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author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-04-16 23:02:04 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-04-16 23:02:04 (GMT) |
commit | 7d69cff26ceadce8638cb65191285932a3de3d4c (patch) | |
tree | 7a23eb561e6a25fbd111af2d0152cc6f34c2cecd /drivers/scsi/ufs/ufshcd.c | |
parent | 8fa6f4974d55ad1fb0a9522c5a5cfd050a517048 (diff) | |
parent | 0351b8f81392c6dbbbb036e5c8f73ceff68726e9 (diff) | |
download | linux-7d69cff26ceadce8638cb65191285932a3de3d4c.tar.xz |
Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI updates from James Bottomley:
"This is the usual grab bag of driver updates (lpfc, qla2xxx, storvsc,
aacraid, ipr) plus an assortment of minor updates. There's also a
major update to aic1542 which moves the driver into this millenium"
* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (106 commits)
change SCSI Maintainer email
sd, mmc, virtio_blk, string_helpers: fix block size units
ufs: add support to allow non standard behaviours (quirks)
ufs-qcom: save controller revision info in internal structure
qla2xxx: Update driver version to 8.07.00.18-k
qla2xxx: Restore physical port WWPN only, when port down detected for FA-WWPN port.
qla2xxx: Fix virtual port configuration, when switch port is disabled/enabled.
qla2xxx: Prevent multiple firmware dump collection for ISP27XX.
qla2xxx: Disable Interrupt handshake for ISP27XX.
qla2xxx: Add debugging info for MBX timeout.
qla2xxx: Add serdes read/write support for ISP27XX
qla2xxx: Add udev notification to save fw dump for ISP27XX
qla2xxx: Add message for sucessful FW dump collected for ISP27XX.
qla2xxx: Add support to load firmware from file for ISP 26XX/27XX.
qla2xxx: Fix beacon blink for ISP27XX.
qla2xxx: Increase the wait time for firmware to be ready for P3P.
qla2xxx: Fix crash due to wrong casting of reg for ISP27XX.
qla2xxx: Fix warnings reported by static checker.
lpfc: Update version to 10.5.0.0 for upstream patch set
lpfc: Update copyright to 2015
...
Diffstat (limited to 'drivers/scsi/ufs/ufshcd.c')
-rw-r--r-- | drivers/scsi/ufs/ufshcd.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 2aa85e3..648a446 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -183,6 +183,7 @@ static int __ufshcd_setup_clocks(struct ufs_hba *hba, bool on, static int ufshcd_setup_clocks(struct ufs_hba *hba, bool on); static int ufshcd_uic_hibern8_exit(struct ufs_hba *hba); static int ufshcd_uic_hibern8_enter(struct ufs_hba *hba); +static inline void ufshcd_add_delay_before_dme_cmd(struct ufs_hba *hba); static int ufshcd_host_reset_and_restore(struct ufs_hba *hba); static irqreturn_t ufshcd_intr(int irq, void *__hba); static int ufshcd_config_pwr_mode(struct ufs_hba *hba, @@ -972,6 +973,8 @@ ufshcd_send_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd) ufshcd_hold(hba, false); mutex_lock(&hba->uic_cmd_mutex); + ufshcd_add_delay_before_dme_cmd(hba); + spin_lock_irqsave(hba->host->host_lock, flags); ret = __ufshcd_send_uic_cmd(hba, uic_cmd); spin_unlock_irqrestore(hba->host->host_lock, flags); @@ -2058,6 +2061,37 @@ static int ufshcd_dme_link_startup(struct ufs_hba *hba) return ret; } +static inline void ufshcd_add_delay_before_dme_cmd(struct ufs_hba *hba) +{ + #define MIN_DELAY_BEFORE_DME_CMDS_US 1000 + unsigned long min_sleep_time_us; + + if (!(hba->quirks & UFSHCD_QUIRK_DELAY_BEFORE_DME_CMDS)) + return; + + /* + * last_dme_cmd_tstamp will be 0 only for 1st call to + * this function + */ + if (unlikely(!ktime_to_us(hba->last_dme_cmd_tstamp))) { + min_sleep_time_us = MIN_DELAY_BEFORE_DME_CMDS_US; + } else { + unsigned long delta = + (unsigned long) ktime_to_us( + ktime_sub(ktime_get(), + hba->last_dme_cmd_tstamp)); + + if (delta < MIN_DELAY_BEFORE_DME_CMDS_US) + min_sleep_time_us = + MIN_DELAY_BEFORE_DME_CMDS_US - delta; + else + return; /* no more delay required */ + } + + /* allow sleep for extra 50us if needed */ + usleep_range(min_sleep_time_us, min_sleep_time_us + 50); +} + /** * ufshcd_dme_set_attr - UIC command for DME_SET, DME_PEER_SET * @hba: per adapter instance @@ -2157,6 +2191,7 @@ static int ufshcd_uic_pwr_ctrl(struct ufs_hba *hba, struct uic_command *cmd) mutex_lock(&hba->uic_cmd_mutex); init_completion(&uic_async_done); + ufshcd_add_delay_before_dme_cmd(hba); spin_lock_irqsave(hba->host->host_lock, flags); hba->uic_async_done = &uic_async_done; |