From c86cbe6e208d9ca3103827bdf5d32c9e356d98d1 Mon Sep 17 00:00:00 2001
From: Hawking Zhang <Hawking.Zhang@amd.com>
Date: Thu, 23 Jan 2020 04:13:01 +0800
Subject: drm/amdgpu: add atomfirmware helper funciton to query reserved fb
Git-commit: 9a244ebe8128063ca1eaa6597da128b5c1689e3c
Patch-mainline: v5.9-rc1
References: jsc#SLE-12680, jsc#SLE-12880, jsc#SLE-12882, jsc#SLE-12883, jsc#SLE-13496, jsc#SLE-15322
 size

fw_reserved_size_in_kb is introduced for driver to query
the TMR region reserved by PSP BL in Sienna_Cichlid and onwards

Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 .../gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c  | 38 +++++++++++++++++++
 .../gpu/drm/amd/amdgpu/amdgpu_atomfirmware.h  |  1 +
 2 files changed, 39 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c
index 0e66c8bd4a95..2ba918974096 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c
@@ -326,6 +326,9 @@ bool amdgpu_atomfirmware_mem_ecc_supported(struct amdgpu_device *adev)
 
 union firmware_info {
 	struct atom_firmware_info_v3_1 v31;
+	struct atom_firmware_info_v3_2 v32;
+	struct atom_firmware_info_v3_3 v33;
+	struct atom_firmware_info_v3_4 v34;
 };
 
 /*
@@ -591,3 +594,38 @@ int amdgpu_atomfirmware_get_mem_train_info(struct amdgpu_device *adev)
 	adev->fw_vram_usage.mem_train_support = true;
 	return 0;
 }
+
+int amdgpu_atomfirmware_get_fw_reserved_fb_size(struct amdgpu_device *adev)
+{
+	struct atom_context *ctx = adev->mode_info.atom_context;
+	union firmware_info *firmware_info;
+	int index;
+	u16 data_offset, size;
+	u8 frev, crev;
+	int fw_reserved_fb_size;
+
+	index = get_index_into_master_table(atom_master_list_of_data_tables_v2_1,
+			firmwareinfo);
+
+	if (!amdgpu_atom_parse_data_header(ctx, index, &size,
+				&frev, &crev, &data_offset))
+		/* fail to parse data_header */
+		return 0;
+
+	firmware_info = (union firmware_info *)(ctx->bios + data_offset);
+
+	if (frev !=3)
+		return -EINVAL;
+
+	switch (crev) {
+	case 4:
+		fw_reserved_fb_size =
+			(firmware_info->v34.fw_reserved_size_in_kb << 10);
+		break;
+	default:
+		fw_reserved_fb_size = 0;
+		break;
+	}
+
+	return fw_reserved_fb_size;
+}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.h
index 434fe2fa0089..3a5ed339903e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.h
@@ -36,5 +36,6 @@ int amdgpu_atomfirmware_get_clock_info(struct amdgpu_device *adev);
 int amdgpu_atomfirmware_get_gfx_info(struct amdgpu_device *adev);
 bool amdgpu_atomfirmware_mem_ecc_supported(struct amdgpu_device *adev);
 bool amdgpu_atomfirmware_sram_ecc_supported(struct amdgpu_device *adev);
+int amdgpu_atomfirmware_get_fw_reserved_fb_size(struct amdgpu_device *adev);
 
 #endif
-- 
2.29.2