drm/amdgpu: update the method to get fb_loc of memory training(V4)

The method of getting fb_loc changed from parsing VBIOS to
taking certain offset from top of VRAM

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Tianci.Yin <tianci.yin@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index cd3ca97..f42e8d4 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -636,9 +636,8 @@ struct amdgpu_fw_vram_usage {
        struct amdgpu_bo *reserved_bo;
        void *va;
 
-       /* Offset on the top of VRAM, used as c2p write buffer.
+       /* GDDR6 training support flag.
        */
-       u64 mem_train_fb_loc;
        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 9ba80d8..fdd52d8 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
@@ -2022,7 +2022,7 @@ 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_fb_loc(adev);
+               ret = amdgpu_atomfirmware_get_mem_train_info(adev);
                if (ret) {
                        DRM_ERROR("Failed to get mem train fb location.\n");
                        return ret;

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c
index ff4eb96..58f9d8c 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c
@@ -525,16 +525,12 @@ static int gddr6_mem_train_support(struct amdgpu_device *adev)
        return ret;
 }
 
-int amdgpu_atomfirmware_get_mem_train_fb_loc(struct amdgpu_device *adev)
+int amdgpu_atomfirmware_get_mem_train_info(struct amdgpu_device *adev)
 {
        struct atom_context *ctx = adev->mode_info.atom_context;
-       unsigned char *bios = ctx->bios;
-       struct vram_reserve_block *reserved_block;
-       int index, block_number;
+       int index;
        uint8_t frev, crev;
        uint16_t data_offset, size;
-       uint32_t start_address_in_kb;
-       uint64_t offset;
        int ret;
 
        adev->fw_vram_usage.mem_train_support = false;
@@ -569,32 +565,6 @@ int amdgpu_atomfirmware_get_mem_train_fb_loc(struct amdgpu_device *adev)
                return -EINVAL;
        }
 
-       reserved_block = (struct vram_reserve_block *)
-               (bios + data_offset + sizeof(struct atom_common_table_header));
-       block_number = ((unsigned int)size - sizeof(struct atom_common_table_header))
-               / sizeof(struct vram_reserve_block);
-       reserved_block += (block_number > 0) ? block_number-1 : 0;
-       DRM_DEBUG("block_number:0x%04x, last block: 0x%08xkb sz, %dkb fw, %dkb drv.\n",
-                 block_number,
-                 le32_to_cpu(reserved_block->start_address_in_kb),
-                 le16_to_cpu(reserved_block->used_by_firmware_in_kb),
-                 le16_to_cpu(reserved_block->used_by_driver_in_kb));
-       if (reserved_block->used_by_firmware_in_kb > 0) {
-               start_address_in_kb = le32_to_cpu(reserved_block->start_address_in_kb);
-               offset = (uint64_t)start_address_in_kb * ONE_KiB;
-               if ((offset & (ONE_MiB - 1)) < (4 * ONE_KiB + 1) ) {
-                       offset -= ONE_MiB;
-               }
-
-               offset &= ~(ONE_MiB - 1);
-               adev->fw_vram_usage.mem_train_fb_loc = offset;
-               adev->fw_vram_usage.mem_train_support = true;
-               DRM_DEBUG("mem_train_fb_loc:0x%09llx.\n", offset);
-               ret = 0;
-       } else {
-               DRM_ERROR("used_by_firmware_in_kb is 0!\n");
-               ret = -EINVAL;
-       }
-
-       return ret;
+       adev->fw_vram_usage.mem_train_support = true;
+       return 0;
 }

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.h
index f871af5..434fe2f 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.h
@@ -31,7 +31,7 @@ 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_fb_loc(struct amdgpu_device *adev);
+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);

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index fbf2961..37b027f 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -1720,6 +1720,14 @@ static int amdgpu_ttm_training_reserve_vram_fini(struct amdgpu_device *adev)
        return 0;
 }
 
+static u64 amdgpu_ttm_training_get_c2p_offset(u64 vram_size)
+{
+       if ((vram_size & (ONE_MiB - 1)) < (4 * ONE_KiB + 1) )
+               vram_size -= ONE_MiB;
+
+       return ALIGN(vram_size, ONE_MiB);
+}
+
 /**
  * amdgpu_ttm_training_reserve_vram_init - create bo vram reservation from memory training
  *
@@ -1738,7 +1746,7 @@ static int amdgpu_ttm_training_reserve_vram_init(struct amdgpu_device *adev)
                return 0;
        }
 
-       ctx->c2p_train_data_offset = adev->fw_vram_usage.mem_train_fb_loc;
+       ctx->c2p_train_data_offset = amdgpu_ttm_training_get_c2p_offset(adev->gmc.mc_vram_size);
        ctx->p2c_train_data_offset = (adev->gmc.mc_vram_size - GDDR6_MEM_TRAINING_OFFSET);
        ctx->train_data_size = GDDR6_MEM_TRAINING_DATA_SIZE_IN_BYTES;
 

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
index 0dddedc..e871528 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
@@ -66,6 +66,13 @@ struct amdgpu_copy_mem {
        unsigned long                   offset;
 };
 
+/* Definitions for constance */
+enum amdgpu_internal_constants
+{
+       ONE_KiB = 0x400,
+       ONE_MiB = 0x100000,
+};
+
 extern const struct ttm_mem_type_manager_func amdgpu_gtt_mgr_func;
 extern const struct ttm_mem_type_manager_func amdgpu_vram_mgr_func;
 

diff --git a/drivers/gpu/drm/amd/include/atomfirmware.h b/drivers/gpu/drm/amd/include/atomfirmware.h
index dd7cbc0..7014651 100644 (file)
--- a/drivers/gpu/drm/amd/include/atomfirmware.h
+++ b/drivers/gpu/drm/amd/include/atomfirmware.h
@@ -672,20 +672,6 @@ struct vram_usagebyfirmware_v2_1
   uint16_t  used_by_driver_in_kb; 
 };
 
-/* This is part of vram_usagebyfirmware_v2_1 */
-struct vram_reserve_block
-{
-       uint32_t start_address_in_kb;
-       uint16_t used_by_firmware_in_kb;
-       uint16_t used_by_driver_in_kb;
-};
-
-/* Definitions for constance */
-enum atomfirmware_internal_constants
-{
-       ONE_KiB = 0x400,
-       ONE_MiB = 0x100000,
-};
 
 /* 
   ***************************************************************************