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| author | Yaniv Gardi <ygardi@codeaurora.org> | 2015-03-31 14:37:14 (GMT) |
|---|---|---|
| committer | James Bottomley <JBottomley@Odin.com> | 2015-04-10 15:53:56 (GMT) |
| commit | cad2e03d8607793fd71a830b4b41fc8e9e9995ea (patch) | |
| tree | 4ffd08cf1f701eb08fab9c4c01d9d8a84386dae4 /drivers/scsi/ufs/ufshcd.h | |
| parent | bfdbe8ba21291c024afcec95b7bd515b5bf69689 (diff) | |
| download | linux-cad2e03d8607793fd71a830b4b41fc8e9e9995ea.tar.xz | |
ufs: add support to allow non standard behaviours (quirks)
Some implementation of UFS host controller HW might have some non-standard
behaviours (quirks) when compared to behaviour specified by UFSHCI
specification. This patch add support to allow specifying all such quirks
to standard UFS host controller driver so standard driver takes them into
account.
In this change a UFSHCD_QUIRK_DELAY_BEFORE_DME_CMDS is introduced,
where a minimum delay of 1ms is required before DME commands for
stability purposes.
Signed-off-by: Yaniv Gardi <ygardi@codeaurora.org>
Reviewed-by: Gilad Broner <gbroner@codeaurora.org>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
Diffstat (limited to 'drivers/scsi/ufs/ufshcd.h')
| -rw-r--r-- | drivers/scsi/ufs/ufshcd.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h index 4a574aa..b47ff07 100644 --- a/drivers/scsi/ufs/ufshcd.h +++ b/drivers/scsi/ufs/ufshcd.h @@ -366,6 +366,7 @@ struct ufs_init_prefetch { * @saved_err: sticky error mask * @saved_uic_err: sticky UIC error mask * @dev_cmd: ufs device management command information + * @last_dme_cmd_tstamp: time stamp of the last completed DME command * @auto_bkops_enabled: to track whether bkops is enabled in device * @vreg_info: UFS device voltage regulator information * @clk_list_head: UFS host controller clocks list node head @@ -416,6 +417,13 @@ struct ufs_hba { unsigned int irq; bool is_irq_enabled; + /* + * delay before each dme command is required as the unipro + * layer has shown instabilities + */ + #define UFSHCD_QUIRK_DELAY_BEFORE_DME_CMDS UFS_BIT(0) + + unsigned int quirks; /* Deviations from standard UFSHCI spec. */ wait_queue_head_t tm_wq; wait_queue_head_t tm_tag_wq; @@ -446,6 +454,7 @@ struct ufs_hba { /* Device management request data */ struct ufs_dev_cmd dev_cmd; + ktime_t last_dme_cmd_tstamp; /* Keeps information of the UFS device connected to this host */ struct ufs_dev_info dev_info; |