From: Alex Deucher <alexander.deucher@amd.com>
Date: Fri, 10 Oct 2025 20:47:02 +0000 (-0400)
Subject: drm/amdgpu: Update AMDGPU_INFO_UQ_FW_AREAS query for sdma
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0030595c3e8b48b32a12b8354ce9dbe00efd632f;p=thirdparty%2Fkernel%2Flinux.git

drm/amdgpu: Update AMDGPU_INFO_UQ_FW_AREAS query for sdma

Add a query for sdma queues.  Userspace can use this to
query the size of the CSA buffers for sdma user queues.

Proposed userspace:
https://gitlab.freedesktop.org/yogeshmohan/mesa/-/commits/userq_query

Reviewed-by: Prike Liang <Prike.Liang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
index b02da84ab99d..36fdd1af9d6b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
@@ -409,6 +409,24 @@ static int amdgpu_userq_metadata_info_compute(struct amdgpu_device *adev,
 	return ret;
 }
 
+static int amdgpu_userq_metadata_info_sdma(struct amdgpu_device *adev,
+					   struct drm_amdgpu_info *info,
+					   struct drm_amdgpu_info_uq_metadata_sdma *meta)
+{
+	int ret = -EOPNOTSUPP;
+
+	if (adev->sdma.get_csa_info) {
+		struct amdgpu_sdma_csa_info csa = {};
+
+		adev->sdma.get_csa_info(adev, &csa);
+		meta->csa_size = csa.size;
+		meta->csa_alignment = csa.alignment;
+		ret = 0;
+	}
+
+	return ret;
+}
+
 static int amdgpu_hw_ip_info(struct amdgpu_device *adev,
 			     struct drm_amdgpu_info *info,
 			     struct drm_amdgpu_info_hw_ip *result)
@@ -1386,6 +1404,14 @@ out:
 			if (ret)
 				return ret;
 
+			ret = copy_to_user(out, &meta_info,
+						min((size_t)size, sizeof(meta_info))) ? -EFAULT : 0;
+			return 0;
+		case AMDGPU_HW_IP_DMA:
+			ret = amdgpu_userq_metadata_info_sdma(adev, info, &meta_info.sdma);
+			if (ret)
+				return ret;
+
 			ret = copy_to_user(out, &meta_info,
 						min((size_t)size, sizeof(meta_info))) ? -EFAULT : 0;
 			return 0;
diff --git a/include/uapi/drm/amdgpu_drm.h b/include/uapi/drm/amdgpu_drm.h
index 138d9ae1aa48..f902add31fc6 100644
--- a/include/uapi/drm/amdgpu_drm.h
+++ b/include/uapi/drm/amdgpu_drm.h
@@ -1637,10 +1637,18 @@ struct drm_amdgpu_info_uq_metadata_compute {
 	__u32 eop_alignment;
 };
 
+struct drm_amdgpu_info_uq_metadata_sdma {
+	/* context save area size for sdma6 */
+	__u32 csa_size;
+	/* context save area base virtual alignment for sdma6 */
+	__u32 csa_alignment;
+};
+
 struct drm_amdgpu_info_uq_metadata {
 	union {
 		struct drm_amdgpu_info_uq_metadata_gfx gfx;
 		struct drm_amdgpu_info_uq_metadata_compute compute;
+		struct drm_amdgpu_info_uq_metadata_sdma sdma;
 	};
 };