[PATCH 177/207] drm/amdgpu: remove unnecessary check for mem train

[Alex Deucher]

From: Likun Gao <Likun.Gao at amd.com>

a.Check whether mem train support when try to reserve related memory.
b.Remove ASIC check and atom firmware table version check as the check
of firmware capability is enough to achieve that purpose.

Signed-off-by: Likun Gao <Likun.Gao at amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu.h           |  4 --
 drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c  |  5 --
 .../gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c  | 47 +------------------
 .../gpu/drm/amd/amdgpu/amdgpu_atomfirmware.h  |  2 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c       |  7 ++-
 5 files changed, 7 insertions(+), 58 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 6e74ff9990e3..a4a0296b168d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -655,10 +655,6 @@ struct amdgpu_fw_vram_usage {
 	u64 size;
 	struct amdgpu_bo *reserved_bo;
 	void *va;
-
-	/* GDDR6 training support flag.
-	*/
-	bool mem_train_support;
 };
 
 /*
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
index fdd52d86a4d7..c687432da426 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
@@ -2022,11 +2022,6 @@ int amdgpu_atombios_init(struct amdgpu_device *adev)
 	if (adev->is_atom_fw) {
 		amdgpu_atomfirmware_scratch_regs_init(adev);
 		amdgpu_atomfirmware_allocate_fb_scratch(adev);
-		ret = amdgpu_atomfirmware_get_mem_train_info(adev);
-		if (ret) {
-			DRM_ERROR("Failed to get mem train fb location.\n");
-			return ret;
-		}
 	} else {
 		amdgpu_atombios_scratch_regs_init(adev);
 		amdgpu_atombios_allocate_fb_scratch(adev);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c
index 2b55ccd5cb44..e249b22fef54 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c
@@ -516,7 +516,7 @@ static bool gddr6_mem_train_vbios_support(struct amdgpu_device *adev)
 	return false;
 }
 
-static int gddr6_mem_train_support(struct amdgpu_device *adev)
+int amdgpu_mem_train_support(struct amdgpu_device *adev)
 {
 	int ret;
 	uint32_t major, minor, revision, hw_v;
@@ -551,51 +551,6 @@ static int gddr6_mem_train_support(struct amdgpu_device *adev)
 	return ret;
 }
 
-int amdgpu_atomfirmware_get_mem_train_info(struct amdgpu_device *adev)
-{
-	struct atom_context *ctx = adev->mode_info.atom_context;
-	int index;
-	uint8_t frev, crev;
-	uint16_t data_offset, size;
-	int ret;
-
-	adev->fw_vram_usage.mem_train_support = false;
-
-	if (adev->asic_type != CHIP_NAVI10 &&
-	    adev->asic_type != CHIP_NAVI14 &&
-	    adev->asic_type != CHIP_SIENNA_CICHLID)
-		return 0;
-
-	if (amdgpu_sriov_vf(adev))
-		return 0;
-
-	ret = gddr6_mem_train_support(adev);
-	if (ret == -1)
-		return -EINVAL;
-	else if (ret == 0)
-		return 0;
-
-	index = get_index_into_master_table(atom_master_list_of_data_tables_v2_1,
-					    vram_usagebyfirmware);
-	ret = amdgpu_atom_parse_data_header(ctx, index, &size, &frev, &crev,
-					    &data_offset);
-	if (ret == 0) {
-		DRM_ERROR("parse data header failed.\n");
-		return -EINVAL;
-	}
-
-	DRM_DEBUG("atom firmware common table header size:0x%04x, frev:0x%02x,"
-		  " crev:0x%02x, data_offset:0x%04x.\n", size, frev, crev, data_offset);
-	/* only support 2.1+ */
-	if (((uint16_t)frev << 8 | crev) < 0x0201) {
-		DRM_ERROR("frev:0x%02x, crev:0x%02x < 2.1 !\n", frev, crev);
-		return -EINVAL;
-	}
-
-	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;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.h
index 3a5ed339903e..9f0d4356e8df 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.h
@@ -31,11 +31,11 @@ void amdgpu_atomfirmware_scratch_regs_init(struct amdgpu_device *adev);
 int amdgpu_atomfirmware_allocate_fb_scratch(struct amdgpu_device *adev);
 int amdgpu_atomfirmware_get_vram_info(struct amdgpu_device *adev,
 	int *vram_width, int *vram_type, int *vram_vendor);
-int amdgpu_atomfirmware_get_mem_train_info(struct amdgpu_device *adev);
 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);
+int amdgpu_mem_train_support(struct amdgpu_device *adev);
 
 #endif
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 12675cb7dde4..d968e38d475b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -1861,10 +1861,13 @@ static int amdgpu_ttm_reserve_tmr(struct amdgpu_device *adev)
 	bool mem_train_support = false;
 
 	if (!amdgpu_sriov_vf(adev)) {
-		if (adev->fw_vram_usage.mem_train_support) {
+		ret = amdgpu_mem_train_support(adev);
+		if (ret == 1) {
 			mem_train_support = true;
 			amdgpu_ttm_training_data_block_init(adev);
-		} else
+		} else if (ret == -1)
+			return -EINVAL;
+		else
 			DRM_DEBUG("memory training does not support!\n");
 	}
 
-- 
2.25.4