76 lines
2.5 KiB
Diff
76 lines
2.5 KiB
Diff
From 188031fc5d10d4b702e33dc1b062f9ffe4a27974 Mon Sep 17 00:00:00 2001
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From: Luo Jiaxing <luojiaxing@huawei.com>
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Date: Tue, 1 Sep 2020 19:13:07 +0800
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Subject: [PATCH 055/108] scsi: hisi_sas: Add BIST support for phy FFE
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mainline inclusion
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from mainline-v5.10-rc1
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commit 2c4d582322ff412f83f5c538e33c9440a30db73d
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category: feature
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bugzilla: https://gitee.com/src-openeuler/kernel/issues/I8F81L
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Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2c4d582322ff412f83f5c538e33c9440a30db73d
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----------------------------------------------------------------------
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Add BIST support for phy FFE (Feed forward equalizer) setting. The user can
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configure FFE through the new debugfs interface.
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FFE is a parameter used for link layer control. It will affect the link
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quality between the SAS controller and the backplane. In the BIST test, the
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FFE interface is provided to assist board testers in optimizing link
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parameters.
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The modification of the FFE parameter will affect the test after BIST or
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the normal running of the board. The user should save the initial FFE
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values and restore them after BIST test is complete.
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Link: https://lore.kernel.org/r/1598958790-232272-6-git-send-email-john.garry@huawei.com
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Signed-off-by: Luo Jiaxing <luojiaxing@huawei.com>
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Signed-off-by: John Garry <john.garry@huawei.com>
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Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Signed-off-by: YunYi Yang <yangyunyi2@huawei.com>
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Conflicts:
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drivers/scsi/hisi_sas/hisi_sas.h
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drivers/scsi/hisi_sas/hisi_sas_main.c
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drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
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---
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drivers/scsi/hisi_sas/hisi_sas.h | 13 +++++++++++++
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1 file changed, 13 insertions(+)
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diff --git a/drivers/scsi/hisi_sas/hisi_sas.h b/drivers/scsi/hisi_sas/hisi_sas.h
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index 6b66c056ecc8..94514b3615e2 100644
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--- a/drivers/scsi/hisi_sas/hisi_sas.h
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+++ b/drivers/scsi/hisi_sas/hisi_sas.h
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@@ -313,6 +313,18 @@ enum hisi_sas_debugfs_cache_type {
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HISI_SAS_IOST_CACHE,
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};
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+enum hisi_sas_debugfs_bist_ffe_cfg {
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+ FFE_SAS_1_5_GBPS,
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+ FFE_SAS_3_0_GBPS,
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+ FFE_SAS_6_0_GBPS,
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+ FFE_SAS_12_0_GBPS,
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+ FFE_RESV,
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+ FFE_SATA_1_5_GBPS,
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+ FFE_SATA_3_0_GBPS,
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+ FFE_SATA_6_0_GBPS,
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+ FFE_CFG_MAX
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+};
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+
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struct hisi_sas_hw {
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int (*hw_init)(struct hisi_hba *hisi_hba);
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void (*setup_itct)(struct hisi_hba *hisi_hba,
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@@ -479,6 +491,7 @@ struct hisi_hba {
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int bist_loopback_mode;
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u32 bist_loopback_cnt;
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int bist_loopback_enable;
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+ u32 debugfs_bist_ffe[HISI_SAS_MAX_PHYS][FFE_CFG_MAX];
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int enable_dix_dif;
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unsigned int *reply_map;
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--
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2.27.0
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