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Alexandre Courbot

2015-Jun-15 07:09 UTC

[Nouveau] [PATCH v2 0/2] drm/nouveau: option for staging ioctls and new GEM_SET_TILING ioctl

Second version of this patchset addressing Ben's comments and fixing a few
extra things.

This patchset proposes to introduce a "staging" module option to
dynamically
enable features (mostly ioctls) that are merged but may be refined before
they are declared "stable". The second patch illustrates the use of
this
staging option with the SET_TILING ioctl, which can be used to specify the
tiling options of a PRIME-imported buffer.

The staging parameter will allow us (particularly, us at NVIDIA) to experiment
more freely with new features and avoid carrying out-of-tree patches for long
periods of time. To prevent abuse, the number of staging ioctls is limited to 8
(range 0x98 to 0xa0) that are to be recycled as staging ioctls become stable and
are assigned a final number.

Changes since v1:
- Use one module option per staging ioctl
- Only allow GEM_SET_TILING to be called on dma-buf imported buffers
- Move the code setting nvkm_mem::memtype into its own function to avoid
  duplicating code

Alexandre Courbot (1):
  drm/nouveau: placeholders for staging ioctls

Ari Hirvonen (1):
  drm/nouveau: add GEM_SET_TILING staging ioctl

 drm/nouveau/nouveau_bo.c           | 18 ++++++++++++
 drm/nouveau/nouveau_bo.h           |  2 ++
 drm/nouveau/nouveau_drm.c          |  7 +++++
 drm/nouveau/nouveau_gem.c          | 58 ++++++++++++++++++++++++++++++++++++++
 drm/nouveau/nouveau_gem.h          |  2 ++
 drm/nouveau/nouveau_ttm.c          | 13 +--------
 drm/nouveau/uapi/drm/nouveau_drm.h | 11 ++++++++
 7 files changed, 99 insertions(+), 12 deletions(-)

-- 
2.4.2

Alexandre Courbot

2015-Jun-15 07:09 UTC

head link

[Nouveau] [PATCH v2 1/2] drm/nouveau: placeholders for staging ioctls

Reserve the 8 highest ioctls for "staging" features, i.e. ioctls that
may change or be dropped altogether and that thus should not be given a
definite number. This will allow us to experiment with experimental APIs
for a while before setting them in stone.

Staging ioctls are not expected to stay there for a long time, so we
limit their number. Besides, each staging ioctls needs to be explicitly
enabled through its own module option.

Signed-off-by: Alexandre Courbot <acourbot at nvidia.com>
---
 drm/nouveau/nouveau_drm.c          | 1 +
 drm/nouveau/uapi/drm/nouveau_drm.h | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/drm/nouveau/nouveau_drm.c b/drm/nouveau/nouveau_drm.c
index 63f1d39e8358..28860268cf38 100644
--- a/drm/nouveau/nouveau_drm.c
+++ b/drm/nouveau/nouveau_drm.c
@@ -896,6 +896,7 @@ nouveau_ioctls[] = {
 	DRM_IOCTL_DEF_DRV(NOUVEAU_GEM_CPU_PREP, nouveau_gem_ioctl_cpu_prep,
DRM_UNLOCKED|DRM_AUTH|DRM_RENDER_ALLOW),
 	DRM_IOCTL_DEF_DRV(NOUVEAU_GEM_CPU_FINI, nouveau_gem_ioctl_cpu_fini,
DRM_UNLOCKED|DRM_AUTH|DRM_RENDER_ALLOW),
 	DRM_IOCTL_DEF_DRV(NOUVEAU_GEM_INFO, nouveau_gem_ioctl_info,
DRM_UNLOCKED|DRM_AUTH|DRM_RENDER_ALLOW),
+	/* Staging ioctls */
 };
 
 long
diff --git a/drm/nouveau/uapi/drm/nouveau_drm.h
b/drm/nouveau/uapi/drm/nouveau_drm.h
index 5507eead5863..4e7e21f41b5c 100644
--- a/drm/nouveau/uapi/drm/nouveau_drm.h
+++ b/drm/nouveau/uapi/drm/nouveau_drm.h
@@ -140,11 +140,14 @@ 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
+/* range 0x98..DRM_COMMAND_END (8 entries) is reserved for staging, unstable
ioctls */
+#define DRM_NOUVEAU_STAGING_IOCTL      0x58
 
 #define DRM_IOCTL_NOUVEAU_GEM_NEW            DRM_IOWR(DRM_COMMAND_BASE +
DRM_NOUVEAU_GEM_NEW, struct drm_nouveau_gem_new)
 #define DRM_IOCTL_NOUVEAU_GEM_PUSHBUF        DRM_IOWR(DRM_COMMAND_BASE +
DRM_NOUVEAU_GEM_PUSHBUF, struct drm_nouveau_gem_pushbuf)
 #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)
+/* staging ioctls */
 
 #endif /* __NOUVEAU_DRM_H__ */
-- 
2.4.2

Alexandre Courbot

2015-Jun-15 07:09 UTC

head link

[Nouveau] [PATCH v2 2/2] drm/nouveau: add GEM_SET_TILING staging ioctl

From: Ari Hirvonen <ahirvonen at nvidia.com>

Add new NOUVEAU_GEM_SET_TILING ioctl to set correct tiling
mode for imported dma-bufs. This ioctl is staging for now
and enabled with the "staging_tiling" module option.

Signed-off-by: Ari Hirvonen <ahirvonen at nvidia.com>
[acourbot at nvidia.com: carry upstream, many fixes]
Signed-off-by: Alexandre Courbot <acourbot at nvidia.com>
---
 drm/nouveau/nouveau_bo.c           | 18 ++++++++++++
 drm/nouveau/nouveau_bo.h           |  2 ++
 drm/nouveau/nouveau_drm.c          |  6 ++++
 drm/nouveau/nouveau_gem.c          | 58 ++++++++++++++++++++++++++++++++++++++
 drm/nouveau/nouveau_gem.h          |  2 ++
 drm/nouveau/nouveau_ttm.c          | 13 +--------
 drm/nouveau/uapi/drm/nouveau_drm.h |  8 ++++++
 7 files changed, 95 insertions(+), 12 deletions(-)

diff --git a/drm/nouveau/nouveau_bo.c b/drm/nouveau/nouveau_bo.c
index 6edcce1658b7..2a2ebbeb4fc0 100644
--- a/drm/nouveau/nouveau_bo.c
+++ b/drm/nouveau/nouveau_bo.c
@@ -178,6 +178,24 @@ nouveau_bo_fixup_align(struct nouveau_bo *nvbo, u32 flags,
 	*size = roundup(*size, PAGE_SIZE);
 }
 
+void
+nouveau_bo_update_tiling(struct nouveau_drm *drm, struct nouveau_bo *nvbo,
+			 struct nvkm_mem *mem)
+{
+	switch (drm->device.info.family) {
+	case NV_DEVICE_INFO_V0_TESLA:
+		if (drm->device.info.chipset != 0x50)
+			mem->memtype = (nvbo->tile_flags & 0x7f00) >> 8;
+		break;
+	case NV_DEVICE_INFO_V0_FERMI:
+	case NV_DEVICE_INFO_V0_KEPLER:
+		mem->memtype = (nvbo->tile_flags & 0xff00) >> 8;
+		break;
+	default:
+		break;
+	}
+}
+
 int
 nouveau_bo_new(struct drm_device *dev, int size, int align,
 	       uint32_t flags, uint32_t tile_mode, uint32_t tile_flags,
diff --git a/drm/nouveau/nouveau_bo.h b/drm/nouveau/nouveau_bo.h
index e42360983229..87d07e3533eb 100644
--- a/drm/nouveau/nouveau_bo.h
+++ b/drm/nouveau/nouveau_bo.h
@@ -69,6 +69,8 @@ nouveau_bo_ref(struct nouveau_bo *ref, struct nouveau_bo
**pnvbo)
 extern struct ttm_bo_driver nouveau_bo_driver;
 
 void nouveau_bo_move_init(struct nouveau_drm *);
+void nouveau_bo_update_tiling(struct nouveau_drm *, struct nouveau_bo *,
+			      struct nvkm_mem *);
 int  nouveau_bo_new(struct drm_device *, int size, int align, u32 flags,
 		    u32 tile_mode, u32 tile_flags, struct sg_table *sg,
 		    struct reservation_object *robj,
diff --git a/drm/nouveau/nouveau_drm.c b/drm/nouveau/nouveau_drm.c
index 28860268cf38..45a2c88ebf8e 100644
--- a/drm/nouveau/nouveau_drm.c
+++ b/drm/nouveau/nouveau_drm.c
@@ -75,6 +75,10 @@ MODULE_PARM_DESC(runpm, "disable (0), force enable (1),
optimus only default (-1
 int nouveau_runtime_pm = -1;
 module_param_named(runpm, nouveau_runtime_pm, int, 0400);
 
+MODULE_PARM_DESC(staging_tiling, "enable staging GEM_SET_TILING
ioctl");
+int nouveau_staging_tiling = 0;
+module_param_named(staging_tiling, nouveau_staging_tiling, int, 0600);
+
 static struct drm_driver driver_stub;
 static struct drm_driver driver_pci;
 static struct drm_driver driver_platform;
@@ -897,6 +901,7 @@ nouveau_ioctls[] = {
 	DRM_IOCTL_DEF_DRV(NOUVEAU_GEM_CPU_FINI, nouveau_gem_ioctl_cpu_fini,
DRM_UNLOCKED|DRM_AUTH|DRM_RENDER_ALLOW),
 	DRM_IOCTL_DEF_DRV(NOUVEAU_GEM_INFO, nouveau_gem_ioctl_info,
DRM_UNLOCKED|DRM_AUTH|DRM_RENDER_ALLOW),
 	/* Staging ioctls */
+	DRM_IOCTL_DEF_DRV(NOUVEAU_GEM_SET_TILING, nouveau_gem_ioctl_set_tiling,
DRM_UNLOCKED|DRM_AUTH|DRM_RENDER_ALLOW),
 };
 
 long
@@ -1029,6 +1034,7 @@ static void nouveau_display_options(void)
 	DRM_DEBUG_DRIVER("... runpm        : %d\n", nouveau_runtime_pm);
 	DRM_DEBUG_DRIVER("... vram_pushbuf : %d\n", nouveau_vram_pushbuf);
 	DRM_DEBUG_DRIVER("... pstate       : %d\n", nouveau_pstate);
+	DRM_DEBUG_DRIVER("... staging_tiling: %d\n",
nouveau_staging_tiling);
 }
 
 static const struct dev_pm_ops nouveau_pm_ops = {
diff --git a/drm/nouveau/nouveau_gem.c b/drm/nouveau/nouveau_gem.c
index 0e690bf19fc9..0e69449798aa 100644
--- a/drm/nouveau/nouveau_gem.c
+++ b/drm/nouveau/nouveau_gem.c
@@ -172,6 +172,64 @@ nouveau_gem_object_close(struct drm_gem_object *gem, struct
drm_file *file_priv)
 	ttm_bo_unreserve(&nvbo->bo);
 }
 
+extern int nouveau_staging_tiling;
+int
+nouveau_gem_ioctl_set_tiling(struct drm_device *dev, void *data,
+			     struct drm_file *file_priv)
+{
+	struct nouveau_drm *drm = nouveau_drm(dev);
+	struct nouveau_cli *cli = nouveau_cli(file_priv);
+	struct nvkm_fb *pfb = nvxx_fb(&drm->device);
+	struct drm_nouveau_gem_set_tiling *req = data;
+	struct drm_gem_object *gem;
+	struct nouveau_bo *nvbo;
+	struct nvkm_vma *vma;
+	int ret = 0;
+
+	if (!nouveau_staging_tiling)
+		return -EINVAL;
+
+	if (!pfb->memtype_valid(pfb, req->tile_flags)) {
+		NV_PRINTK(error, cli, "bad page flags: 0x%08x\n",
req->tile_flags);
+		return -EINVAL;
+	}
+
+	gem = drm_gem_object_lookup(dev, file_priv, req->handle);
+	if (!gem)
+		return -ENOENT;
+
+	nvbo = nouveau_gem_object(gem);
+
+	/* We can only change tiling on PRIME-imported buffers */
+	if (nvbo->bo.type != ttm_bo_type_sg) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	if (nvbo->tile_mode != req->tile_mode ||
+	    nvbo->tile_flags != req->tile_flags) {
+		ret = ttm_bo_reserve(&nvbo->bo, false, false, false, NULL);
+		if (ret)
+			goto out;
+
+		nvbo->tile_mode = req->tile_mode;
+		nvbo->tile_flags = req->tile_flags;
+
+		nouveau_bo_update_tiling(drm, nvbo, nvbo->bo.mem.mm_node);
+
+		/* remap over existing mapping with new tile parameters */
+		vma = nouveau_bo_vma_find(nvbo, cli->vm);
+		if (vma)
+			nvkm_vm_map(vma, nvbo->bo.mem.mm_node);
+
+		ttm_bo_unreserve(&nvbo->bo);
+	}
+
+out:
+	drm_gem_object_unreference_unlocked(gem);
+	return ret;
+}
+
 int
 nouveau_gem_new(struct drm_device *dev, int size, int align, uint32_t domain,
 		uint32_t tile_mode, uint32_t tile_flags,
diff --git a/drm/nouveau/nouveau_gem.h b/drm/nouveau/nouveau_gem.h
index e4049faca780..56e741d98bcd 100644
--- a/drm/nouveau/nouveau_gem.h
+++ b/drm/nouveau/nouveau_gem.h
@@ -23,6 +23,8 @@ extern void nouveau_gem_object_del(struct drm_gem_object *);
 extern int nouveau_gem_object_open(struct drm_gem_object *, struct drm_file *);
 extern void nouveau_gem_object_close(struct drm_gem_object *,
 				     struct drm_file *);
+extern int nouveau_gem_ioctl_set_tiling(struct drm_device *, void *,
+					struct drm_file *);
 extern int nouveau_gem_ioctl_new(struct drm_device *, void *,
 				 struct drm_file *);
 extern int nouveau_gem_ioctl_pushbuf(struct drm_device *, void *,
diff --git a/drm/nouveau/nouveau_ttm.c b/drm/nouveau/nouveau_ttm.c
index 18f449715788..d680153db6e5 100644
--- a/drm/nouveau/nouveau_ttm.c
+++ b/drm/nouveau/nouveau_ttm.c
@@ -174,18 +174,7 @@ nouveau_gart_manager_new(struct ttm_mem_type_manager *man,
 
 	node->page_shift = 12;
 
-	switch (drm->device.info.family) {
-	case NV_DEVICE_INFO_V0_TESLA:
-		if (drm->device.info.chipset != 0x50)
-			node->memtype = (nvbo->tile_flags & 0x7f00) >> 8;
-		break;
-	case NV_DEVICE_INFO_V0_FERMI:
-	case NV_DEVICE_INFO_V0_KEPLER:
-		node->memtype = (nvbo->tile_flags & 0xff00) >> 8;
-		break;
-	default:
-		break;
-	}
+	nouveau_bo_update_tiling(drm, nvbo, node);
 
 	mem->mm_node = node;
 	mem->start   = 0;
diff --git a/drm/nouveau/uapi/drm/nouveau_drm.h
b/drm/nouveau/uapi/drm/nouveau_drm.h
index 4e7e21f41b5c..8f10b16b1473 100644
--- a/drm/nouveau/uapi/drm/nouveau_drm.h
+++ b/drm/nouveau/uapi/drm/nouveau_drm.h
@@ -64,6 +64,12 @@ struct drm_nouveau_gem_new {
 	uint32_t align;
 };
 
+struct drm_nouveau_gem_set_tiling {
+	uint32_t handle;
+	uint32_t tile_mode;
+	uint32_t tile_flags;
+};
+
 #define NOUVEAU_GEM_MAX_BUFFERS 1024
 struct drm_nouveau_gem_pushbuf_bo_presumed {
 	uint32_t valid;
@@ -142,6 +148,7 @@ struct drm_nouveau_gem_cpu_fini {
 #define DRM_NOUVEAU_GEM_INFO           0x44
 /* range 0x98..DRM_COMMAND_END (8 entries) is reserved for staging, unstable
ioctls */
 #define DRM_NOUVEAU_STAGING_IOCTL      0x58
+#define DRM_NOUVEAU_GEM_SET_TILING     (DRM_NOUVEAU_STAGING_IOCTL + 0x0)
 
 #define DRM_IOCTL_NOUVEAU_GEM_NEW            DRM_IOWR(DRM_COMMAND_BASE +
DRM_NOUVEAU_GEM_NEW, struct drm_nouveau_gem_new)
 #define DRM_IOCTL_NOUVEAU_GEM_PUSHBUF        DRM_IOWR(DRM_COMMAND_BASE +
DRM_NOUVEAU_GEM_PUSHBUF, struct drm_nouveau_gem_pushbuf)
@@ -149,5 +156,6 @@ struct drm_nouveau_gem_cpu_fini {
 #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)
 /* staging ioctls */
+#define DRM_IOCTL_NOUVEAU_GEM_SET_TILING     DRM_IOWR(DRM_COMMAND_BASE +
DRM_NOUVEAU_GEM_SET_TILING, struct drm_nouveau_gem_set_tiling)
 
 #endif /* __NOUVEAU_DRM_H__ */
-- 
2.4.2

Alexandre Courbot

2015-Jun-15 07:15 UTC

head link

[Nouveau] [PATCH v2 2/2] drm/nouveau: add GEM_SET_TILING staging ioctl

On 06/15/2015 04:09 PM, Alexandre Courbot wrote:> From: Ari Hirvonen <ahirvonen at nvidia.com>
>
> Add new NOUVEAU_GEM_SET_TILING ioctl to set correct tiling
> mode for imported dma-bufs. This ioctl is staging for now
> and enabled with the "staging_tiling" module option.
Adding Thierry to the conversation since he knows best about exported 
buffers and attributes. I wonder if this would not better be done at the 
time the buffer gets imported. It seems to me that this would be a more 
appropriate way than having an ioctl dedicated to this. Thierry, would 
you have any input based on your experience with tegradrm? In the end, 
it seems like you have settled for a similar ioctl to set the tiling 
mode of displayed buffers.
>
> Signed-off-by: Ari Hirvonen <ahirvonen at nvidia.com>
> [acourbot at nvidia.com: carry upstream, many fixes]
> Signed-off-by: Alexandre Courbot <acourbot at nvidia.com>
> ---
>   drm/nouveau/nouveau_bo.c           | 18 ++++++++++++
>   drm/nouveau/nouveau_bo.h           |  2 ++
>   drm/nouveau/nouveau_drm.c          |  6 ++++
>   drm/nouveau/nouveau_gem.c          | 58
++++++++++++++++++++++++++++++++++++++
>   drm/nouveau/nouveau_gem.h          |  2 ++
>   drm/nouveau/nouveau_ttm.c          | 13 +--------
>   drm/nouveau/uapi/drm/nouveau_drm.h |  8 ++++++
>   7 files changed, 95 insertions(+), 12 deletions(-)
>
> diff --git a/drm/nouveau/nouveau_bo.c b/drm/nouveau/nouveau_bo.c
> index 6edcce1658b7..2a2ebbeb4fc0 100644
> --- a/drm/nouveau/nouveau_bo.c
> +++ b/drm/nouveau/nouveau_bo.c
> @@ -178,6 +178,24 @@ nouveau_bo_fixup_align(struct nouveau_bo *nvbo, u32
flags,
>   	*size = roundup(*size, PAGE_SIZE);
>   }
>
> +void
> +nouveau_bo_update_tiling(struct nouveau_drm *drm, struct nouveau_bo *nvbo,
> +			 struct nvkm_mem *mem)
> +{
> +	switch (drm->device.info.family) {
> +	case NV_DEVICE_INFO_V0_TESLA:
> +		if (drm->device.info.chipset != 0x50)
> +			mem->memtype = (nvbo->tile_flags & 0x7f00) >> 8;
> +		break;
> +	case NV_DEVICE_INFO_V0_FERMI:
> +	case NV_DEVICE_INFO_V0_KEPLER:
> +		mem->memtype = (nvbo->tile_flags & 0xff00) >> 8;
> +		break;
> +	default:
> +		break;
> +	}
> +}
> +
>   int
>   nouveau_bo_new(struct drm_device *dev, int size, int align,
>   	       uint32_t flags, uint32_t tile_mode, uint32_t tile_flags,
> diff --git a/drm/nouveau/nouveau_bo.h b/drm/nouveau/nouveau_bo.h
> index e42360983229..87d07e3533eb 100644
> --- a/drm/nouveau/nouveau_bo.h
> +++ b/drm/nouveau/nouveau_bo.h
> @@ -69,6 +69,8 @@ nouveau_bo_ref(struct nouveau_bo *ref, struct nouveau_bo
**pnvbo)
>   extern struct ttm_bo_driver nouveau_bo_driver;
>
>   void nouveau_bo_move_init(struct nouveau_drm *);
> +void nouveau_bo_update_tiling(struct nouveau_drm *, struct nouveau_bo *,
> +			      struct nvkm_mem *);
>   int  nouveau_bo_new(struct drm_device *, int size, int align, u32 flags,
>   		    u32 tile_mode, u32 tile_flags, struct sg_table *sg,
>   		    struct reservation_object *robj,
> diff --git a/drm/nouveau/nouveau_drm.c b/drm/nouveau/nouveau_drm.c
> index 28860268cf38..45a2c88ebf8e 100644
> --- a/drm/nouveau/nouveau_drm.c
> +++ b/drm/nouveau/nouveau_drm.c
> @@ -75,6 +75,10 @@ MODULE_PARM_DESC(runpm, "disable (0), force enable
(1), optimus only default (-1
>   int nouveau_runtime_pm = -1;
>   module_param_named(runpm, nouveau_runtime_pm, int, 0400);
>
> +MODULE_PARM_DESC(staging_tiling, "enable staging GEM_SET_TILING
ioctl");
> +int nouveau_staging_tiling = 0;
> +module_param_named(staging_tiling, nouveau_staging_tiling, int, 0600);
> +
>   static struct drm_driver driver_stub;
>   static struct drm_driver driver_pci;
>   static struct drm_driver driver_platform;
> @@ -897,6 +901,7 @@ nouveau_ioctls[] = {
>   	DRM_IOCTL_DEF_DRV(NOUVEAU_GEM_CPU_FINI, nouveau_gem_ioctl_cpu_fini,
DRM_UNLOCKED|DRM_AUTH|DRM_RENDER_ALLOW),
>   	DRM_IOCTL_DEF_DRV(NOUVEAU_GEM_INFO, nouveau_gem_ioctl_info,
DRM_UNLOCKED|DRM_AUTH|DRM_RENDER_ALLOW),
>   	/* Staging ioctls */
> +	DRM_IOCTL_DEF_DRV(NOUVEAU_GEM_SET_TILING, nouveau_gem_ioctl_set_tiling,
DRM_UNLOCKED|DRM_AUTH|DRM_RENDER_ALLOW),
>   };
>
>   long
> @@ -1029,6 +1034,7 @@ static void nouveau_display_options(void)
>   	DRM_DEBUG_DRIVER("... runpm        : %d\n",
nouveau_runtime_pm);
>   	DRM_DEBUG_DRIVER("... vram_pushbuf : %d\n",
nouveau_vram_pushbuf);
>   	DRM_DEBUG_DRIVER("... pstate       : %d\n", nouveau_pstate);
> +	DRM_DEBUG_DRIVER("... staging_tiling: %d\n",
nouveau_staging_tiling);
>   }
>
>   static const struct dev_pm_ops nouveau_pm_ops = {
> diff --git a/drm/nouveau/nouveau_gem.c b/drm/nouveau/nouveau_gem.c
> index 0e690bf19fc9..0e69449798aa 100644
> --- a/drm/nouveau/nouveau_gem.c
> +++ b/drm/nouveau/nouveau_gem.c
> @@ -172,6 +172,64 @@ nouveau_gem_object_close(struct drm_gem_object *gem,
struct drm_file *file_priv)
>   	ttm_bo_unreserve(&nvbo->bo);
>   }
>
> +extern int nouveau_staging_tiling;
> +int
> +nouveau_gem_ioctl_set_tiling(struct drm_device *dev, void *data,
> +			     struct drm_file *file_priv)
> +{
> +	struct nouveau_drm *drm = nouveau_drm(dev);
> +	struct nouveau_cli *cli = nouveau_cli(file_priv);
> +	struct nvkm_fb *pfb = nvxx_fb(&drm->device);
> +	struct drm_nouveau_gem_set_tiling *req = data;
> +	struct drm_gem_object *gem;
> +	struct nouveau_bo *nvbo;
> +	struct nvkm_vma *vma;
> +	int ret = 0;
> +
> +	if (!nouveau_staging_tiling)
> +		return -EINVAL;
> +
> +	if (!pfb->memtype_valid(pfb, req->tile_flags)) {
> +		NV_PRINTK(error, cli, "bad page flags: 0x%08x\n",
req->tile_flags);
> +		return -EINVAL;
> +	}
> +
> +	gem = drm_gem_object_lookup(dev, file_priv, req->handle);
> +	if (!gem)
> +		return -ENOENT;
> +
> +	nvbo = nouveau_gem_object(gem);
> +
> +	/* We can only change tiling on PRIME-imported buffers */
> +	if (nvbo->bo.type != ttm_bo_type_sg) {
> +		ret = -EINVAL;
> +		goto out;
> +	}
> +
> +	if (nvbo->tile_mode != req->tile_mode ||
> +	    nvbo->tile_flags != req->tile_flags) {
> +		ret = ttm_bo_reserve(&nvbo->bo, false, false, false, NULL);
> +		if (ret)
> +			goto out;
> +
> +		nvbo->tile_mode = req->tile_mode;
> +		nvbo->tile_flags = req->tile_flags;
> +
> +		nouveau_bo_update_tiling(drm, nvbo, nvbo->bo.mem.mm_node);
> +
> +		/* remap over existing mapping with new tile parameters */
> +		vma = nouveau_bo_vma_find(nvbo, cli->vm);
> +		if (vma)
> +			nvkm_vm_map(vma, nvbo->bo.mem.mm_node);
> +
> +		ttm_bo_unreserve(&nvbo->bo);
> +	}
> +
> +out:
> +	drm_gem_object_unreference_unlocked(gem);
> +	return ret;
> +}
> +
>   int
>   nouveau_gem_new(struct drm_device *dev, int size, int align, uint32_t
domain,
>   		uint32_t tile_mode, uint32_t tile_flags,
> diff --git a/drm/nouveau/nouveau_gem.h b/drm/nouveau/nouveau_gem.h
> index e4049faca780..56e741d98bcd 100644
> --- a/drm/nouveau/nouveau_gem.h
> +++ b/drm/nouveau/nouveau_gem.h
> @@ -23,6 +23,8 @@ extern void nouveau_gem_object_del(struct drm_gem_object
*);
>   extern int nouveau_gem_object_open(struct drm_gem_object *, struct
drm_file *);
>   extern void nouveau_gem_object_close(struct drm_gem_object *,
>   				     struct drm_file *);
> +extern int nouveau_gem_ioctl_set_tiling(struct drm_device *, void *,
> +					struct drm_file *);
>   extern int nouveau_gem_ioctl_new(struct drm_device *, void *,
>   				 struct drm_file *);
>   extern int nouveau_gem_ioctl_pushbuf(struct drm_device *, void *,
> diff --git a/drm/nouveau/nouveau_ttm.c b/drm/nouveau/nouveau_ttm.c
> index 18f449715788..d680153db6e5 100644
> --- a/drm/nouveau/nouveau_ttm.c
> +++ b/drm/nouveau/nouveau_ttm.c
> @@ -174,18 +174,7 @@ nouveau_gart_manager_new(struct ttm_mem_type_manager
*man,
>
>   	node->page_shift = 12;
>
> -	switch (drm->device.info.family) {
> -	case NV_DEVICE_INFO_V0_TESLA:
> -		if (drm->device.info.chipset != 0x50)
> -			node->memtype = (nvbo->tile_flags & 0x7f00) >> 8;
> -		break;
> -	case NV_DEVICE_INFO_V0_FERMI:
> -	case NV_DEVICE_INFO_V0_KEPLER:
> -		node->memtype = (nvbo->tile_flags & 0xff00) >> 8;
> -		break;
> -	default:
> -		break;
> -	}
> +	nouveau_bo_update_tiling(drm, nvbo, node);
>
>   	mem->mm_node = node;
>   	mem->start   = 0;
> diff --git a/drm/nouveau/uapi/drm/nouveau_drm.h
b/drm/nouveau/uapi/drm/nouveau_drm.h
> index 4e7e21f41b5c..8f10b16b1473 100644
> --- a/drm/nouveau/uapi/drm/nouveau_drm.h
> +++ b/drm/nouveau/uapi/drm/nouveau_drm.h
> @@ -64,6 +64,12 @@ struct drm_nouveau_gem_new {
>   	uint32_t align;
>   };
>
> +struct drm_nouveau_gem_set_tiling {
> +	uint32_t handle;
> +	uint32_t tile_mode;
> +	uint32_t tile_flags;
> +};
> +
>   #define NOUVEAU_GEM_MAX_BUFFERS 1024
>   struct drm_nouveau_gem_pushbuf_bo_presumed {
>   	uint32_t valid;
> @@ -142,6 +148,7 @@ struct drm_nouveau_gem_cpu_fini {
>   #define DRM_NOUVEAU_GEM_INFO           0x44
>   /* range 0x98..DRM_COMMAND_END (8 entries) is reserved for staging,
unstable ioctls */
>   #define DRM_NOUVEAU_STAGING_IOCTL      0x58
> +#define DRM_NOUVEAU_GEM_SET_TILING     (DRM_NOUVEAU_STAGING_IOCTL + 0x0)
>
>   #define DRM_IOCTL_NOUVEAU_GEM_NEW            DRM_IOWR(DRM_COMMAND_BASE +
DRM_NOUVEAU_GEM_NEW, struct drm_nouveau_gem_new)
>   #define DRM_IOCTL_NOUVEAU_GEM_PUSHBUF        DRM_IOWR(DRM_COMMAND_BASE +
DRM_NOUVEAU_GEM_PUSHBUF, struct drm_nouveau_gem_pushbuf)
> @@ -149,5 +156,6 @@ struct drm_nouveau_gem_cpu_fini {
>   #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)
>   /* staging ioctls */
> +#define DRM_IOCTL_NOUVEAU_GEM_SET_TILING     DRM_IOWR(DRM_COMMAND_BASE +
DRM_NOUVEAU_GEM_SET_TILING, struct drm_nouveau_gem_set_tiling)
>
>   #endif /* __NOUVEAU_DRM_H__ */
>

Daniel Vetter

2015-Jun-15 07:56 UTC

head link

[Nouveau] [PATCH v2 2/2] drm/nouveau: add GEM_SET_TILING staging ioctl

On Mon, Jun 15, 2015 at 04:09:29PM +0900, Alexandre Courbot
wrote:> From: Ari Hirvonen <ahirvonen at nvidia.com>
> 
> Add new NOUVEAU_GEM_SET_TILING ioctl to set correct tiling
> mode for imported dma-bufs. This ioctl is staging for now
> and enabled with the "staging_tiling" module option.
> 
> Signed-off-by: Ari Hirvonen <ahirvonen at nvidia.com>
> [acourbot at nvidia.com: carry upstream, many fixes]
> Signed-off-by: Alexandre Courbot <acourbot at nvidia.com>
> ---
>  drm/nouveau/nouveau_bo.c           | 18 ++++++++++++
>  drm/nouveau/nouveau_bo.h           |  2 ++
>  drm/nouveau/nouveau_drm.c          |  6 ++++
>  drm/nouveau/nouveau_gem.c          | 58
++++++++++++++++++++++++++++++++++++++
>  drm/nouveau/nouveau_gem.h          |  2 ++
>  drm/nouveau/nouveau_ttm.c          | 13 +--------
>  drm/nouveau/uapi/drm/nouveau_drm.h |  8 ++++++
>  7 files changed, 95 insertions(+), 12 deletions(-)
> 
> diff --git a/drm/nouveau/nouveau_bo.c b/drm/nouveau/nouveau_bo.c
> index 6edcce1658b7..2a2ebbeb4fc0 100644
> --- a/drm/nouveau/nouveau_bo.c
> +++ b/drm/nouveau/nouveau_bo.c
> @@ -178,6 +178,24 @@ nouveau_bo_fixup_align(struct nouveau_bo *nvbo, u32
flags,
>  	*size = roundup(*size, PAGE_SIZE);
>  }
>  
> +void
> +nouveau_bo_update_tiling(struct nouveau_drm *drm, struct nouveau_bo *nvbo,
> +			 struct nvkm_mem *mem)
> +{
> +	switch (drm->device.info.family) {
> +	case NV_DEVICE_INFO_V0_TESLA:
> +		if (drm->device.info.chipset != 0x50)
> +			mem->memtype = (nvbo->tile_flags & 0x7f00) >> 8;
> +		break;
> +	case NV_DEVICE_INFO_V0_FERMI:
> +	case NV_DEVICE_INFO_V0_KEPLER:
> +		mem->memtype = (nvbo->tile_flags & 0xff00) >> 8;
> +		break;
> +	default:
> +		break;
> +	}
> +}
> +
>  int
>  nouveau_bo_new(struct drm_device *dev, int size, int align,
>  	       uint32_t flags, uint32_t tile_mode, uint32_t tile_flags,
> diff --git a/drm/nouveau/nouveau_bo.h b/drm/nouveau/nouveau_bo.h
> index e42360983229..87d07e3533eb 100644
> --- a/drm/nouveau/nouveau_bo.h
> +++ b/drm/nouveau/nouveau_bo.h
> @@ -69,6 +69,8 @@ nouveau_bo_ref(struct nouveau_bo *ref, struct nouveau_bo
**pnvbo)
>  extern struct ttm_bo_driver nouveau_bo_driver;
>  
>  void nouveau_bo_move_init(struct nouveau_drm *);
> +void nouveau_bo_update_tiling(struct nouveau_drm *, struct nouveau_bo *,
> +			      struct nvkm_mem *);
>  int  nouveau_bo_new(struct drm_device *, int size, int align, u32 flags,
>  		    u32 tile_mode, u32 tile_flags, struct sg_table *sg,
>  		    struct reservation_object *robj,
> diff --git a/drm/nouveau/nouveau_drm.c b/drm/nouveau/nouveau_drm.c
> index 28860268cf38..45a2c88ebf8e 100644
> --- a/drm/nouveau/nouveau_drm.c
> +++ b/drm/nouveau/nouveau_drm.c
> @@ -75,6 +75,10 @@ MODULE_PARM_DESC(runpm, "disable (0), force enable
(1), optimus only default (-1
>  int nouveau_runtime_pm = -1;
>  module_param_named(runpm, nouveau_runtime_pm, int, 0400);
>  
> +MODULE_PARM_DESC(staging_tiling, "enable staging GEM_SET_TILING
ioctl");
> +int nouveau_staging_tiling = 0;
> +module_param_named(staging_tiling, nouveau_staging_tiling, int, 0600);
Please use _unsafe here to make sure that setting this option taints the
kernel and gives at least a bit of a deterrent. But in the end the policy
is still that you can't regress anything if people complain, which means
you might end up with a staging ioctl locked down forever.

The other part I don't like with this plan is that it looks a bit like it
could be easily abused to evade the open source userspace requirement
upstream has for new interfaces. Doesn't help that your first staging
ioctl doesn't come with links to mesa/hwc/whatever patches attached ;-)

Overall I don't think this will help - you need internal branch management
anyway, and upstreaming new ABI is somewhat painful for a reason: Screwing
things up is really expensive long-term, and the drm community has paid
that price a few too many times.

Cheers, Daniel

> +
>  static struct drm_driver driver_stub;
>  static struct drm_driver driver_pci;
>  static struct drm_driver driver_platform;
> @@ -897,6 +901,7 @@ nouveau_ioctls[] = {
>  	DRM_IOCTL_DEF_DRV(NOUVEAU_GEM_CPU_FINI, nouveau_gem_ioctl_cpu_fini,
DRM_UNLOCKED|DRM_AUTH|DRM_RENDER_ALLOW),
>  	DRM_IOCTL_DEF_DRV(NOUVEAU_GEM_INFO, nouveau_gem_ioctl_info,
DRM_UNLOCKED|DRM_AUTH|DRM_RENDER_ALLOW),
>  	/* Staging ioctls */
> +	DRM_IOCTL_DEF_DRV(NOUVEAU_GEM_SET_TILING, nouveau_gem_ioctl_set_tiling,
DRM_UNLOCKED|DRM_AUTH|DRM_RENDER_ALLOW),
>  };
>  
>  long
> @@ -1029,6 +1034,7 @@ static void nouveau_display_options(void)
>  	DRM_DEBUG_DRIVER("... runpm        : %d\n",
nouveau_runtime_pm);
>  	DRM_DEBUG_DRIVER("... vram_pushbuf : %d\n",
nouveau_vram_pushbuf);
>  	DRM_DEBUG_DRIVER("... pstate       : %d\n", nouveau_pstate);
> +	DRM_DEBUG_DRIVER("... staging_tiling: %d\n",
nouveau_staging_tiling);
>  }
>  
>  static const struct dev_pm_ops nouveau_pm_ops = {
> diff --git a/drm/nouveau/nouveau_gem.c b/drm/nouveau/nouveau_gem.c
> index 0e690bf19fc9..0e69449798aa 100644
> --- a/drm/nouveau/nouveau_gem.c
> +++ b/drm/nouveau/nouveau_gem.c
> @@ -172,6 +172,64 @@ nouveau_gem_object_close(struct drm_gem_object *gem,
struct drm_file *file_priv)
>  	ttm_bo_unreserve(&nvbo->bo);
>  }
>  
> +extern int nouveau_staging_tiling;
> +int
> +nouveau_gem_ioctl_set_tiling(struct drm_device *dev, void *data,
> +			     struct drm_file *file_priv)
> +{
> +	struct nouveau_drm *drm = nouveau_drm(dev);
> +	struct nouveau_cli *cli = nouveau_cli(file_priv);
> +	struct nvkm_fb *pfb = nvxx_fb(&drm->device);
> +	struct drm_nouveau_gem_set_tiling *req = data;
> +	struct drm_gem_object *gem;
> +	struct nouveau_bo *nvbo;
> +	struct nvkm_vma *vma;
> +	int ret = 0;
> +
> +	if (!nouveau_staging_tiling)
> +		return -EINVAL;
> +
> +	if (!pfb->memtype_valid(pfb, req->tile_flags)) {
> +		NV_PRINTK(error, cli, "bad page flags: 0x%08x\n",
req->tile_flags);
> +		return -EINVAL;
> +	}
> +
> +	gem = drm_gem_object_lookup(dev, file_priv, req->handle);
> +	if (!gem)
> +		return -ENOENT;
> +
> +	nvbo = nouveau_gem_object(gem);
> +
> +	/* We can only change tiling on PRIME-imported buffers */
> +	if (nvbo->bo.type != ttm_bo_type_sg) {
> +		ret = -EINVAL;
> +		goto out;
> +	}
> +
> +	if (nvbo->tile_mode != req->tile_mode ||
> +	    nvbo->tile_flags != req->tile_flags) {
> +		ret = ttm_bo_reserve(&nvbo->bo, false, false, false, NULL);
> +		if (ret)
> +			goto out;
> +
> +		nvbo->tile_mode = req->tile_mode;
> +		nvbo->tile_flags = req->tile_flags;
> +
> +		nouveau_bo_update_tiling(drm, nvbo, nvbo->bo.mem.mm_node);
> +
> +		/* remap over existing mapping with new tile parameters */
> +		vma = nouveau_bo_vma_find(nvbo, cli->vm);
> +		if (vma)
> +			nvkm_vm_map(vma, nvbo->bo.mem.mm_node);
> +
> +		ttm_bo_unreserve(&nvbo->bo);
> +	}
> +
> +out:
> +	drm_gem_object_unreference_unlocked(gem);
> +	return ret;
> +}
> +
>  int
>  nouveau_gem_new(struct drm_device *dev, int size, int align, uint32_t
domain,
>  		uint32_t tile_mode, uint32_t tile_flags,
> diff --git a/drm/nouveau/nouveau_gem.h b/drm/nouveau/nouveau_gem.h
> index e4049faca780..56e741d98bcd 100644
> --- a/drm/nouveau/nouveau_gem.h
> +++ b/drm/nouveau/nouveau_gem.h
> @@ -23,6 +23,8 @@ extern void nouveau_gem_object_del(struct drm_gem_object
*);
>  extern int nouveau_gem_object_open(struct drm_gem_object *, struct
drm_file *);
>  extern void nouveau_gem_object_close(struct drm_gem_object *,
>  				     struct drm_file *);
> +extern int nouveau_gem_ioctl_set_tiling(struct drm_device *, void *,
> +					struct drm_file *);
>  extern int nouveau_gem_ioctl_new(struct drm_device *, void *,
>  				 struct drm_file *);
>  extern int nouveau_gem_ioctl_pushbuf(struct drm_device *, void *,
> diff --git a/drm/nouveau/nouveau_ttm.c b/drm/nouveau/nouveau_ttm.c
> index 18f449715788..d680153db6e5 100644
> --- a/drm/nouveau/nouveau_ttm.c
> +++ b/drm/nouveau/nouveau_ttm.c
> @@ -174,18 +174,7 @@ nouveau_gart_manager_new(struct ttm_mem_type_manager
*man,
>  
>  	node->page_shift = 12;
>  
> -	switch (drm->device.info.family) {
> -	case NV_DEVICE_INFO_V0_TESLA:
> -		if (drm->device.info.chipset != 0x50)
> -			node->memtype = (nvbo->tile_flags & 0x7f00) >> 8;
> -		break;
> -	case NV_DEVICE_INFO_V0_FERMI:
> -	case NV_DEVICE_INFO_V0_KEPLER:
> -		node->memtype = (nvbo->tile_flags & 0xff00) >> 8;
> -		break;
> -	default:
> -		break;
> -	}
> +	nouveau_bo_update_tiling(drm, nvbo, node);
>  
>  	mem->mm_node = node;
>  	mem->start   = 0;
> diff --git a/drm/nouveau/uapi/drm/nouveau_drm.h
b/drm/nouveau/uapi/drm/nouveau_drm.h
> index 4e7e21f41b5c..8f10b16b1473 100644
> --- a/drm/nouveau/uapi/drm/nouveau_drm.h
> +++ b/drm/nouveau/uapi/drm/nouveau_drm.h
> @@ -64,6 +64,12 @@ struct drm_nouveau_gem_new {
>  	uint32_t align;
>  };
>  
> +struct drm_nouveau_gem_set_tiling {
> +	uint32_t handle;
> +	uint32_t tile_mode;
> +	uint32_t tile_flags;
> +};
> +
>  #define NOUVEAU_GEM_MAX_BUFFERS 1024
>  struct drm_nouveau_gem_pushbuf_bo_presumed {
>  	uint32_t valid;
> @@ -142,6 +148,7 @@ struct drm_nouveau_gem_cpu_fini {
>  #define DRM_NOUVEAU_GEM_INFO           0x44
>  /* range 0x98..DRM_COMMAND_END (8 entries) is reserved for staging,
unstable ioctls */
>  #define DRM_NOUVEAU_STAGING_IOCTL      0x58
> +#define DRM_NOUVEAU_GEM_SET_TILING     (DRM_NOUVEAU_STAGING_IOCTL + 0x0)
>  
>  #define DRM_IOCTL_NOUVEAU_GEM_NEW            DRM_IOWR(DRM_COMMAND_BASE +
DRM_NOUVEAU_GEM_NEW, struct drm_nouveau_gem_new)
>  #define DRM_IOCTL_NOUVEAU_GEM_PUSHBUF        DRM_IOWR(DRM_COMMAND_BASE +
DRM_NOUVEAU_GEM_PUSHBUF, struct drm_nouveau_gem_pushbuf)
> @@ -149,5 +156,6 @@ struct drm_nouveau_gem_cpu_fini {
>  #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)
>  /* staging ioctls */
> +#define DRM_IOCTL_NOUVEAU_GEM_SET_TILING     DRM_IOWR(DRM_COMMAND_BASE +
DRM_NOUVEAU_GEM_SET_TILING, struct drm_nouveau_gem_set_tiling)
>  
>  #endif /* __NOUVEAU_DRM_H__ */
> -- 
> 2.4.2
> 
> _______________________________________________
> Nouveau mailing list
> Nouveau at lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/nouveau
-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch

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