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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: Rob Clark <robdclark@chromium.org> Reviewed-by: Dmitry 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: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
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@ -819,6 +819,7 @@ static int msm_ioctl_gem_info(struct drm_device *dev, void *data,
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case MSM_INFO_GET_OFFSET:
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case MSM_INFO_GET_IOVA:
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case MSM_INFO_SET_IOVA:
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case MSM_INFO_GET_FLAGS:
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/* value returned as immediate, not pointer, so len==0: */
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if (args->len)
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return -EINVAL;
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@ -846,6 +847,15 @@ static int msm_ioctl_gem_info(struct drm_device *dev, void *data,
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case MSM_INFO_SET_IOVA:
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ret = msm_ioctl_gem_info_set_iova(dev, file, obj, args->value);
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break;
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case MSM_INFO_GET_FLAGS:
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if (obj->import_attach) {
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ret = -EINVAL;
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break;
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}
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/* Hide internal kernel-only flags: */
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args->value = to_msm_bo(obj)->flags & MSM_BO_FLAGS;
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ret = 0;
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break;
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case MSM_INFO_SET_NAME:
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/* length check should leave room for terminating null: */
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if (args->len >= sizeof(msm_obj->name)) {
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@ -138,6 +138,7 @@ struct drm_msm_gem_new {
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#define MSM_INFO_SET_NAME 0x02 /* set the debug name (by pointer) */
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#define MSM_INFO_GET_NAME 0x03 /* get debug name, returned by pointer */
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#define MSM_INFO_SET_IOVA 0x04 /* set the iova, passed by value */
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#define MSM_INFO_GET_FLAGS 0x05 /* get the MSM_BO_x flags */
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struct drm_msm_gem_info {
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__u32 handle; /* in */
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