For passing flags (e.g. SVM) when creating a context.
Signed-off-by: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/i915_dma.c | 1 +
drivers/gpu/drm/i915/i915_drv.h | 2 ++
drivers/gpu/drm/i915/i915_gem_context.c | 63 +++++++++++++++++++++++++++------
include/uapi/drm/i915_drm.h | 18 ++++++++++
4 files changed, 73 insertions(+), 11 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index f0eaa6f..b868084 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -1300,6 +1300,7 @@ const struct drm_ioctl_desc i915_ioctls[] = {
DRM_IOCTL_DEF_DRV(I915_GEM_USERPTR, i915_gem_userptr_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_GETPARAM, i915_gem_context_getparam_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_SETPARAM, i915_gem_context_setparam_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
+ DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_CREATE2, i915_gem_context_create2_ioctl, DRM_UNLOCKED),
};
int i915_max_ioctl = ARRAY_SIZE(i915_ioctls);
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 1287007..20beb51 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -3139,6 +3139,8 @@ static inline bool i915_gem_context_is_default(const struct intel_context *c)
int i915_gem_context_create_ioctl(struct drm_device *dev, void *data,
struct drm_file *file);
+int i915_gem_context_create2_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file);
int i915_gem_context_destroy_ioctl(struct drm_device *dev, void *data,
struct drm_file *file);
int i915_gem_context_getparam_ioctl(struct drm_device *dev, void *data,
diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index 74aa0c9..e9ec2f3 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -238,14 +238,18 @@ err_out:
*/
static struct intel_context *
i915_gem_create_context(struct drm_device *dev,
- struct drm_i915_file_private *file_priv)
+ struct drm_i915_file_private *file_priv, u32 flags)
{
const bool is_global_default_ctx = file_priv == NULL;
struct intel_context *ctx;
+ bool create_vm = false;
int ret = 0;
BUG_ON(!mutex_is_locked(&dev->struct_mutex));
+ if (flags & (I915_GEM_CONTEXT_FULL_PPGTT | I915_GEM_CONTEXT_ENABLE_SVM))
+ create_vm = true;
+
ctx = __create_hw_context(dev, file_priv);
if (IS_ERR(ctx))
return ctx;
@@ -266,7 +270,7 @@ i915_gem_create_context(struct drm_device *dev,
}
}
- if (USES_FULL_PPGTT(dev)) {
+ if (create_vm) {
struct i915_hw_ppgtt *ppgtt = i915_ppgtt_create(dev, file_priv);
if (IS_ERR_OR_NULL(ppgtt)) {
@@ -325,6 +329,7 @@ int i915_gem_context_init(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_context *ctx;
+ u32 flags = 0;
int i;
/* Init should only be called once per module load. Eventually the
@@ -352,7 +357,10 @@ int i915_gem_context_init(struct drm_device *dev)
}
}
- ctx = i915_gem_create_context(dev, NULL);
+ if (USES_FULL_PPGTT(dev))
+ flags |= I915_GEM_CONTEXT_FULL_PPGTT;
+
+ ctx = i915_gem_create_context(dev, NULL, flags);
if (IS_ERR(ctx)) {
DRM_ERROR("Failed to create default global context (error %ld)\n",
PTR_ERR(ctx));
@@ -452,7 +460,8 @@ int i915_gem_context_open(struct drm_device *dev, struct drm_file *file)
idr_init(&file_priv->context_idr);
mutex_lock(&dev->struct_mutex);
- ctx = i915_gem_create_context(dev, file_priv);
+ ctx = i915_gem_create_context(dev, file_priv, USES_FULL_PPGTT(dev) ?
+ I915_GEM_CONTEXT_FULL_PPGTT : 0);
mutex_unlock(&dev->struct_mutex);
if (IS_ERR(ctx)) {
@@ -820,13 +829,15 @@ static bool contexts_enabled(struct drm_device *dev)
return i915.enable_execlists || to_i915(dev)->hw_context_size;
}
-int i915_gem_context_create_ioctl(struct drm_device *dev, void *data,
+int i915_gem_context_create2_ioctl(struct drm_device *dev, void *data,
struct drm_file *file)
{
- struct drm_i915_gem_context_create *args = data;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct drm_i915_gem_context_create2 *args = data;
struct drm_i915_file_private *file_priv = file->driver_priv;
struct intel_context *ctx;
- int ret;
+ u32 flags = args->flags;
+ int ret = 0;
if (!contexts_enabled(dev))
return -ENODEV;
@@ -835,14 +846,44 @@ int i915_gem_context_create_ioctl(struct drm_device *dev, void *data,
if (ret)
return ret;
- ctx = i915_gem_create_context(dev, file_priv);
- mutex_unlock(&dev->struct_mutex);
- if (IS_ERR(ctx))
- return PTR_ERR(ctx);
+ if (USES_FULL_PPGTT(dev))
+ flags |= I915_GEM_CONTEXT_FULL_PPGTT;
+
+ if ((flags & I915_GEM_CONTEXT_ENABLE_SVM) &&
+ !dev_priv->svm.svm_available) {
+ ret = -ENODEV;
+ goto out_unlock;
+ }
+
+ ctx = i915_gem_create_context(dev, file_priv, flags);
+ if (IS_ERR(ctx)) {
+ ret = PTR_ERR(ctx);
+ goto out_unlock;
+ }
args->ctx_id = ctx->user_handle;
DRM_DEBUG_DRIVER("HW context %d created\n", args->ctx_id);
+out_unlock:
+ mutex_unlock(&dev->struct_mutex);
+ return ret;
+}
+
+int i915_gem_context_create_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file)
+{
+ struct drm_i915_gem_context_create *args = data;
+ struct drm_i915_gem_context_create2 tmp;
+ int ret;
+
+ tmp.flags = 0;
+
+ ret = i915_gem_context_create2_ioctl(dev, &tmp, file);
+ if (ret)
+ return ret;
+
+ args->ctx_id = tmp.ctx_id;
+
return 0;
}
diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h
index fd5aa47..bac2fb2 100644
--- a/include/uapi/drm/i915_drm.h
+++ b/include/uapi/drm/i915_drm.h
@@ -230,6 +230,7 @@ typedef struct _drm_i915_sarea {
#define DRM_I915_GEM_USERPTR 0x33
#define DRM_I915_GEM_CONTEXT_GETPARAM 0x34
#define DRM_I915_GEM_CONTEXT_SETPARAM 0x35
+#define DRM_I915_GEM_CONTEXT_CREATE2 0x36
#define DRM_IOCTL_I915_INIT DRM_IOW( DRM_COMMAND_BASE + DRM_I915_INIT, drm_i915_init_t)
#define DRM_IOCTL_I915_FLUSH DRM_IO ( DRM_COMMAND_BASE + DRM_I915_FLUSH)
@@ -283,6 +284,7 @@ typedef struct _drm_i915_sarea {
#define DRM_IOCTL_I915_GEM_USERPTR DRM_IOWR (DRM_COMMAND_BASE + DRM_I915_GEM_USERPTR, struct drm_i915_gem_userptr)
#define DRM_IOCTL_I915_GEM_CONTEXT_GETPARAM DRM_IOWR (DRM_COMMAND_BASE + DRM_I915_GEM_CONTEXT_GETPARAM, struct drm_i915_gem_context_param)
#define DRM_IOCTL_I915_GEM_CONTEXT_SETPARAM DRM_IOWR (DRM_COMMAND_BASE + DRM_I915_GEM_CONTEXT_SETPARAM, struct drm_i915_gem_context_param)
+#define DRM_IOCTL_I915_GEM_CONTEXT_CREATE2 DRM_IOWR (DRM_COMMAND_BASE + DRM_I915_GEM_CONTEXT_CREATE2, struct drm_i915_gem_context_create2)
/* Allow drivers to submit batchbuffers directly to hardware, relying
* on the security mechanisms provided by hardware.
@@ -1072,6 +1074,22 @@ struct drm_i915_gem_context_create {
__u32 pad;
};
+/*
+ * SVM handling
+ *
+ * A context can opt in to SVM support (thereby using its CPU page tables
+ * when accessing data from the GPU) by using the %I915_ENABLE_SVM flag
+ * and passing an existing context id. This is a one way transition; SVM
+ * contexts can not be downgraded into PPGTT contexts once converted.
+ */
+#define I915_GEM_CONTEXT_ENABLE_SVM (1<<0)
+#define I915_GEM_CONTEXT_FULL_PPGTT (1<<1)
+struct drm_i915_gem_context_create2 {
+ /* output: id of new context*/
+ __u32 ctx_id;
+ __u32 flags;
+};
+
struct drm_i915_gem_context_destroy {
__u32 ctx_id;
__u32 pad;
--
1.9.1
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