpu_drm.h
>>>>> @@ -53,6 +53,7 @@ extern "C" {
>>>>>   #define DRM_AMDGPU_WAIT_FENCES        0x12
>>>>>   #define DRM_AMDGPU_VM            0x13
>>>>>   #define DRM_AMDGPU_FREESYNC            0x14
>>>>> +#define DRM_AMDGPU_FENCE_TO_HANDLE    0x15
>>>>>     #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)
>>>>> @@ -69,6 +70,7 @@ extern "C" {
>>>>>   #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_FREESYNC DRM_IOWR(DRM_COMMAND_BASE + 
>>>>> DRM_AMDGPU_FREESYNC, struct drm_amdgpu_freesync)
>>>>> +#define DRM_IOCTL_AMDGPU_FENCE_TO_HANDLE 
>>>>> DRM_IOWR(DRM_COMMAND_BASE + DRM_AMDGPU_FENCE_TO_HANDLE, union 
>>>>> drm_amdgpu_fence_to_handle)
>>>>>     #define AMDGPU_GEM_DOMAIN_CPU        0x1
>>>>>   #define AMDGPU_GEM_DOMAIN_GTT        0x2
>>>>> @@ -517,6 +519,20 @@ struct drm_amdgpu_cs_chunk_sem {
>>>>>       __u32 handle;
>>>>>   };
>>>>>   +#define AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ    0
>>>>> +#define AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ_FD    1
>>>>> +#define AMDGPU_FENCE_TO_HANDLE_GET_SYNC_FILE_FD    2
>>>>> +
>>>>> +union drm_amdgpu_fence_to_handle {
>>>>> +    struct {
>>>>> +        struct drm_amdgpu_fence fence;
>>>>> +        __u32 what;
>>>>> +    } in;
>>>>> +    struct {
>>>>> +        __u32 handle;
>>>>> +    } out;
>>>>> +};
>>>>> +
>>>>>   struct drm_amdgpu_cs_chunk_data {
>>>>>       union {
>>>>>           struct drm_amdgpu_cs_chunk_ib        ib_data;
>>>>
>>>> _______________________________________________
>>>> amd-gfx mailing list
>>>> amd-gfx@lists.freedesktop.org
>>>> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
>>>
>>>
>>
>> _______________________________________________
>> amd-gfx mailing list
>> amd-gfx@lists.freedesktop.org
>> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
>
>
Am 13.09.2017 um 09:39 schrieb zhoucm1:
>
>
> On 2017年09月13日 15:09, Christian König wrote:
>> syncfile is the older implementation, sync_obj is the replacement for 
>> it.
>
> Are you sure sync_obj is a replacement for syncfile? Anyone can 
> clarify it?
>
> sync_obj is mainly for semaphore usage, we can see sync_obj docs from 
> Dave in drm_syncobj.c:
> "/**
>  * DOC: Overview
>  *
>  * DRM synchronisation objects (syncobj) are a persistent objects,
>  * that contain an optional fence. The fence can be updated with a new
>  * fence, or be NULL.
>  *
>  * syncobj's can be export to fd's and back, these fd's are opaque and
>  * have no other use case, except passing the syncobj between processes.
>  *
>  * Their primary use-case is to implement Vulkan fences and semaphores.
>  *
>  * syncobj have a kref reference count, but also have an optional file.
>  * The file is only created once the syncobj is exported.
>  * The file takes a reference on the kref.
>  */
> "
>

Correct, but you can convert from sync_obj into syncfile and back using 
a standard DRM IOCTL. So when we support sync_obj we also support syncfile.

>>
>> I don't think we should implement syncfile in the CS any more, 
>> sync_obj is already done and can be converted to/from syncfiles.
>>
>> Mareks IOCTL should cover the case when we need to create a syncfile 
>> or syncobj from a fence sequence number.
>
> I know his convertion can do that things, but returning syncfile fd 
> directly is a really simple method.

Well we can use sync_obj for this as well, it doesn't make so much 
difference.

Point is we shouldn't return a syncfile for VM operations because that 
will always use an fd which isn't very desirable.

Regards,
Christian.

>
> Regards,
> David Zhou
>>
>> Regards,
>> Christian.
>>
>> Am 13.09.2017 um 09:03 schrieb zhoucm1:
>>> I really very surprise that you prefer to expand sync_obj to get 
>>> syncfile fd!!!
>>>
>>> Why not directly generate syncfile fd and use it? Which one is 
>>> simple is so obvious.
>>>
>>> Regards,
>>> David Zhou
>>> On 2017年09月13日 14:57, Christian König wrote:
>>>> Hi guys,
>>>>
>>>> Mareks IOCTL proposal looks really good to me.
>>>>
>>>> Please note that we already have sync_obj support for the CS IOCTL 
>>>> in the 4.13 branch and this work is based on top of that.
>>>>
>>>>> UMD don't need to construct ip_type/ip_instance/ctx_id/ring
>>>> Well the UMD does want to construct ip_type/ip_instance/ctx_id/ring 
>>>> and use for the simple reason that it allows more flexibility than 
>>>> sync_obj/sync_file.
>>>>
>>>> Thinking more about this I'm pretty sure we want to do something 
>>>> similar for VM map/unmap operations as well.
>>>>
>>>> Regards,
>>>> Christian.
>>>>
>>>> Am 13.09.2017 um 05:03 schrieb zhoucm1:
>>>>> Hi Marek,
>>>>>
>>>>> You're doing same things with me, see my "introduce syncfile as 
>>>>> fence reuturn" patch set, which makes things more simple, we just 
>>>>> need to directly return syncfile fd to UMD when CS, then the fence 
>>>>> UMD get will be always syncfile fd, UMD don't need to construct 
>>>>> ip_type/ip_instance/ctx_id/ring any more, which also can pass to 
>>>>> dependency and syncobj as well.
>>>>>
>>>>> Regards,
>>>>> David Zhou
>>>>> On 2017年09月13日 04:42, Marek Olšák wrote:
>>>>>> From: Marek Olšák <marek.olsak@amd.com>
>>>>>>
>>>>>> for being able to convert an amdgpu fence into one of the handles.
>>>>>> Mesa will use this.
>>>>>>
>>>>>> Signed-off-by: Marek Olšák <marek.olsak@amd.com>
>>>>>> ---
>>>>>>   drivers/gpu/drm/amd/amdgpu/amdgpu.h     |  2 ++
>>>>>>   drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c  | 61 
>>>>>> +++++++++++++++++++++++++++++++++
>>>>>>   drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c |  3 +-
>>>>>>   drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c |  1 +
>>>>>>   include/uapi/drm/amdgpu_drm.h           | 16 +++++++++
>>>>>>   5 files changed, 82 insertions(+), 1 deletion(-)
>>>>>>
>>>>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h 
>>>>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>>>>>> index b5c8b90..c15fa93 100644
>>>>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>>>>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>>>>>> @@ -1308,6 +1308,8 @@ int amdgpu_gem_va_ioctl(struct drm_device 
>>>>>> *dev, void *data,
>>>>>>   int amdgpu_gem_op_ioctl(struct drm_device *dev, void *data,
>>>>>>               struct drm_file *filp);
>>>>>>   int amdgpu_cs_ioctl(struct drm_device *dev, void *data, struct 
>>>>>> drm_file *filp);
>>>>>> +int amdgpu_cs_fence_to_handle_ioctl(struct drm_device *dev, void 
>>>>>> *data,
>>>>>> +                    struct drm_file *filp);
>>>>>>   int amdgpu_cs_wait_ioctl(struct drm_device *dev, void *data, 
>>>>>> struct drm_file *filp);
>>>>>>   int amdgpu_cs_wait_fences_ioctl(struct drm_device *dev, void 
>>>>>> *data,
>>>>>>                   struct drm_file *filp);
>>>>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c 
>>>>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
>>>>>> index 7cb8a59..6dd719c 100644
>>>>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
>>>>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
>>>>>> @@ -25,6 +25,7 @@
>>>>>>    *    Jerome Glisse <glisse@freedesktop.org>
>>>>>>    */
>>>>>>   #include <linux/pagemap.h>
>>>>>> +#include <linux/sync_file.h>
>>>>>>   #include <drm/drmP.h>
>>>>>>   #include <drm/amdgpu_drm.h>
>>>>>>   #include <drm/drm_syncobj.h>
>>>>>> @@ -1311,6 +1312,66 @@ static struct dma_fence 
>>>>>> *amdgpu_cs_get_fence(struct amdgpu_device *adev,
>>>>>>       return fence;
>>>>>>   }
>>>>>>   +int amdgpu_cs_fence_to_handle_ioctl(struct drm_device *dev, 
>>>>>> void *data,
>>>>>> +                    struct drm_file *filp)
>>>>>> +{
>>>>>> +    struct amdgpu_device *adev = dev->dev_private;
>>>>>> +    struct amdgpu_fpriv *fpriv = filp->driver_priv;
>>>>>> +    union drm_amdgpu_fence_to_handle *info = data;
>>>>>> +    struct dma_fence *fence;
>>>>>> +    struct drm_syncobj *syncobj;
>>>>>> +    struct sync_file *sync_file;
>>>>>> +    int fd, r;
>>>>>> +
>>>>>> +    if (amdgpu_kms_vram_lost(adev, fpriv))
>>>>>> +        return -ENODEV;
>>>>>> +
>>>>>> +    fence = amdgpu_cs_get_fence(adev, filp, &info->in.fence);
>>>>>> +    if (IS_ERR(fence))
>>>>>> +        return PTR_ERR(fence);
>>>>>> +
>>>>>> +    switch (info->in.what) {
>>>>>> +    case AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ:
>>>>>> +        r = drm_syncobj_create(&syncobj, 0, fence);
>>>>>> +        dma_fence_put(fence);
>>>>>> +        if (r)
>>>>>> +            return r;
>>>>>> +        r = drm_syncobj_get_handle(filp, syncobj, 
>>>>>> &info->out.handle);
>>>>>> +        drm_syncobj_put(syncobj);
>>>>>> +        return r;
>>>>>> +
>>>>>> +    case AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ_FD:
>>>>>> +        r = drm_syncobj_create(&syncobj, 0, fence);
>>>>>> +        dma_fence_put(fence);
>>>>>> +        if (r)
>>>>>> +            return r;
>>>>>> +        r = drm_syncobj_get_fd(syncobj, (int*)&info->out.handle);
>>>>>> +        drm_syncobj_put(syncobj);
>>>>>> +        return r;
>>>>>> +
>>>>>> +    case AMDGPU_FENCE_TO_HANDLE_GET_SYNC_FILE_FD:
>>>>>> +        fd = get_unused_fd_flags(O_CLOEXEC);
>>>>>> +        if (fd < 0) {
>>>>>> +            dma_fence_put(fence);
>>>>>> +            return fd;
>>>>>> +        }
>>>>>> +
>>>>>> +        sync_file = sync_file_create(fence);
>>>>>> +        dma_fence_put(fence);
>>>>>> +        if (!sync_file) {
>>>>>> +            put_unused_fd(fd);
>>>>>> +            return -ENOMEM;
>>>>>> +        }
>>>>>> +
>>>>>> +        fd_install(fd, sync_file->file);
>>>>>> +        info->out.handle = fd;
>>>>>> +        return 0;
>>>>>> +
>>>>>> +    default:
>>>>>> +        return -EINVAL;
>>>>>> +    }
>>>>>> +}
>>>>>> +
>>>>>>   /**
>>>>>>    * amdgpu_cs_wait_all_fence - wait on all fences to signal
>>>>>>    *
>>>>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c 
>>>>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
>>>>>> index d01aca6..1e38411 100644
>>>>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
>>>>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
>>>>>> @@ -70,9 +70,10 @@
>>>>>>    * - 3.18.0 - Export gpu always on cu bitmap
>>>>>>    * - 3.19.0 - Add support for UVD MJPEG decode
>>>>>>    * - 3.20.0 - Add support for local BOs
>>>>>> + * - 3.21.0 - Add DRM_AMDGPU_FENCE_TO_HANDLE ioctl
>>>>>>    */
>>>>>>   #define KMS_DRIVER_MAJOR    3
>>>>>> -#define KMS_DRIVER_MINOR    20
>>>>>> +#define KMS_DRIVER_MINOR    21
>>>>>>   #define KMS_DRIVER_PATCHLEVEL    0
>>>>>>     int amdgpu_vram_limit = 0;
>>>>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c 
>>>>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
>>>>>> index d31777b..b09d315 100644
>>>>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
>>>>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
>>>>>> @@ -1021,6 +1021,7 @@ const struct drm_ioctl_desc 
>>>>>> amdgpu_ioctls_kms[] = {
>>>>>>       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_BO_LIST, amdgpu_bo_list_ioctl, 
>>>>>> DRM_AUTH|DRM_RENDER_ALLOW),
>>>>>> +    DRM_IOCTL_DEF_DRV(AMDGPU_FENCE_TO_HANDLE, 
>>>>>> amdgpu_cs_fence_to_handle_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
>>>>>>       /* KMS */
>>>>>>       DRM_IOCTL_DEF_DRV(AMDGPU_GEM_MMAP, amdgpu_gem_mmap_ioctl, 
>>>>>> DRM_AUTH|DRM_RENDER_ALLOW),
>>>>>>       DRM_IOCTL_DEF_DRV(AMDGPU_GEM_WAIT_IDLE, 
>>>>>> amdgpu_gem_wait_idle_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
>>>>>> diff --git a/include/uapi/drm/amdgpu_drm.h 
>>>>>> b/include/uapi/drm/amdgpu_drm.h
>>>>>> index 9f5bd97..ec57cd0 100644
>>>>>> --- a/include/uapi/drm/amdgpu_drm.h
>>>>>> +++ b/include/uapi/drm/amdgpu_drm.h
>>>>>> @@ -53,6 +53,7 @@ extern "C" {
>>>>>>   #define DRM_AMDGPU_WAIT_FENCES        0x12
>>>>>>   #define DRM_AMDGPU_VM            0x13
>>>>>>   #define DRM_AMDGPU_FREESYNC            0x14
>>>>>> +#define DRM_AMDGPU_FENCE_TO_HANDLE    0x15
>>>>>>     #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)
>>>>>> @@ -69,6 +70,7 @@ extern "C" {
>>>>>>   #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_FREESYNC DRM_IOWR(DRM_COMMAND_BASE + 
>>>>>> DRM_AMDGPU_FREESYNC, struct drm_amdgpu_freesync)
>>>>>> +#define DRM_IOCTL_AMDGPU_FENCE_TO_HANDLE 
>>>>>> DRM_IOWR(DRM_COMMAND_BASE + DRM_AMDGPU_FENCE_TO_HANDLE, union 
>>>>>> drm_amdgpu_fence_to_handle)
>>>>>>     #define AMDGPU_GEM_DOMAIN_CPU        0x1
>>>>>>   #define AMDGPU_GEM_DOMAIN_GTT        0x2
>>>>>> @@ -517,6 +519,20 @@ struct drm_amdgpu_cs_chunk_sem {
>>>>>>       __u32 handle;
>>>>>>   };
>>>>>>   +#define AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ    0
>>>>>> +#define AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ_FD    1
>>>>>> +#define AMDGPU_FENCE_TO_HANDLE_GET_SYNC_FILE_FD    2
>>>>>> +
>>>>>> +union drm_amdgpu_fence_to_handle {
>>>>>> +    struct {
>>>>>> +        struct drm_amdgpu_fence fence;
>>>>>> +        __u32 what;
>>>>>> +    } in;
>>>>>> +    struct {
>>>>>> +        __u32 handle;
>>>>>> +    } out;
>>>>>> +};
>>>>>> +
>>>>>>   struct drm_amdgpu_cs_chunk_data {
>>>>>>       union {
>>>>>>           struct drm_amdgpu_cs_chunk_ib        ib_data;
>>>>>
>>>>> _______________________________________________
>>>>> amd-gfx mailing list
>>>>> amd-gfx@lists.freedesktop.org
>>>>> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
>>>>
>>>>
>>>
>>> _______________________________________________
>>> amd-gfx mailing list
>>> amd-gfx@lists.freedesktop.org
>>> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
>>
>>
>
On 2017年09月13日 16:07, Christian König wrote:
> Am 13.09.2017 um 09:39 schrieb zhoucm1:
>>
>>
>> On 2017年09月13日 15:09, Christian König wrote:
>>> syncfile is the older implementation, sync_obj is the replacement 
>>> for it.
>>
>> Are you sure sync_obj is a replacement for syncfile? Anyone can 
>> clarify it?
>>
>> sync_obj is mainly for semaphore usage, we can see sync_obj docs from 
>> Dave in drm_syncobj.c:
>> "/**
>>  * DOC: Overview
>>  *
>>  * DRM synchronisation objects (syncobj) are a persistent objects,
>>  * that contain an optional fence. The fence can be updated with a new
>>  * fence, or be NULL.
>>  *
>>  * syncobj's can be export to fd's and back, these fd's are opaque and
>>  * have no other use case, except passing the syncobj between processes.
>>  *
>>  * Their primary use-case is to implement Vulkan fences and semaphores.
>>  *
>>  * syncobj have a kref reference count, but also have an optional file.
>>  * The file is only created once the syncobj is exported.
>>  * The file takes a reference on the kref.
>>  */
>> "
>>
>
> Correct, but you can convert from sync_obj into syncfile and back 
> using a standard DRM IOCTL. So when we support sync_obj we also 
> support syncfile.
>
>>>
>>> I don't think we should implement syncfile in the CS any more, 
>>> sync_obj is already done and can be converted to/from syncfiles.
>>>
>>> Mareks IOCTL should cover the case when we need to create a syncfile 
>>> or syncobj from a fence sequence number.
>>
>> I know his convertion can do that things, but returning syncfile fd 
>> directly is a really simple method.
>
> Well we can use sync_obj for this as well, it doesn't make so much 
> difference.
>
> Point is we shouldn't return a syncfile for VM operations because that 
> will always use an fd which isn't very desirable.
Have you seen Android fence fd? they are all syncfile fd, when Marek 
enables EGL_ANDROID_native_fence_sync, they will also be syncfile fd 
used by Android.

Regards,
David Zhou

>
> Regards,
> Christian.
>
>>
>> Regards,
>> David Zhou
>>>
>>> Regards,
>>> Christian.
>>>
>>> Am 13.09.2017 um 09:03 schrieb zhoucm1:
>>>> I really very surprise that you prefer to expand sync_obj to get 
>>>> syncfile fd!!!
>>>>
>>>> Why not directly generate syncfile fd and use it? Which one is 
>>>> simple is so obvious.
>>>>
>>>> Regards,
>>>> David Zhou
>>>> On 2017年09月13日 14:57, Christian König wrote:
>>>>> Hi guys,
>>>>>
>>>>> Mareks IOCTL proposal looks really good to me.
>>>>>
>>>>> Please note that we already have sync_obj support for the CS IOCTL 
>>>>> in the 4.13 branch and this work is based on top of that.
>>>>>
>>>>>> UMD don't need to construct ip_type/ip_instance/ctx_id/ring
>>>>> Well the UMD does want to construct 
>>>>> ip_type/ip_instance/ctx_id/ring and use for the simple reason that 
>>>>> it allows more flexibility than sync_obj/sync_file.
>>>>>
>>>>> Thinking more about this I'm pretty sure we want to do something 
>>>>> similar for VM map/unmap operations as well.
>>>>>
>>>>> Regards,
>>>>> Christian.
>>>>>
>>>>> Am 13.09.2017 um 05:03 schrieb zhoucm1:
>>>>>> Hi Marek,
>>>>>>
>>>>>> You're doing same things with me, see my "introduce syncfile as 
>>>>>> fence reuturn" patch set, which makes things more simple, we just 
>>>>>> need to directly return syncfile fd to UMD when CS, then the 
>>>>>> fence UMD get will be always syncfile fd, UMD don't need to 
>>>>>> construct ip_type/ip_instance/ctx_id/ring any more, which also 
>>>>>> can pass to dependency and syncobj as well.
>>>>>>
>>>>>> Regards,
>>>>>> David Zhou
>>>>>> On 2017年09月13日 04:42, Marek Olšák wrote:
>>>>>>> From: Marek Olšák <marek.olsak@amd.com>
>>>>>>>
>>>>>>> for being able to convert an amdgpu fence into one of the handles.
>>>>>>> Mesa will use this.
>>>>>>>
>>>>>>> Signed-off-by: Marek Olšák <marek.olsak@amd.com>
>>>>>>> ---
>>>>>>>   drivers/gpu/drm/amd/amdgpu/amdgpu.h     |  2 ++
>>>>>>>   drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c  | 61 
>>>>>>> +++++++++++++++++++++++++++++++++
>>>>>>>   drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c |  3 +-
>>>>>>>   drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c |  1 +
>>>>>>>   include/uapi/drm/amdgpu_drm.h           | 16 +++++++++
>>>>>>>   5 files changed, 82 insertions(+), 1 deletion(-)
>>>>>>>
>>>>>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h 
>>>>>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>>>>>>> index b5c8b90..c15fa93 100644
>>>>>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>>>>>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>>>>>>> @@ -1308,6 +1308,8 @@ int amdgpu_gem_va_ioctl(struct drm_device 
>>>>>>> *dev, void *data,
>>>>>>>   int amdgpu_gem_op_ioctl(struct drm_device *dev, void *data,
>>>>>>>               struct drm_file *filp);
>>>>>>>   int amdgpu_cs_ioctl(struct drm_device *dev, void *data, struct 
>>>>>>> drm_file *filp);
>>>>>>> +int amdgpu_cs_fence_to_handle_ioctl(struct drm_device *dev, 
>>>>>>> void *data,
>>>>>>> +                    struct drm_file *filp);
>>>>>>>   int amdgpu_cs_wait_ioctl(struct drm_device *dev, void *data, 
>>>>>>> struct drm_file *filp);
>>>>>>>   int amdgpu_cs_wait_fences_ioctl(struct drm_device *dev, void 
>>>>>>> *data,
>>>>>>>                   struct drm_file *filp);
>>>>>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c 
>>>>>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
>>>>>>> index 7cb8a59..6dd719c 100644
>>>>>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
>>>>>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
>>>>>>> @@ -25,6 +25,7 @@
>>>>>>>    *    Jerome Glisse <glisse@freedesktop.org>
>>>>>>>    */
>>>>>>>   #include <linux/pagemap.h>
>>>>>>> +#include <linux/sync_file.h>
>>>>>>>   #include <drm/drmP.h>
>>>>>>>   #include <drm/amdgpu_drm.h>
>>>>>>>   #include <drm/drm_syncobj.h>
>>>>>>> @@ -1311,6 +1312,66 @@ static struct dma_fence 
>>>>>>> *amdgpu_cs_get_fence(struct amdgpu_device *adev,
>>>>>>>       return fence;
>>>>>>>   }
>>>>>>>   +int amdgpu_cs_fence_to_handle_ioctl(struct drm_device *dev, 
>>>>>>> void *data,
>>>>>>> +                    struct drm_file *filp)
>>>>>>> +{
>>>>>>> +    struct amdgpu_device *adev = dev->dev_private;
>>>>>>> +    struct amdgpu_fpriv *fpriv = filp->driver_priv;
>>>>>>> +    union drm_amdgpu_fence_to_handle *info = data;
>>>>>>> +    struct dma_fence *fence;
>>>>>>> +    struct drm_syncobj *syncobj;
>>>>>>> +    struct sync_file *sync_file;
>>>>>>> +    int fd, r;
>>>>>>> +
>>>>>>> +    if (amdgpu_kms_vram_lost(adev, fpriv))
>>>>>>> +        return -ENODEV;
>>>>>>> +
>>>>>>> +    fence = amdgpu_cs_get_fence(adev, filp, &info->in.fence);
>>>>>>> +    if (IS_ERR(fence))
>>>>>>> +        return PTR_ERR(fence);
>>>>>>> +
>>>>>>> +    switch (info->in.what) {
>>>>>>> +    case AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ:
>>>>>>> +        r = drm_syncobj_create(&syncobj, 0, fence);
>>>>>>> +        dma_fence_put(fence);
>>>>>>> +        if (r)
>>>>>>> +            return r;
>>>>>>> +        r = drm_syncobj_get_handle(filp, syncobj, 
>>>>>>> &info->out.handle);
>>>>>>> +        drm_syncobj_put(syncobj);
>>>>>>> +        return r;
>>>>>>> +
>>>>>>> +    case AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ_FD:
>>>>>>> +        r = drm_syncobj_create(&syncobj, 0, fence);
>>>>>>> +        dma_fence_put(fence);
>>>>>>> +        if (r)
>>>>>>> +            return r;
>>>>>>> +        r = drm_syncobj_get_fd(syncobj, (int*)&info->out.handle);
>>>>>>> +        drm_syncobj_put(syncobj);
>>>>>>> +        return r;
>>>>>>> +
>>>>>>> +    case AMDGPU_FENCE_TO_HANDLE_GET_SYNC_FILE_FD:
>>>>>>> +        fd = get_unused_fd_flags(O_CLOEXEC);
>>>>>>> +        if (fd < 0) {
>>>>>>> +            dma_fence_put(fence);
>>>>>>> +            return fd;
>>>>>>> +        }
>>>>>>> +
>>>>>>> +        sync_file = sync_file_create(fence);
>>>>>>> +        dma_fence_put(fence);
>>>>>>> +        if (!sync_file) {
>>>>>>> +            put_unused_fd(fd);
>>>>>>> +            return -ENOMEM;
>>>>>>> +        }
>>>>>>> +
>>>>>>> +        fd_install(fd, sync_file->file);
>>>>>>> +        info->out.handle = fd;
>>>>>>> +        return 0;
>>>>>>> +
>>>>>>> +    default:
>>>>>>> +        return -EINVAL;
>>>>>>> +    }
>>>>>>> +}
>>>>>>> +
>>>>>>>   /**
>>>>>>>    * amdgpu_cs_wait_all_fence - wait on all fences to signal
>>>>>>>    *
>>>>>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c 
>>>>>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
>>>>>>> index d01aca6..1e38411 100644
>>>>>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
>>>>>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
>>>>>>> @@ -70,9 +70,10 @@
>>>>>>>    * - 3.18.0 - Export gpu always on cu bitmap
>>>>>>>    * - 3.19.0 - Add support for UVD MJPEG decode
>>>>>>>    * - 3.20.0 - Add support for local BOs
>>>>>>> + * - 3.21.0 - Add DRM_AMDGPU_FENCE_TO_HANDLE ioctl
>>>>>>>    */
>>>>>>>   #define KMS_DRIVER_MAJOR    3
>>>>>>> -#define KMS_DRIVER_MINOR    20
>>>>>>> +#define KMS_DRIVER_MINOR    21
>>>>>>>   #define KMS_DRIVER_PATCHLEVEL    0
>>>>>>>     int amdgpu_vram_limit = 0;
>>>>>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c 
>>>>>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
>>>>>>> index d31777b..b09d315 100644
>>>>>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
>>>>>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
>>>>>>> @@ -1021,6 +1021,7 @@ const struct drm_ioctl_desc 
>>>>>>> amdgpu_ioctls_kms[] = {
>>>>>>>       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_BO_LIST, amdgpu_bo_list_ioctl, 
>>>>>>> DRM_AUTH|DRM_RENDER_ALLOW),
>>>>>>> +    DRM_IOCTL_DEF_DRV(AMDGPU_FENCE_TO_HANDLE, 
>>>>>>> amdgpu_cs_fence_to_handle_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
>>>>>>>       /* KMS */
>>>>>>>       DRM_IOCTL_DEF_DRV(AMDGPU_GEM_MMAP, amdgpu_gem_mmap_ioctl, 
>>>>>>> DRM_AUTH|DRM_RENDER_ALLOW),
>>>>>>>       DRM_IOCTL_DEF_DRV(AMDGPU_GEM_WAIT_IDLE, 
>>>>>>> amdgpu_gem_wait_idle_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
>>>>>>> diff --git a/include/uapi/drm/amdgpu_drm.h 
>>>>>>> b/include/uapi/drm/amdgpu_drm.h
>>>>>>> index 9f5bd97..ec57cd0 100644
>>>>>>> --- a/include/uapi/drm/amdgpu_drm.h
>>>>>>> +++ b/include/uapi/drm/amdgpu_drm.h
>>>>>>> @@ -53,6 +53,7 @@ extern "C" {
>>>>>>>   #define DRM_AMDGPU_WAIT_FENCES        0x12
>>>>>>>   #define DRM_AMDGPU_VM            0x13
>>>>>>>   #define DRM_AMDGPU_FREESYNC            0x14
>>>>>>> +#define DRM_AMDGPU_FENCE_TO_HANDLE    0x15
>>>>>>>     #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)
>>>>>>> @@ -69,6 +70,7 @@ extern "C" {
>>>>>>>   #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_FREESYNC DRM_IOWR(DRM_COMMAND_BASE + 
>>>>>>> DRM_AMDGPU_FREESYNC, struct drm_amdgpu_freesync)
>>>>>>> +#define DRM_IOCTL_AMDGPU_FENCE_TO_HANDLE 
>>>>>>> DRM_IOWR(DRM_COMMAND_BASE + DRM_AMDGPU_FENCE_TO_HANDLE, union 
>>>>>>> drm_amdgpu_fence_to_handle)
>>>>>>>     #define AMDGPU_GEM_DOMAIN_CPU        0x1
>>>>>>>   #define AMDGPU_GEM_DOMAIN_GTT        0x2
>>>>>>> @@ -517,6 +519,20 @@ struct drm_amdgpu_cs_chunk_sem {
>>>>>>>       __u32 handle;
>>>>>>>   };
>>>>>>>   +#define AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ    0
>>>>>>> +#define AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ_FD    1
>>>>>>> +#define AMDGPU_FENCE_TO_HANDLE_GET_SYNC_FILE_FD    2
>>>>>>> +
>>>>>>> +union drm_amdgpu_fence_to_handle {
>>>>>>> +    struct {
>>>>>>> +        struct drm_amdgpu_fence fence;
>>>>>>> +        __u32 what;
>>>>>>> +    } in;
>>>>>>> +    struct {
>>>>>>> +        __u32 handle;
>>>>>>> +    } out;
>>>>>>> +};
>>>>>>> +
>>>>>>>   struct drm_amdgpu_cs_chunk_data {
>>>>>>>       union {
>>>>>>>           struct drm_amdgpu_cs_chunk_ib ib_data;
>>>>>>
>>>>>> _______________________________________________
>>>>>> amd-gfx mailing list
>>>>>> amd-gfx@lists.freedesktop.org
>>>>>> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
>>>>>
>>>>>
>>>>
>>>> _______________________________________________
>>>> amd-gfx mailing list
>>>> amd-gfx@lists.freedesktop.org
>>>> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
>>>
>>>
>>
>
On Wed, Sep 13, 2017 at 5:03 AM, zhoucm1 <david1.zhou@amd.com> wrote:
> Hi Marek,
>
> You're doing same things with me, see my "introduce syncfile as fence
> reuturn" patch set, which makes things more simple, we just need to directly
> return syncfile fd to UMD when CS, then the fence UMD get will be always
> syncfile fd, UMD don't need to construct ip_type/ip_instance/ctx_id/ring any
> more, which also can pass to dependency and syncobj as well.

For simpler Mesa code, Mesa won't get a sync file from the CS ioctl.

Marek
Could you describe how difficult to directly use CS syncfile fd in Mesa compared with concerting CS seq to syncfile fd via several syncobj ioctls?

Regards,
David Zhou


发自坚果 Pro

Marek Ol?醟 <maraeo@gmail.com> 于 2017年9月13日 下午6:11写道:

On Wed, Sep 13, 2017 at 5:03 AM, zhoucm1 <david1.zhou@amd.com> wrote:
> Hi Marek,

>

> You're doing same things with me, see my "introduce syncfile as fence

> reuturn" patch set, which makes things more simple, we just need to directly

> return syncfile fd to UMD when CS, then the fence UMD get will be always

> syncfile fd, UMD don't need to construct ip_type/ip_instance/ctx_id/ring any

> more, which also can pass to dependency and syncobj as well.


For simpler Mesa code, Mesa won't get a sync file from the CS ioctl.

Marek
On Wed, Sep 13, 2017 at 1:32 PM, Zhou, David(ChunMing)
<David1.Zhou@amd.com> wrote:
> Could you describe how difficult to directly use CS syncfile fd in Mesa
> compared with concerting CS seq to syncfile fd via several syncobj ioctls?

It just simplifies things. Mesa primarily uses seq_no-based fences and
will continue to use them. We can't remove the seq_no fence code
because we have to keep Mesa compatible with older kernels.

The only possibilities are:
- Mesa gets both seq_no and sync_file from CS.
- Mesa only gets seq_no from CS.

I decided to take the simpler option. I don't know if there is a perf
difference between CS returning a sync_file and using a separate
ioctl, but it's probably insignificant since we already call 3 ioctls
per IB submission (BO list create+destroy, submit).

Marek

>
> Regards,
> David Zhou
>
> 发自坚果 Pro
>
> Marek Ol?醟 <maraeo@gmail.com> 于 2017年9月13日 下午6:11写道:
>
> On Wed, Sep 13, 2017 at 5:03 AM, zhoucm1 <david1.zhou@amd.com> wrote:
>> Hi Marek,
>>
>> You're doing same things with me, see my "introduce syncfile as fence
>> reuturn" patch set, which makes things more simple, we just need to
>> directly
>> return syncfile fd to UMD when CS, then the fence UMD get will be always
>> syncfile fd, UMD don't need to construct ip_type/ip_instance/ctx_id/ring
>> any
>> more, which also can pass to dependency and syncobj as well.
>
> For simpler Mesa code, Mesa won't get a sync file from the CS ioctl.
>
> Marek
Yes, to be comptibility, I kept both seq_no and syncfile fd in the patch set, you can take a look, which really is simpler and effective way.

syncfile indeed be a good way to pass fence for user space, which already is proved in Android and is upstreamed.

Regards,
David Zhou


发自坚果 Pro

Marek Ol?醟 <maraeo@gmail.com> 于 2017年9月13日 下午8:06写道:

On Wed, Sep 13, 2017 at 1:32 PM, Zhou, David(ChunMing)
<David1.Zhou@amd.com> wrote:
> Could you describe how difficult to directly use CS syncfile fd in Mesa

> compared with concerting CS seq to syncfile fd via several syncobj ioctls?


It just simplifies things. Mesa primarily uses seq_no-based fences and
will continue to use them. We can't remove the seq_no fence code
because we have to keep Mesa compatible with older kernels.

The only possibilities are:
- Mesa gets both seq_no and sync_file from CS.
- Mesa only gets seq_no from CS.

I decided to take the simpler option. I don't know if there is a perf
difference between CS returning a sync_file and using a separate
ioctl, but it's probably insignificant since we already call 3 ioctls
per IB submission (BO list create+destroy, submit).

Marek

>

> Regards,

> David Zhou

>

> 发自坚果 Pro

>

> Marek Ol?醟 <maraeo@gmail.com> 于 2017年9月13日 下午6:11写道:

>

> On Wed, Sep 13, 2017 at 5:03 AM, zhoucm1 <david1.zhou@amd.com> wrote:

>> Hi Marek,

>>

>> You're doing same things with me, see my "introduce syncfile as fence

>> reuturn" patch set, which makes things more simple, we just need to

>> directly

>> return syncfile fd to UMD when CS, then the fence UMD get will be always

>> syncfile fd, UMD don't need to construct ip_type/ip_instance/ctx_id/ring

>> any

>> more, which also can pass to dependency and syncobj as well.

>

> For simpler Mesa code, Mesa won't get a sync file from the CS ioctl.

>

> Marek
> syncfile indeed be a good way to pass fence for user space, which already is proved in Android and is upstreamed.
Not really. syncfile needs a file descriptor for each handle it 
generates, that's quite a show stopper if you want to use it in general.

Android syncfile are meant to be used for inter process sharing, but as 
command submission sequence number they are not such a good fit.

Mareks approach looks really good to me and we should follow that 
direction further.

Regards,
Christian.

Am 13.09.2017 um 14:25 schrieb Zhou, David(ChunMing):
> Yes, to be comptibility, I kept both seq_no and syncfile fd in the patch set, you can take a look, which really is simpler and effective way.
>
> syncfile indeed be a good way to pass fence for user space, which already is proved in Android and is upstreamed.
>
> Regards,
> David Zhou
>
> 发自坚果 Pro
>
> Marek Ol?醟 <maraeo@gmail.com> 于 2017年9月13日 下午8:06写道:
>
> On Wed, Sep 13, 2017 at 1:32 PM, Zhou, David(ChunMing)
> <David1.Zhou@amd.com> wrote:
> > Could you describe how difficult to directly use CS syncfile fd in Mesa
> > compared with concerting CS seq to syncfile fd via several syncobj 
> ioctls?
>
> It just simplifies things. Mesa primarily uses seq_no-based fences and
> will continue to use them. We can't remove the seq_no fence code
> because we have to keep Mesa compatible with older kernels.
>
> The only possibilities are:
> - Mesa gets both seq_no and sync_file from CS.
> - Mesa only gets seq_no from CS.
>
> I decided to take the simpler option. I don't know if there is a perf
> difference between CS returning a sync_file and using a separate
> ioctl, but it's probably insignificant since we already call 3 ioctls
> per IB submission (BO list create+destroy, submit).
>
> Marek
>
> >
> > Regards,
> > David Zhou
> >
> > 发自坚果 Pro
> >
> > Marek Ol?醟 <maraeo@gmail.com> 于 2017年9月13日 下午6:11写道:
> >
> > On Wed, Sep 13, 2017 at 5:03 AM, zhoucm1 <david1.zhou@amd.com> wrote:
> >> Hi Marek,
> >>
> >> You're doing same things with me, see my "introduce syncfile as fence
> >> reuturn" patch set, which makes things more simple, we just need to
> >> directly
> >> return syncfile fd to UMD when CS, then the fence UMD get will be 
> always
> >> syncfile fd, UMD don't need to construct 
> ip_type/ip_instance/ctx_id/ring
> >> any
> >> more, which also can pass to dependency and syncobj as well.
> >
> > For simpler Mesa code, Mesa won't get a sync file from the CS ioctl.
> >
> > Marek
>
>
> _______________________________________________
> amd-gfx mailing list
> amd-gfx@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
For android using mesa instance, egl draw will dequeue an android buffer, after egl draw, the buffer will back to android bufffer queue, but need append a syncfile fd. If getting syncfile fd for every egl draw always needs several syncobj ioctls, the io overhead isn't small. But if we directly return syncfile when egl draw CS,  isn't it better?


发自坚果 Pro

Christian K鰊ig <deathsimple@vodafone.de> 于 2017年9月13日 下午9:04写道:

syncfile indeed be a good way to pass fence for user space, which already is proved in Android and is upstreamed.
Not really. syncfile needs a file descriptor for each handle it generates, that's quite a show stopper if you want to use it in general.

Android syncfile are meant to be used for inter process sharing, but as command submission sequence number they are not such a good fit.

Mareks approach looks really good to me and we should follow that direction further.

Regards,
Christian.

Am 13.09.2017 um 14:25 schrieb Zhou, David(ChunMing):
Yes, to be comptibility, I kept both seq_no and syncfile fd in the patch set, you can take a look, which really is simpler and effective way.

syncfile indeed be a good way to pass fence for user space, which already is proved in Android and is upstreamed.

Regards,
David Zhou


发自坚果 Pro

Marek Ol?醟 <maraeo@gmail.com><mailto:maraeo@gmail.com> 于 2017年9月13日 下午8:06写道:

On Wed, Sep 13, 2017 at 1:32 PM, Zhou, David(ChunMing)
<David1.Zhou@amd.com><mailto:David1.Zhou@amd.com> wrote:
> Could you describe how difficult to directly use CS syncfile fd in Mesa

> compared with concerting CS seq to syncfile fd via several syncobj ioctls?


It just simplifies things. Mesa primarily uses seq_no-based fences and
will continue to use them. We can't remove the seq_no fence code
because we have to keep Mesa compatible with older kernels.

The only possibilities are:
- Mesa gets both seq_no and sync_file from CS.
- Mesa only gets seq_no from CS.

I decided to take the simpler option. I don't know if there is a perf
difference between CS returning a sync_file and using a separate
ioctl, but it's probably insignificant since we already call 3 ioctls
per IB submission (BO list create+destroy, submit).

Marek

>

> Regards,

> David Zhou

>

> 发自坚果 Pro

>

> Marek Ol?醟 <maraeo@gmail.com><mailto:maraeo@gmail.com> 于 2017年9月13日 下午6:11写道:

>

> On Wed, Sep 13, 2017 at 5:03 AM, zhoucm1 <david1.zhou@amd.com><mailto:david1.zhou@amd.com> wrote:

>> Hi Marek,

>>

>> You're doing same things with me, see my "introduce syncfile as fence

>> reuturn" patch set, which makes things more simple, we just need to

>> directly

>> return syncfile fd to UMD when CS, then the fence UMD get will be always

>> syncfile fd, UMD don't need to construct ip_type/ip_instance/ctx_id/ring

>> any

>> more, which also can pass to dependency and syncobj as well.

>

> For simpler Mesa code, Mesa won't get a sync file from the CS ioctl.

>

> Marek




_______________________________________________
amd-gfx mailing list
amd-gfx@lists.freedesktop.org<mailto:amd-gfx@lists.freedesktop.org>
https://lists.freedesktop.org/mailman/listinfo/amd-gfx
On Wed, Sep 13, 2017 at 3:46 PM, Zhou, David(ChunMing)
<David1.Zhou@amd.com> wrote:
> For android using mesa instance, egl draw will dequeue an android buffer,
> after egl draw, the buffer will back to android bufffer queue, but need
> append a syncfile fd. If getting syncfile fd for every egl draw always needs
> several syncobj ioctls, the io overhead isn't small. But if we directly
> return syncfile when egl draw CS,  isn't it better?

You have a good point. I'd be OK with either approach, or even with
having both options in the kernel.

Marek
Am 13.09.2017 um 16:06 schrieb Marek Olšák:
> On Wed, Sep 13, 2017 at 3:46 PM, Zhou, David(ChunMing)
> <David1.Zhou@amd.com> wrote:
>> For android using mesa instance, egl draw will dequeue an android buffer,
>> after egl draw, the buffer will back to android bufffer queue, but need
>> append a syncfile fd. If getting syncfile fd for every egl draw always needs
>> several syncobj ioctls, the io overhead isn't small. But if we directly
>> return syncfile when egl draw CS,  isn't it better?
> You have a good point. I'd be OK with either approach, or even with
> having both options in the kernel.

I don't have a strong opinion for the CS IOCTL either. If it saves us an 
extra IOCTL when we directly return a syncfile fd then why not?

But we really shouldn't use syncfile for the VA IOCTL. That's nothing we 
want to share with other processes and the returned fence or sequence 
needs to be lightweight.

Ideally I would say it should be a sequence number, so that you can say 
max(seq1, seq2) and always have the latest.

The next best approach I think would be to use syncobj, cause it is 
simply rather easily to implement.

Christian.

>
> Marek
On 14 September 2017 at 00:16, Christian König <deathsimple@vodafone.de> wrote:
> Am 13.09.2017 um 16:06 schrieb Marek Olšák:
>>
>> On Wed, Sep 13, 2017 at 3:46 PM, Zhou, David(ChunMing)
>> <David1.Zhou@amd.com> wrote:
>>>
>>> For android using mesa instance, egl draw will dequeue an android buffer,
>>> after egl draw, the buffer will back to android bufffer queue, but need
>>> append a syncfile fd. If getting syncfile fd for every egl draw always
>>> needs
>>> several syncobj ioctls, the io overhead isn't small. But if we directly
>>> return syncfile when egl draw CS,  isn't it better?
>>
>> You have a good point. I'd be OK with either approach, or even with
>> having both options in the kernel.
>
>
> I don't have a strong opinion for the CS IOCTL either. If it saves us an
> extra IOCTL when we directly return a syncfile fd then why not?
>
> But we really shouldn't use syncfile for the VA IOCTL. That's nothing we
> want to share with other processes and the returned fence or sequence needs
> to be lightweight.
>
> Ideally I would say it should be a sequence number, so that you can say
> max(seq1, seq2) and always have the latest.
>
> The next best approach I think would be to use syncobj, cause it is simply
> rather easily to implement.

I'd go with not returning fd's by default, it's a bad use of a limited resource,
creating fd's should happen on giving the object to another process or API.

However having an optional chunk or flag to say this ioctl will return an
android sync fd if asked is fine with me, if is usually returns a syncobj.

Dave.
On 2017年09月14日 09:52, Dave Airlie wrote:
> On 14 September 2017 at 00:16, Christian König <deathsimple@vodafone.de> wrote:
>> Am 13.09.2017 um 16:06 schrieb Marek Olšák:
>>> On Wed, Sep 13, 2017 at 3:46 PM, Zhou, David(ChunMing)
>>> <David1.Zhou@amd.com> wrote:
>>>> For android using mesa instance, egl draw will dequeue an android buffer,
>>>> after egl draw, the buffer will back to android bufffer queue, but need
>>>> append a syncfile fd. If getting syncfile fd for every egl draw always
>>>> needs
>>>> several syncobj ioctls, the io overhead isn't small. But if we directly
>>>> return syncfile when egl draw CS,  isn't it better?
>>> You have a good point. I'd be OK with either approach, or even with
>>> having both options in the kernel.
>>
>> I don't have a strong opinion for the CS IOCTL either. If it saves us an
>> extra IOCTL when we directly return a syncfile fd then why not?
>>
>> But we really shouldn't use syncfile for the VA IOCTL. That's nothing we
>> want to share with other processes and the returned fence or sequence needs
>> to be lightweight.
>>
>> Ideally I would say it should be a sequence number, so that you can say
>> max(seq1, seq2) and always have the latest.
>>
>> The next best approach I think would be to use syncobj, cause it is simply
>> rather easily to implement.
> I'd go with not returning fd's by default, it's a bad use of a limited resource,
> creating fd's should happen on giving the object to another process or API.
>
> However having an optional chunk or flag to say this ioctl will return an
> android sync fd if asked is fine with me, if is usually returns a syncobj.
OK, that means we return fd only when UMD ask, right?
I will send V2.


Thanks all.
David Zhou
>
> Dave.
On 2017年09月14日 10:07, zhoucm1 wrote:
>
>
> On 2017年09月14日 09:52, Dave Airlie wrote:
>> On 14 September 2017 at 00:16, Christian König 
>> <deathsimple@vodafone.de> wrote:
>>> Am 13.09.2017 um 16:06 schrieb Marek Olšák:
>>>> On Wed, Sep 13, 2017 at 3:46 PM, Zhou, David(ChunMing)
>>>> <David1.Zhou@amd.com> wrote:
>>>>> For android using mesa instance, egl draw will dequeue an android 
>>>>> buffer,
>>>>> after egl draw, the buffer will back to android bufffer queue, but 
>>>>> need
>>>>> append a syncfile fd. If getting syncfile fd for every egl draw 
>>>>> always
>>>>> needs
>>>>> several syncobj ioctls, the io overhead isn't small. But if we 
>>>>> directly
>>>>> return syncfile when egl draw CS,  isn't it better?
>>>> You have a good point. I'd be OK with either approach, or even with
>>>> having both options in the kernel.
>>>
>>> I don't have a strong opinion for the CS IOCTL either. If it saves 
>>> us an
>>> extra IOCTL when we directly return a syncfile fd then why not?
>>>
>>> But we really shouldn't use syncfile for the VA IOCTL. That's 
>>> nothing we
>>> want to share with other processes and the returned fence or 
>>> sequence needs
>>> to be lightweight.
>>>
>>> Ideally I would say it should be a sequence number, so that you can say
>>> max(seq1, seq2) and always have the latest.
>>>
>>> The next best approach I think would be to use syncobj, cause it is 
>>> simply
>>> rather easily to implement.
>> I'd go with not returning fd's by default, it's a bad use of a 
>> limited resource,
>> creating fd's should happen on giving the object to another process 
>> or API.
>>
>> However having an optional chunk or flag to say this ioctl will 
>> return an
>> android sync fd if asked is fine with me, if is usually returns a 
>> syncobj.
> OK, that means we return fd only when UMD ask, right?
> I will send V2.
But think a bit more, if not by default, that isn't meaningful, we can 
continue to use seq_no base fence and Marek's syncfile fd approach.

Regards,
David Zhou
>
>
> Thanks all.
> David Zhou
>>
>> Dave.
>
>
> But think a bit more, if not by default, that isn't meaningful, we can
> continue to use seq_no base fence and Marek's syncfile fd approach.
>

At least for radv I've no interest in every CS ioctl returning an fd
that I have to
close.

Dave.
On 2017年09月14日 10:33, Dave Airlie wrote:
>> But think a bit more, if not by default, that isn't meaningful, we can
>> continue to use seq_no base fence and Marek's syncfile fd approach.
>>
> At least for radv I've no interest in every CS ioctl returning an fd
> that I have to
> close.
OK, let's pend it now. It doesn't matter.

Regards,
David Zhou
>
> Dave.
Can I get Rb for this series?

Thanks,
Marek

On Tue, Sep 12, 2017 at 10:42 PM, Marek Olšák <maraeo@gmail.com> wrote:
> From: Marek Olšák <marek.olsak@amd.com>
>
> for being able to convert an amdgpu fence into one of the handles.
> Mesa will use this.
>
> Signed-off-by: Marek Olšák <marek.olsak@amd.com>
> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu.h     |  2 ++
>  drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c  | 61 +++++++++++++++++++++++++++++++++
>  drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c |  3 +-
>  drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c |  1 +
>  include/uapi/drm/amdgpu_drm.h           | 16 +++++++++
>  5 files changed, 82 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> index b5c8b90..c15fa93 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> @@ -1308,6 +1308,8 @@ int amdgpu_gem_va_ioctl(struct drm_device *dev, void *data,
>  int amdgpu_gem_op_ioctl(struct drm_device *dev, void *data,
>                         struct drm_file *filp);
>  int amdgpu_cs_ioctl(struct drm_device *dev, void *data, struct drm_file *filp);
> +int amdgpu_cs_fence_to_handle_ioctl(struct drm_device *dev, void *data,
> +                                   struct drm_file *filp);
>  int amdgpu_cs_wait_ioctl(struct drm_device *dev, void *data, struct drm_file *filp);
>  int amdgpu_cs_wait_fences_ioctl(struct drm_device *dev, void *data,
>                                 struct drm_file *filp);
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> index 7cb8a59..6dd719c 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> @@ -25,6 +25,7 @@
>   *    Jerome Glisse <glisse@freedesktop.org>
>   */
>  #include <linux/pagemap.h>
> +#include <linux/sync_file.h>
>  #include <drm/drmP.h>
>  #include <drm/amdgpu_drm.h>
>  #include <drm/drm_syncobj.h>
> @@ -1311,6 +1312,66 @@ static struct dma_fence *amdgpu_cs_get_fence(struct amdgpu_device *adev,
>         return fence;
>  }
>
> +int amdgpu_cs_fence_to_handle_ioctl(struct drm_device *dev, void *data,
> +                                   struct drm_file *filp)
> +{
> +       struct amdgpu_device *adev = dev->dev_private;
> +       struct amdgpu_fpriv *fpriv = filp->driver_priv;
> +       union drm_amdgpu_fence_to_handle *info = data;
> +       struct dma_fence *fence;
> +       struct drm_syncobj *syncobj;
> +       struct sync_file *sync_file;
> +       int fd, r;
> +
> +       if (amdgpu_kms_vram_lost(adev, fpriv))
> +               return -ENODEV;
> +
> +       fence = amdgpu_cs_get_fence(adev, filp, &info->in.fence);
> +       if (IS_ERR(fence))
> +               return PTR_ERR(fence);
> +
> +       switch (info->in.what) {
> +       case AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ:
> +               r = drm_syncobj_create(&syncobj, 0, fence);
> +               dma_fence_put(fence);
> +               if (r)
> +                       return r;
> +               r = drm_syncobj_get_handle(filp, syncobj, &info->out.handle);
> +               drm_syncobj_put(syncobj);
> +               return r;
> +
> +       case AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ_FD:
> +               r = drm_syncobj_create(&syncobj, 0, fence);
> +               dma_fence_put(fence);
> +               if (r)
> +                       return r;
> +               r = drm_syncobj_get_fd(syncobj, (int*)&info->out.handle);
> +               drm_syncobj_put(syncobj);
> +               return r;
> +
> +       case AMDGPU_FENCE_TO_HANDLE_GET_SYNC_FILE_FD:
> +               fd = get_unused_fd_flags(O_CLOEXEC);
> +               if (fd < 0) {
> +                       dma_fence_put(fence);
> +                       return fd;
> +               }
> +
> +               sync_file = sync_file_create(fence);
> +               dma_fence_put(fence);
> +               if (!sync_file) {
> +                       put_unused_fd(fd);
> +                       return -ENOMEM;
> +               }
> +
> +               fd_install(fd, sync_file->file);
> +               info->out.handle = fd;
> +               return 0;
> +
> +       default:
> +               return -EINVAL;
> +       }
> +}
> +
>  /**
>   * amdgpu_cs_wait_all_fence - wait on all fences to signal
>   *
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> index d01aca6..1e38411 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> @@ -70,9 +70,10 @@
>   * - 3.18.0 - Export gpu always on cu bitmap
>   * - 3.19.0 - Add support for UVD MJPEG decode
>   * - 3.20.0 - Add support for local BOs
> + * - 3.21.0 - Add DRM_AMDGPU_FENCE_TO_HANDLE ioctl
>   */
>  #define KMS_DRIVER_MAJOR       3
> -#define KMS_DRIVER_MINOR       20
> +#define KMS_DRIVER_MINOR       21
>  #define KMS_DRIVER_PATCHLEVEL  0
>
>  int amdgpu_vram_limit = 0;
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> index d31777b..b09d315 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> @@ -1021,6 +1021,7 @@ const struct drm_ioctl_desc amdgpu_ioctls_kms[] = {
>         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_BO_LIST, amdgpu_bo_list_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
> +       DRM_IOCTL_DEF_DRV(AMDGPU_FENCE_TO_HANDLE, amdgpu_cs_fence_to_handle_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
>         /* KMS */
>         DRM_IOCTL_DEF_DRV(AMDGPU_GEM_MMAP, amdgpu_gem_mmap_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
>         DRM_IOCTL_DEF_DRV(AMDGPU_GEM_WAIT_IDLE, amdgpu_gem_wait_idle_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
> diff --git a/include/uapi/drm/amdgpu_drm.h b/include/uapi/drm/amdgpu_drm.h
> index 9f5bd97..ec57cd0 100644
> --- a/include/uapi/drm/amdgpu_drm.h
> +++ b/include/uapi/drm/amdgpu_drm.h
> @@ -53,6 +53,7 @@ extern "C" {
>  #define DRM_AMDGPU_WAIT_FENCES         0x12
>  #define DRM_AMDGPU_VM                  0x13
>  #define DRM_AMDGPU_FREESYNC            0x14
> +#define DRM_AMDGPU_FENCE_TO_HANDLE     0x15
>
>  #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)
> @@ -69,6 +70,7 @@ extern "C" {
>  #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_FREESYNC      DRM_IOWR(DRM_COMMAND_BASE + DRM_AMDGPU_FREESYNC, struct drm_amdgpu_freesync)
> +#define DRM_IOCTL_AMDGPU_FENCE_TO_HANDLE DRM_IOWR(DRM_COMMAND_BASE + DRM_AMDGPU_FENCE_TO_HANDLE, union drm_amdgpu_fence_to_handle)
>
>  #define AMDGPU_GEM_DOMAIN_CPU          0x1
>  #define AMDGPU_GEM_DOMAIN_GTT          0x2
> @@ -517,6 +519,20 @@ struct drm_amdgpu_cs_chunk_sem {
>         __u32 handle;
>  };
>
> +#define AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ     0
> +#define AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ_FD  1
> +#define AMDGPU_FENCE_TO_HANDLE_GET_SYNC_FILE_FD        2
> +
> +union drm_amdgpu_fence_to_handle {
> +       struct {
> +               struct drm_amdgpu_fence fence;
> +               __u32 what;
> +       } in;
> +       struct {
> +               __u32 handle;
> +       } out;
> +};
> +
>  struct drm_amdgpu_cs_chunk_data {
>         union {
>                 struct drm_amdgpu_cs_chunk_ib           ib_data;
> --
> 2.7.4
>
On 29 September 2017 at 06:41, Marek Olšák <maraeo@gmail.com> wrote:
> Can I get Rb for this series?
>

For the series,

Reviewed-by: Dave Airlie <airlied@redhat.com>

Alex, please merge the two drm core precursor with patch 3.

Dave.
On Fri, Sep 29, 2017 at 1:42 AM, Dave Airlie <airlied@gmail.com> wrote:
> On 29 September 2017 at 06:41, Marek Olšák <maraeo@gmail.com> wrote:
>> Can I get Rb for this series?
>>
>
> For the series,
>
> Reviewed-by: Dave Airlie <airlied@redhat.com>
>
> Alex, please merge the two drm core precursor with patch 3.

Alex, this is for drm-next, where I can't push.

Thanks,
Marek