From: Lijo Lazar <lijo.lazar@amd.com>
Date: Fri, 27 Mar 2026 07:43:00 +0000 (+0530)
Subject: drm/amd/pm: Add smu vram copy function
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=f2275ea90be581f599e7c88a9dbfc5dd4383087d;p=thirdparty%2Flinux.git

drm/amd/pm: Add smu vram copy function

Add a wrapper function for copying data/to from vram. This additionally
checks for any RAS fatal error. Copy cannot be trusted if any RAS fatal
error happened as VRAM becomes inaccessible.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Asad Kamal <asad.kamal@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c b/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c
index 7bd8c435466a1..006ef585a377f 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c
@@ -1104,6 +1104,18 @@ int smu_cmn_update_table(struct smu_context *smu,
 	return 0;
 }
 
+int smu_cmn_vram_cpy(struct smu_context *smu, void *dst, const void *src,
+		     size_t len)
+{
+	memcpy(dst, src, len);
+
+	/* Don't trust the copy operation if RAS fatal error happened. */
+	if (amdgpu_ras_get_fed_status(smu->adev))
+		return -EHWPOISON;
+
+	return 0;
+}
+
 int smu_cmn_write_watermarks_table(struct smu_context *smu)
 {
 	void *watermarks_table = smu->smu_table.watermarks_table;
diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.h b/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.h
index b76e86df5da78..d129907535bd0 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.h
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.h
@@ -174,6 +174,9 @@ int smu_cmn_update_table(struct smu_context *smu,
 			 void *table_data,
 			 bool drv2smu);
 
+int smu_cmn_vram_cpy(struct smu_context *smu, void *dst,
+		     const void *src, size_t len);
+
 int smu_cmn_write_watermarks_table(struct smu_context *smu);
 
 int smu_cmn_write_pptable(struct smu_context *smu);