[PATCH 3/6] drm/nouveau: Support fence FDs at kickoff
Thierry Reding
thierry.reding at gmail.com
Fri Aug 28 10:40:13 UTC 2020
From: Thierry Reding <treding at nvidia.com>
Add a new NOUVEAU_GEM_PUSHBUF2 IOCTL that accepts and emits a sync fence
FD from/to userspace if requested by the corresponding flags.
Based heavily on work by Lauri Peltonen <lpeltonen at nvidia.com>
Signed-off-by: Thierry Reding <treding at nvidia.com>
---
drivers/gpu/drm/nouveau/nouveau_drm.c | 1 +
drivers/gpu/drm/nouveau/nouveau_gem.c | 79 +++++++++++++++++++++++++--
drivers/gpu/drm/nouveau/nouveau_gem.h | 2 +
include/uapi/drm/nouveau_drm.h | 14 +++++
4 files changed, 92 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouveau/nouveau_drm.c
index 22d246acc5e5..c9cb2648a28b 100644
--- a/drivers/gpu/drm/nouveau/nouveau_drm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_drm.c
@@ -1140,6 +1140,7 @@ nouveau_ioctls[] = {
DRM_IOCTL_DEF_DRV(NOUVEAU_GEM_CPU_PREP, nouveau_gem_ioctl_cpu_prep, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(NOUVEAU_GEM_CPU_FINI, nouveau_gem_ioctl_cpu_fini, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(NOUVEAU_GEM_INFO, nouveau_gem_ioctl_info, DRM_RENDER_ALLOW),
+ DRM_IOCTL_DEF_DRV(NOUVEAU_GEM_PUSHBUF2, nouveau_gem_ioctl_pushbuf2, DRM_RENDER_ALLOW),
};
long
diff --git a/drivers/gpu/drm/nouveau/nouveau_gem.c b/drivers/gpu/drm/nouveau/nouveau_gem.c
index 590e4c1d2e8a..039f244c0a00 100644
--- a/drivers/gpu/drm/nouveau/nouveau_gem.c
+++ b/drivers/gpu/drm/nouveau/nouveau_gem.c
@@ -24,6 +24,9 @@
*
*/
+#include <linux/file.h>
+#include <linux/sync_file.h>
+
#include "nouveau_drv.h"
#include "nouveau_dma.h"
#include "nouveau_fence.h"
@@ -677,24 +680,30 @@ nouveau_gem_pushbuf_reloc_apply(struct nouveau_cli *cli,
return ret;
}
-int
-nouveau_gem_ioctl_pushbuf(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
+static int
+__nouveau_gem_ioctl_pushbuf(struct drm_device *dev,
+ struct drm_nouveau_gem_pushbuf2 *request,
+ struct drm_file *file_priv)
{
struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv);
struct nouveau_cli *cli = nouveau_cli(file_priv);
struct nouveau_abi16_chan *temp;
struct nouveau_drm *drm = nouveau_drm(dev);
- struct drm_nouveau_gem_pushbuf *req = data;
+ struct drm_nouveau_gem_pushbuf *req = &request->base;
struct drm_nouveau_gem_pushbuf_push *push;
struct drm_nouveau_gem_pushbuf_reloc *reloc = NULL;
struct drm_nouveau_gem_pushbuf_bo *bo;
struct nouveau_channel *chan = NULL;
struct validate_op op;
struct nouveau_fence *fence = NULL;
+ struct dma_fence *prefence = NULL;
int i, j, ret = 0;
bool do_reloc = false, sync = false;
+ /* check for unrecognized flags */
+ if (request->flags & ~NOUVEAU_GEM_PUSHBUF_FLAGS)
+ return -EINVAL;
+
if (unlikely(!abi16))
return -ENOMEM;
@@ -764,6 +773,15 @@ nouveau_gem_ioctl_pushbuf(struct drm_device *dev, void *data,
goto out_prevalid;
}
+ if (request->flags & NOUVEAU_GEM_PUSHBUF_FENCE_WAIT) {
+ prefence = sync_file_get_fence(request->fence);
+ if (prefence) {
+ ret = nouveau_fence_sync(prefence, chan, true);
+ if (ret < 0)
+ goto out;
+ }
+ }
+
/* Apply any relocations that are required */
if (do_reloc) {
if (!reloc) {
@@ -865,7 +883,30 @@ nouveau_gem_ioctl_pushbuf(struct drm_device *dev, void *data,
}
}
+ if (request->flags & NOUVEAU_GEM_PUSHBUF_FENCE_EMIT) {
+ struct sync_file *file;
+ int fd;
+
+ fd = get_unused_fd_flags(O_CLOEXEC);
+ if (fd < 0) {
+ ret = fd;
+ goto out;
+ }
+
+ file = sync_file_create(&fence->base);
+ if (!file) {
+ put_unused_fd(fd);
+ goto out;
+ }
+
+ fd_install(fd, file->file);
+ request->fence = fd;
+ }
+
out:
+ if (prefence)
+ dma_fence_put(prefence);
+
validate_fini(&op, chan, fence, bo);
nouveau_fence_unref(&fence);
@@ -906,6 +947,27 @@ nouveau_gem_ioctl_pushbuf(struct drm_device *dev, void *data,
return nouveau_abi16_put(abi16, ret);
}
+int
+nouveau_gem_ioctl_pushbuf(struct drm_device *dev, void *data,
+ struct drm_file *file_priv)
+{
+ struct drm_nouveau_gem_pushbuf *request = data;
+ struct drm_nouveau_gem_pushbuf2 req;
+ int ret;
+
+ memset(&req, 0, sizeof(req));
+ memcpy(&req.base, request, sizeof(*request));
+
+ ret = __nouveau_gem_ioctl_pushbuf(dev, &req, file_priv);
+
+ request->gart_available = req.base.gart_available;
+ request->vram_available = req.base.vram_available;
+ request->suffix1 = req.base.suffix1;
+ request->suffix0 = req.base.suffix0;
+
+ return ret;
+}
+
int
nouveau_gem_ioctl_cpu_prep(struct drm_device *dev, void *data,
struct drm_file *file_priv)
@@ -973,3 +1035,12 @@ nouveau_gem_ioctl_info(struct drm_device *dev, void *data,
return ret;
}
+int
+nouveau_gem_ioctl_pushbuf2(struct drm_device *dev, void *data,
+ struct drm_file *file_priv)
+{
+ struct drm_nouveau_gem_pushbuf2 *req = data;
+
+ return __nouveau_gem_ioctl_pushbuf(dev, req, file_priv);
+}
+
diff --git a/drivers/gpu/drm/nouveau/nouveau_gem.h b/drivers/gpu/drm/nouveau/nouveau_gem.h
index 978e07591990..652a63242303 100644
--- a/drivers/gpu/drm/nouveau/nouveau_gem.h
+++ b/drivers/gpu/drm/nouveau/nouveau_gem.h
@@ -29,6 +29,8 @@ extern int nouveau_gem_ioctl_cpu_fini(struct drm_device *, void *,
struct drm_file *);
extern int nouveau_gem_ioctl_info(struct drm_device *, void *,
struct drm_file *);
+extern int nouveau_gem_ioctl_pushbuf2(struct drm_device *, void *,
+ struct drm_file *);
extern int nouveau_gem_prime_pin(struct drm_gem_object *);
extern void nouveau_gem_prime_unpin(struct drm_gem_object *);
diff --git a/include/uapi/drm/nouveau_drm.h b/include/uapi/drm/nouveau_drm.h
index 853a327433d3..85425dc90301 100644
--- a/include/uapi/drm/nouveau_drm.h
+++ b/include/uapi/drm/nouveau_drm.h
@@ -115,6 +115,18 @@ struct drm_nouveau_gem_pushbuf {
__u64 gart_available;
};
+#define NOUVEAU_GEM_PUSHBUF_FENCE_WAIT (1 << 0)
+#define NOUVEAU_GEM_PUSHBUF_FENCE_EMIT (1 << 1)
+#define NOUVEAU_GEM_PUSHBUF_FLAGS (NOUVEAU_GEM_PUSHBUF_FENCE_WAIT | \
+ NOUVEAU_GEM_PUSHBUF_FENCE_EMIT)
+
+struct drm_nouveau_gem_pushbuf2 {
+ struct drm_nouveau_gem_pushbuf base;
+ __u32 flags;
+ __s32 fence;
+ __u64 reserved;
+};
+
#define NOUVEAU_GEM_CPU_PREP_NOWAIT 0x00000001
#define NOUVEAU_GEM_CPU_PREP_WRITE 0x00000004
struct drm_nouveau_gem_cpu_prep {
@@ -141,6 +153,7 @@ struct drm_nouveau_gem_cpu_fini {
#define DRM_NOUVEAU_GEM_CPU_PREP 0x42
#define DRM_NOUVEAU_GEM_CPU_FINI 0x43
#define DRM_NOUVEAU_GEM_INFO 0x44
+#define DRM_NOUVEAU_GEM_PUSHBUF2 0x45
struct drm_nouveau_svm_init {
__u64 unmanaged_addr;
@@ -196,6 +209,7 @@ struct drm_nouveau_svm_bind {
#define DRM_IOCTL_NOUVEAU_GEM_CPU_PREP DRM_IOW (DRM_COMMAND_BASE + DRM_NOUVEAU_GEM_CPU_PREP, struct drm_nouveau_gem_cpu_prep)
#define DRM_IOCTL_NOUVEAU_GEM_CPU_FINI DRM_IOW (DRM_COMMAND_BASE + DRM_NOUVEAU_GEM_CPU_FINI, struct drm_nouveau_gem_cpu_fini)
#define DRM_IOCTL_NOUVEAU_GEM_INFO DRM_IOWR(DRM_COMMAND_BASE + DRM_NOUVEAU_GEM_INFO, struct drm_nouveau_gem_info)
+#define DRM_IOCTL_NOUVEAU_GEM_PUSHBUF2 DRM_IOWR(DRM_COMMAND_BASE + DRM_NOUVEAU_GEM_PUSHBUF2, struct drm_nouveau_gem_pushbuf2)
#if defined(__cplusplus)
}
--
2.28.0
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