linux-kernel - Re: [PATCH v36 4/4] scsi: ufs: Add HPB 2.0 support

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Message-ID: <b64cf2a49a1b43f09961eb4d5d4ea5c2@sk.com>
Date:   Thu, 10 Jun 2021 02:12:27 +0000
From:   정요한(JOUNG YOHAN) Mobile SE 
        <yohan.joung@...com>
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Subject: Re: [PATCH v36 4/4] scsi: ufs: Add HPB 2.0 support

diff --git a/drivers/scsi/ufs/ufshpb.h b/drivers/scsi/ufs/ufshpb.h index 6e6a0252dc15..b1128b0ce486 100644
--- a/drivers/scsi/ufs/ufshpb.h
+++ b/drivers/scsi/ufs/ufshpb.h
@@ -30,19 +30,29 @@
 #define PINNED_NOT_SET				U32_MAX
 
 /* hpb support chunk size */
-#define HPB_MULTI_CHUNK_HIGH			1
+#define HPB_LEGACY_CHUNK_HIGH			1
+#define HPB_MULTI_CHUNK_LOW			7
+#define HPB_MULTI_CHUNK_HIGH			128
 
According to the JEDEC spec, bMAX_DATA_SIZE_FOR_HPB_SINGLE_CMD can be set from 4kb to 1024kb. 
The transfer length should be provided up to 1020kb or 1024kb.
Why did you set HPB_MULTI_CHUNK_HIGH to 128? 
It can sends the hpb command up to 512kb. 
This doesn't seem to match the specs.

Thanks
Yohan.