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authorLinus Torvalds <torvalds@linux-foundation.org>2015-04-16 19:02:04 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2015-04-16 19:02:04 -0400
commit7d69cff26ceadce8638cb65191285932a3de3d4c (patch)
tree7a23eb561e6a25fbd111af2d0152cc6f34c2cecd /drivers/scsi/ufs
parent8fa6f4974d55ad1fb0a9522c5a5cfd050a517048 (diff)
parent0351b8f81392c6dbbbb036e5c8f73ceff68726e9 (diff)
downloadop-kernel-dev-7d69cff26ceadce8638cb65191285932a3de3d4c.zip
op-kernel-dev-7d69cff26ceadce8638cb65191285932a3de3d4c.tar.gz
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')
-rw-r--r--drivers/scsi/ufs/ufs-qcom.c36
-rw-r--r--drivers/scsi/ufs/ufs-qcom.h26
-rw-r--r--drivers/scsi/ufs/ufshcd.c35
-rw-r--r--drivers/scsi/ufs/ufshcd.h9
4 files changed, 94 insertions, 12 deletions
diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c
index 9217af9..6652a81 100644
--- a/drivers/scsi/ufs/ufs-qcom.c
+++ b/drivers/scsi/ufs/ufs-qcom.c
@@ -214,8 +214,6 @@ static int ufs_qcom_power_up_sequence(struct ufs_hba *hba)
struct ufs_qcom_host *host = hba->priv;
struct phy *phy = host->generic_phy;
int ret = 0;
- u8 major;
- u16 minor, step;
bool is_rate_B = (UFS_QCOM_LIMIT_HS_RATE == PA_HS_MODE_B)
? true : false;
@@ -224,8 +222,6 @@ static int ufs_qcom_power_up_sequence(struct ufs_hba *hba)
/* provide 1ms delay to let the reset pulse propagate */
usleep_range(1000, 1100);
- ufs_qcom_get_controller_revision(hba, &major, &minor, &step);
- ufs_qcom_phy_save_controller_version(phy, major, minor, step);
ret = ufs_qcom_phy_calibrate_phy(phy, is_rate_B);
if (ret) {
dev_err(hba->dev, "%s: ufs_qcom_phy_calibrate_phy() failed, ret = %d\n",
@@ -698,16 +694,24 @@ out:
*/
static void ufs_qcom_advertise_quirks(struct ufs_hba *hba)
{
- u8 major;
- u16 minor, step;
+ struct ufs_qcom_host *host = hba->priv;
- ufs_qcom_get_controller_revision(hba, &major, &minor, &step);
+ if (host->hw_ver.major == 0x1)
+ hba->quirks |= UFSHCD_QUIRK_DELAY_BEFORE_DME_CMDS;
- /*
- * TBD
- * here we should be advertising controller quirks according to
- * controller version.
- */
+ if (host->hw_ver.major >= 0x2) {
+ if (!ufs_qcom_cap_qunipro(host))
+ /* Legacy UniPro mode still need following quirks */
+ hba->quirks |= UFSHCD_QUIRK_DELAY_BEFORE_DME_CMDS;
+ }
+}
+
+static void ufs_qcom_set_caps(struct ufs_hba *hba)
+{
+ struct ufs_qcom_host *host = hba->priv;
+
+ if (host->hw_ver.major >= 0x2)
+ host->caps = UFS_QCOM_CAP_QUNIPRO;
}
static int ufs_qcom_get_bus_vote(struct ufs_qcom_host *host,
@@ -929,6 +933,13 @@ static int ufs_qcom_init(struct ufs_hba *hba)
if (err)
goto out_host_free;
+ ufs_qcom_get_controller_revision(hba, &host->hw_ver.major,
+ &host->hw_ver.minor, &host->hw_ver.step);
+
+ /* update phy revision information before calling phy_init() */
+ ufs_qcom_phy_save_controller_version(host->generic_phy,
+ host->hw_ver.major, host->hw_ver.minor, host->hw_ver.step);
+
phy_init(host->generic_phy);
err = phy_power_on(host->generic_phy);
if (err)
@@ -938,6 +949,7 @@ static int ufs_qcom_init(struct ufs_hba *hba)
if (err)
goto out_disable_phy;
+ ufs_qcom_set_caps(hba);
ufs_qcom_advertise_quirks(hba);
hba->caps |= UFSHCD_CAP_CLK_GATING | UFSHCD_CAP_CLK_SCALING;
diff --git a/drivers/scsi/ufs/ufs-qcom.h b/drivers/scsi/ufs/ufs-qcom.h
index 9a6febd..db2c0a0 100644
--- a/drivers/scsi/ufs/ufs-qcom.h
+++ b/drivers/scsi/ufs/ufs-qcom.h
@@ -151,7 +151,23 @@ struct ufs_qcom_bus_vote {
struct device_attribute max_bus_bw;
};
+/* Host controller hardware version: major.minor.step */
+struct ufs_hw_version {
+ u16 step;
+ u16 minor;
+ u8 major;
+};
struct ufs_qcom_host {
+
+ /*
+ * Set this capability if host controller supports the QUniPro mode
+ * and if driver wants the Host controller to operate in QUniPro mode.
+ * Note: By default this capability will be kept enabled if host
+ * controller supports the QUniPro mode.
+ */
+ #define UFS_QCOM_CAP_QUNIPRO UFS_BIT(0)
+ u32 caps;
+
struct phy *generic_phy;
struct ufs_hba *hba;
struct ufs_qcom_bus_vote bus_vote;
@@ -161,10 +177,20 @@ struct ufs_qcom_host {
struct clk *rx_l1_sync_clk;
struct clk *tx_l1_sync_clk;
bool is_lane_clks_enabled;
+
+ struct ufs_hw_version hw_ver;
};
#define ufs_qcom_is_link_off(hba) ufshcd_is_link_off(hba)
#define ufs_qcom_is_link_active(hba) ufshcd_is_link_active(hba)
#define ufs_qcom_is_link_hibern8(hba) ufshcd_is_link_hibern8(hba)
+static inline bool ufs_qcom_cap_qunipro(struct ufs_qcom_host *host)
+{
+ if (host->caps & UFS_QCOM_CAP_QUNIPRO)
+ return true;
+ else
+ return false;
+}
+
#endif /* UFS_QCOM_H_ */
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;
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;
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