From feb8ef4636a457a1fd916a3ae575f552935e69b9 Mon Sep 17 00:00:00 2001 From: Rob Clark Date: Sun, 29 Jun 2025 13:13:05 -0700 Subject: drm/msm: Add opt-in for VM_BIND Add a SET_PARAM for userspace to request to manage to the VM itself, instead of getting a kernel managed VM. In order to transition to a userspace managed VM, this param must be set before any mappings are created. Signed-off-by: Rob Clark Signed-off-by: Rob Clark Tested-by: Antonino Maniscalco Reviewed-by: Antonino Maniscalco Patchwork: https://patchwork.freedesktop.org/patch/661494/ --- drivers/gpu/drm/msm/msm_gpu.h | 29 +++++++++++++++++++++++++++-- 1 file changed, 27 insertions(+), 2 deletions(-) (limited to 'drivers/gpu/drm/msm/msm_gpu.h') diff --git a/drivers/gpu/drm/msm/msm_gpu.h b/drivers/gpu/drm/msm/msm_gpu.h index 29662742a7e1..b38a33a67ee9 100644 --- a/drivers/gpu/drm/msm/msm_gpu.h +++ b/drivers/gpu/drm/msm/msm_gpu.h @@ -79,7 +79,7 @@ struct msm_gpu_funcs { void (*gpu_set_freq)(struct msm_gpu *gpu, struct dev_pm_opp *opp, bool suspended); struct drm_gpuvm *(*create_vm)(struct msm_gpu *gpu, struct platform_device *pdev); - struct drm_gpuvm *(*create_private_vm)(struct msm_gpu *gpu); + struct drm_gpuvm *(*create_private_vm)(struct msm_gpu *gpu, bool kernel_managed); uint32_t (*get_rptr)(struct msm_gpu *gpu, struct msm_ringbuffer *ring); /** @@ -364,6 +364,14 @@ struct msm_context { */ bool closed; + /** + * @userspace_managed_vm: + * + * Has userspace opted-in to userspace managed VM (ie. VM_BIND) via + * MSM_PARAM_EN_VM_BIND? + */ + bool userspace_managed_vm; + /** * @vm: * @@ -456,6 +464,22 @@ struct msm_context { struct drm_gpuvm *msm_context_vm(struct drm_device *dev, struct msm_context *ctx); +/** + * msm_context_is_vm_bind() - has userspace opted in to VM_BIND? + * + * @ctx: the drm_file context + * + * See MSM_PARAM_EN_VM_BIND. If userspace is managing the VM, it can + * do sparse binding including having multiple, potentially partial, + * mappings in the VM. Therefore certain legacy uabi (ie. GET_IOVA, + * SET_IOVA) are rejected because they don't have a sensible meaning. + */ +static inline bool +msm_context_is_vmbind(struct msm_context *ctx) +{ + return ctx->userspace_managed_vm; +} + /** * msm_gpu_convert_priority - Map userspace priority to ring # and sched priority * @@ -683,7 +707,8 @@ int msm_gpu_init(struct drm_device *drm, struct platform_device *pdev, const char *name, struct msm_gpu_config *config); struct drm_gpuvm * -msm_gpu_create_private_vm(struct msm_gpu *gpu, struct task_struct *task); +msm_gpu_create_private_vm(struct msm_gpu *gpu, struct task_struct *task, + bool kernel_managed); void msm_gpu_cleanup(struct msm_gpu *gpu); -- cgit v1.2.3