Re: [PATCH 15/19] drm/msm: Add support for private address space instances
On Thu 13 Aug 21:41 CDT 2020, Rob Clark wrote:
> From: Jordan Crouse
>
> Add support for allocating private address space instances. Targets that
> support per-context pagetables should implement their own function to
> allocate private address spaces.
>
> The default will return a pointer to the global address space.
>
Reviewed-by: Bjorn Andersson
> Signed-off-by: Jordan Crouse
> Signed-off-by: Rob Clark
> ---
> drivers/gpu/drm/msm/msm_drv.c | 13 +++--
> drivers/gpu/drm/msm/msm_drv.h | 5 +
> drivers/gpu/drm/msm/msm_gem_vma.c | 9 +
> drivers/gpu/drm/msm/msm_gpu.c | 22 ++
> drivers/gpu/drm/msm/msm_gpu.h | 5 +
> 5 files changed, 48 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
> index 01845a3b8d52..8e70d220bba8 100644
> --- a/drivers/gpu/drm/msm/msm_drv.c
> +++ b/drivers/gpu/drm/msm/msm_drv.c
> @@ -597,7 +597,7 @@ static int context_init(struct drm_device *dev, struct
> drm_file *file)
> kref_init(>ref);
> msm_submitqueue_init(dev, ctx);
>
> - ctx->aspace = priv->gpu ? priv->gpu->aspace : NULL;
> + ctx->aspace = msm_gpu_create_private_address_space(priv->gpu);
> file->driver_priv = ctx;
>
> return 0;
> @@ -780,18 +780,19 @@ static int msm_ioctl_gem_cpu_fini(struct drm_device
> *dev, void *data,
> }
>
> static int msm_ioctl_gem_info_iova(struct drm_device *dev,
> - struct drm_gem_object *obj, uint64_t *iova)
> + struct drm_file *file, struct drm_gem_object *obj,
> + uint64_t *iova)
> {
> - struct msm_drm_private *priv = dev->dev_private;
> + struct msm_file_private *ctx = file->driver_priv;
>
> - if (!priv->gpu)
> + if (!ctx->aspace)
> return -EINVAL;
>
> /*
>* Don't pin the memory here - just get an address so that userspace can
>* be productive
>*/
> - return msm_gem_get_iova(obj, priv->gpu->aspace, iova);
> + return msm_gem_get_iova(obj, ctx->aspace, iova);
> }
>
> static int msm_ioctl_gem_info(struct drm_device *dev, void *data,
> @@ -830,7 +831,7 @@ static int msm_ioctl_gem_info(struct drm_device *dev,
> void *data,
> args->value = msm_gem_mmap_offset(obj);
> break;
> case MSM_INFO_GET_IOVA:
> - ret = msm_ioctl_gem_info_iova(dev, obj, >value);
> + ret = msm_ioctl_gem_info_iova(dev, file, obj, >value);
> break;
> case MSM_INFO_SET_NAME:
> /* length check should leave room for terminating null: */
> diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
> index 4561bfb5e745..2ca9c3c03845 100644
> --- a/drivers/gpu/drm/msm/msm_drv.h
> +++ b/drivers/gpu/drm/msm/msm_drv.h
> @@ -249,6 +249,10 @@ int msm_gem_map_vma(struct msm_gem_address_space *aspace,
> void msm_gem_close_vma(struct msm_gem_address_space *aspace,
> struct msm_gem_vma *vma);
>
> +
> +struct msm_gem_address_space *
> +msm_gem_address_space_get(struct msm_gem_address_space *aspace);
> +
> void msm_gem_address_space_put(struct msm_gem_address_space *aspace);
>
> struct msm_gem_address_space *
> @@ -434,6 +438,7 @@ static inline void __msm_file_private_destroy(struct kref
> *kref)
> struct msm_file_private *ctx = container_of(kref,
> struct msm_file_private, ref);
>
> + msm_gem_address_space_put(ctx->aspace);
> kfree(ctx);
> }
>
> diff --git a/drivers/gpu/drm/msm/msm_gem_vma.c
> b/drivers/gpu/drm/msm/msm_gem_vma.c
> index 5f6a11211b64..29cc1305cf37 100644
> --- a/drivers/gpu/drm/msm/msm_gem_vma.c
> +++ b/drivers/gpu/drm/msm/msm_gem_vma.c
> @@ -27,6 +27,15 @@ void msm_gem_address_space_put(struct
> msm_gem_address_space *aspace)
> kref_put(>kref, msm_gem_address_space_destroy);
> }
>
> +struct msm_gem_address_space *
> +msm_gem_address_space_get(struct msm_gem_address_space *aspace)
> +{
> + if (!IS_ERR_OR_NULL(aspace))
> + kref_get(>kref);
> +
> + return aspace;
> +}
> +
> /* Actually unmap memory for the vma */
> void msm_gem_purge_vma(struct msm_gem_address_space *aspace,
> struct msm_gem_vma *vma)
> diff --git a/drivers/gpu/drm/msm/msm_gpu.c b/drivers/gpu/drm/msm/msm_gpu.c
> index e1a3cbe25a0c..951850804d77 100644
> --- a/drivers/gpu/drm/msm/msm_gpu.c
> +++ b/drivers/gpu/drm/msm/msm_gpu.c
> @@ -823,6 +823,28 @@ static int get_clocks(struct platform_device *pdev,
> struct msm_gpu *gpu)
> return 0;
> }
>
> +/* Return a new address space for a msm_drm_private instance */
> +struct msm_gem_address_space *
> +msm_gpu_create_private_address_space(struct msm_gpu *gpu)
> +{
> + struct msm_gem_address_space *aspace = NULL;
> +
> + if (!gpu)
> + return NULL;
> +
> + /*
> + * If the target doesn't support private address spaces then return
> + * the global one
> + */
> + if
[PATCH 15/19] drm/msm: Add support for private address space instances
From: Jordan Crouse
Add support for allocating private address space instances. Targets that
support per-context pagetables should implement their own function to
allocate private address spaces.
The default will return a pointer to the global address space.
Signed-off-by: Jordan Crouse
Signed-off-by: Rob Clark
---
drivers/gpu/drm/msm/msm_drv.c | 13 +++--
drivers/gpu/drm/msm/msm_drv.h | 5 +
drivers/gpu/drm/msm/msm_gem_vma.c | 9 +
drivers/gpu/drm/msm/msm_gpu.c | 22 ++
drivers/gpu/drm/msm/msm_gpu.h | 5 +
5 files changed, 48 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index 01845a3b8d52..8e70d220bba8 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -597,7 +597,7 @@ static int context_init(struct drm_device *dev, struct
drm_file *file)
kref_init(>ref);
msm_submitqueue_init(dev, ctx);
- ctx->aspace = priv->gpu ? priv->gpu->aspace : NULL;
+ ctx->aspace = msm_gpu_create_private_address_space(priv->gpu);
file->driver_priv = ctx;
return 0;
@@ -780,18 +780,19 @@ static int msm_ioctl_gem_cpu_fini(struct drm_device *dev,
void *data,
}
static int msm_ioctl_gem_info_iova(struct drm_device *dev,
- struct drm_gem_object *obj, uint64_t *iova)
+ struct drm_file *file, struct drm_gem_object *obj,
+ uint64_t *iova)
{
- struct msm_drm_private *priv = dev->dev_private;
+ struct msm_file_private *ctx = file->driver_priv;
- if (!priv->gpu)
+ if (!ctx->aspace)
return -EINVAL;
/*
* Don't pin the memory here - just get an address so that userspace can
* be productive
*/
- return msm_gem_get_iova(obj, priv->gpu->aspace, iova);
+ return msm_gem_get_iova(obj, ctx->aspace, iova);
}
static int msm_ioctl_gem_info(struct drm_device *dev, void *data,
@@ -830,7 +831,7 @@ static int msm_ioctl_gem_info(struct drm_device *dev, void
*data,
args->value = msm_gem_mmap_offset(obj);
break;
case MSM_INFO_GET_IOVA:
- ret = msm_ioctl_gem_info_iova(dev, obj, >value);
+ ret = msm_ioctl_gem_info_iova(dev, file, obj, >value);
break;
case MSM_INFO_SET_NAME:
/* length check should leave room for terminating null: */
diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
index 4561bfb5e745..2ca9c3c03845 100644
--- a/drivers/gpu/drm/msm/msm_drv.h
+++ b/drivers/gpu/drm/msm/msm_drv.h
@@ -249,6 +249,10 @@ int msm_gem_map_vma(struct msm_gem_address_space *aspace,
void msm_gem_close_vma(struct msm_gem_address_space *aspace,
struct msm_gem_vma *vma);
+
+struct msm_gem_address_space *
+msm_gem_address_space_get(struct msm_gem_address_space *aspace);
+
void msm_gem_address_space_put(struct msm_gem_address_space *aspace);
struct msm_gem_address_space *
@@ -434,6 +438,7 @@ static inline void __msm_file_private_destroy(struct kref
*kref)
struct msm_file_private *ctx = container_of(kref,
struct msm_file_private, ref);
+ msm_gem_address_space_put(ctx->aspace);
kfree(ctx);
}
diff --git a/drivers/gpu/drm/msm/msm_gem_vma.c
b/drivers/gpu/drm/msm/msm_gem_vma.c
index 5f6a11211b64..29cc1305cf37 100644
--- a/drivers/gpu/drm/msm/msm_gem_vma.c
+++ b/drivers/gpu/drm/msm/msm_gem_vma.c
@@ -27,6 +27,15 @@ void msm_gem_address_space_put(struct msm_gem_address_space
*aspace)
kref_put(>kref, msm_gem_address_space_destroy);
}
+struct msm_gem_address_space *
+msm_gem_address_space_get(struct msm_gem_address_space *aspace)
+{
+ if (!IS_ERR_OR_NULL(aspace))
+ kref_get(>kref);
+
+ return aspace;
+}
+
/* Actually unmap memory for the vma */
void msm_gem_purge_vma(struct msm_gem_address_space *aspace,
struct msm_gem_vma *vma)
diff --git a/drivers/gpu/drm/msm/msm_gpu.c b/drivers/gpu/drm/msm/msm_gpu.c
index e1a3cbe25a0c..951850804d77 100644
--- a/drivers/gpu/drm/msm/msm_gpu.c
+++ b/drivers/gpu/drm/msm/msm_gpu.c
@@ -823,6 +823,28 @@ static int get_clocks(struct platform_device *pdev, struct
msm_gpu *gpu)
return 0;
}
+/* Return a new address space for a msm_drm_private instance */
+struct msm_gem_address_space *
+msm_gpu_create_private_address_space(struct msm_gpu *gpu)
+{
+ struct msm_gem_address_space *aspace = NULL;
+
+ if (!gpu)
+ return NULL;
+
+ /*
+* If the target doesn't support private address spaces then return
+* the global one
+*/
+ if (gpu->funcs->create_private_address_space)
+ aspace = gpu->funcs->create_private_address_space(gpu);
+
+ if (IS_ERR_OR_NULL(aspace))
+ aspace = msm_gem_address_space_get(gpu->aspace);
+
+ return aspace;
+}
+
int msm_gpu_init(struct
