Commit 90d2c87f authored by Rob Clark's avatar Rob Clark Committed by Dmitry Baryshkov
Browse files

drm/msm: Add MSM_INFO_GET_FLAGS 



In some cases crosvm needs a way to query the cache flags to communicate
them to the guest kernel for guest userspace mapping.

Signed-off-by: default avatarRob Clark <robdclark@chromium.org>
Reviewed-by: default avatarDmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/504453/
Link: https://lore.kernel.org/r/20220923173307.2429872-1-robdclark@gmail.com


Signed-off-by: default avatarDmitry Baryshkov <dmitry.baryshkov@linaro.org>
parent 92bab914

drivers/gpu/drm/msm/msm_drv.c

+10 −0
Original line number Diff line number Diff line
@@ -819,6 +819,7 @@ static int msm_ioctl_gem_info(struct drm_device *dev, void *data, 
	case MSM_INFO_GET_OFFSET:

	case MSM_INFO_GET_IOVA:

	case MSM_INFO_SET_IOVA:

	case MSM_INFO_GET_FLAGS:

		/* value returned as immediate, not pointer, so len==0: */

		if (args->len)

			return -EINVAL;
@@ -846,6 +847,15 @@ static int msm_ioctl_gem_info(struct drm_device *dev, void *data, 
	case MSM_INFO_SET_IOVA:

		ret = msm_ioctl_gem_info_set_iova(dev, file, obj, args->value);

		break;

	case MSM_INFO_GET_FLAGS:

		if (obj->import_attach) {

			ret = -EINVAL;

			break;

		}

		/* Hide internal kernel-only flags: */

		args->value = to_msm_bo(obj)->flags & MSM_BO_FLAGS;

		ret = 0;

		break;

	case MSM_INFO_SET_NAME:

		/* length check should leave room for terminating null: */

		if (args->len >= sizeof(msm_obj->name)) {

include/uapi/drm/msm_drm.h

+1 −0
Original line number Diff line number Diff line
@@ -138,6 +138,7 @@ struct drm_msm_gem_new { 
#define MSM_INFO_SET_NAME	0x02   /* set the debug name (by pointer) */

#define MSM_INFO_GET_NAME	0x03   /* get debug name, returned by pointer */

#define MSM_INFO_SET_IOVA	0x04   /* set the iova, passed by value */

#define MSM_INFO_GET_FLAGS	0x05   /* get the MSM_BO_x flags */



struct drm_msm_gem_info {

	__u32 handle;         /* in */