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Date: Mon, 23 Feb 2015 09:15:15 -0000
From: "Dov Levenglick" <dovl@...eaurora.org>
To: "Gilad Broner" <gbroner@...eaurora.org>
Cc: james.bottomley@...senpartnership.com,
linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org,
linux-arm-msm@...r.kernel.org, santoshsy@...il.com,
linux-scsi-owner@...r.kernel.org, subhashj@...eaurora.org,
ygardi@...eaurora.org, draviv@...eaurora.org,
"Gilad Broner" <gbroner@...eaurora.org>,
"Lee Susman" <lsusman@...eaurora.org>,
"Sujit Reddy Thumma" <sthumma@...eaurora.org>,
"Vinayak Holikatti" <vinholikatti@...il.com>,
"James E.J. Bottomley" <jbottomley@...allels.com>,
"Steven Rostedt" <rostedt@...dmis.org>,
"Ingo Molnar" <mingo@...hat.com>
Subject: Re: [PATCH v3 3/4] scsi: ufs: add trace events and dump prints for
debug
> Add trace events to driver to allow monitoring and profilig
> of activities such as PM suspend/resume, hibernate enter/exit,
> clock gating and clock scaling up/down.
> In addition, add UFS host controller register dumps to provide
> detailed information in case of errors to assist in analysis
> of issues.
>
> Signed-off-by: Dolev Raviv <draviv@...eaurora.org>
> Signed-off-by: Subhash Jadavani <subhashj@...eaurora.org>
> Signed-off-by: Lee Susman <lsusman@...eaurora.org>
> Signed-off-by: Sujit Reddy Thumma <sthumma@...eaurora.org>
> Signed-off-by: Yaniv Gardi <ygardi@...eaurora.org>
> ---
> drivers/scsi/ufs/ufs-qcom.c | 53 +++++
> drivers/scsi/ufs/ufshcd.c | 509
> +++++++++++++++++++++++++++++++++++++++++---
> drivers/scsi/ufs/ufshcd.h | 49 ++++-
> drivers/scsi/ufs/ufshci.h | 1 +
> include/trace/events/ufs.h | 227 ++++++++++++++++++++
> 5 files changed, 808 insertions(+), 31 deletions(-)
> create mode 100644 include/trace/events/ufs.h
>
> diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c
> index 9217af9..9fe675d 100644
> --- a/drivers/scsi/ufs/ufs-qcom.c
> +++ b/drivers/scsi/ufs/ufs-qcom.c
> @@ -30,6 +30,14 @@ static int ufs_qcom_get_bus_vote(struct ufs_qcom_host
> *host,
> const char *speed_mode);
> static int ufs_qcom_set_bus_vote(struct ufs_qcom_host *host, int vote);
>
> +static void ufs_qcom_dump_regs(struct ufs_hba *hba, int offset, int len,
> + char *prefix)
> +{
> + print_hex_dump(KERN_ERR, prefix,
> + len > 4 ? DUMP_PREFIX_OFFSET : DUMP_PREFIX_NONE,
> + 16, 4, hba->mmio_base + offset, len * 4, false);
> +}
> +
> static int ufs_qcom_get_connected_tx_lanes(struct ufs_hba *hba, u32
> *tx_lanes)
> {
> int err = 0;
> @@ -983,6 +991,50 @@ void ufs_qcom_clk_scale_notify(struct ufs_hba *hba)
> dev_req_params->hs_rate);
> }
>
> +static void ufs_qcom_print_hw_debug_reg_all(struct ufs_hba *hba)
> +{
> + u32 reg;
> +
> + ufs_qcom_dump_regs(hba, UFS_UFS_DBG_RD_REG_OCSC, 44,
> + "UFS_UFS_DBG_RD_REG_OCSC ");
> +
> + reg = ufshcd_readl(hba, REG_UFS_CFG1);
> + reg |= UFS_BIT(17);
> + ufshcd_writel(hba, reg, REG_UFS_CFG1);
> +
> + ufs_qcom_dump_regs(hba, UFS_UFS_DBG_RD_EDTL_RAM, 32,
> + "UFS_UFS_DBG_RD_EDTL_RAM ");
> + ufs_qcom_dump_regs(hba, UFS_UFS_DBG_RD_DESC_RAM, 128,
> + "UFS_UFS_DBG_RD_DESC_RAM ");
> + ufs_qcom_dump_regs(hba, UFS_UFS_DBG_RD_PRDT_RAM, 64,
> + "UFS_UFS_DBG_RD_PRDT_RAM ");
> +
> + ufshcd_writel(hba, (reg & ~UFS_BIT(17)), REG_UFS_CFG1);
> +
> + ufs_qcom_dump_regs(hba, UFS_DBG_RD_REG_UAWM, 4,
> + "UFS_DBG_RD_REG_UAWM ");
> + ufs_qcom_dump_regs(hba, UFS_DBG_RD_REG_UARM, 4,
> + "UFS_DBG_RD_REG_UARM ");
> + ufs_qcom_dump_regs(hba, UFS_DBG_RD_REG_TXUC, 48,
> + "UFS_DBG_RD_REG_TXUC ");
> + ufs_qcom_dump_regs(hba, UFS_DBG_RD_REG_RXUC, 27,
> + "UFS_DBG_RD_REG_RXUC ");
> + ufs_qcom_dump_regs(hba, UFS_DBG_RD_REG_DFC, 19,
> + "UFS_DBG_RD_REG_DFC ");
> + ufs_qcom_dump_regs(hba, UFS_DBG_RD_REG_TRLUT, 34,
> + "UFS_DBG_RD_REG_TRLUT ");
> + ufs_qcom_dump_regs(hba, UFS_DBG_RD_REG_TMRLUT, 9,
> + "UFS_DBG_RD_REG_TMRLUT ");
> +}
> +
> +static void ufs_qcom_dump_dbg_regs(struct ufs_hba *hba)
> +{
> + ufs_qcom_dump_regs(hba, REG_UFS_SYS1CLK_1US, 5,
> + "REG_UFS_SYS1CLK_1US ");
> +
> + ufs_qcom_print_hw_debug_reg_all(hba);
> +}
> +
> /**
> * struct ufs_hba_qcom_vops - UFS QCOM specific variant operations
> *
> @@ -1000,5 +1052,6 @@ static const struct ufs_hba_variant_ops
> ufs_hba_qcom_vops = {
> .pwr_change_notify = ufs_qcom_pwr_change_notify,
> .suspend = ufs_qcom_suspend,
> .resume = ufs_qcom_resume,
> + .dbg_register_dump = ufs_qcom_dump_dbg_regs,
> };
> EXPORT_SYMBOL(ufs_hba_qcom_vops);
> diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
> index 84caf6d..ae934f2 100644
> --- a/drivers/scsi/ufs/ufshcd.c
> +++ b/drivers/scsi/ufs/ufshcd.c
> @@ -45,6 +45,9 @@
> #include "unipro.h"
> #include "ufs-debugfs.h"
>
> +#define CREATE_TRACE_POINTS
> +#include <trace/events/ufs.h>
> +
> #ifdef CONFIG_DEBUG_FS
>
> #define UFSHCD_UPDATE_ERROR_STATS(hba, type) \
> @@ -139,6 +142,8 @@
> _ret = ufshcd_disable_vreg(_dev, _vreg); \
> _ret; \
> })
> +#define ufshcd_hex_dump(prefix_str, buf, len) \
> +print_hex_dump(KERN_ERR, prefix_str, DUMP_PREFIX_OFFSET, 16, 4, buf, len,
> false)
>
> static u32 ufs_query_desc_max_size[] = {
> QUERY_DESC_DEVICE_MAX_SIZE,
> @@ -266,6 +271,151 @@ static inline void ufshcd_disable_irq(struct ufs_hba
> *hba)
> }
> }
>
> +#ifdef CONFIG_TRACEPOINTS
> +static void ufshcd_add_command_trace(struct ufs_hba *hba,
> + unsigned int tag, const char *str)
> +{
> + sector_t lba = -1;
> + u8 opcode = 0;
> + u32 intr, doorbell;
> + struct ufshcd_lrb *lrbp;
> + int transfer_len = -1;
> +
> + lrbp = &hba->lrb[tag];
> +
> + if (lrbp->cmd) { /* data phase exists */
> + opcode = (u8)(*lrbp->cmd->cmnd);
> + if ((opcode == READ_10) || (opcode == WRITE_10)) {
> + /*
> + * Currently we only fully trace read(10) and
> write(10)
> + * commands
> + */
> + if (lrbp->cmd->request && lrbp->cmd->request->bio)
> + lba =
> +
> lrbp->cmd->request->bio->bi_iter.bi_sector;
> + transfer_len = be32_to_cpu(
> +
> lrbp->ucd_req_ptr->sc.exp_data_transfer_len);
> + }
> + }
> +
> + intr = ufshcd_readl(hba, REG_INTERRUPT_STATUS);
> + doorbell = ufshcd_readl(hba, REG_UTP_TRANSFER_REQ_DOOR_BELL);
> + trace_ufshcd_command(dev_name(hba->dev), str, tag,
> + doorbell, transfer_len, intr, lba,
> opcode);
> +}
> +
> +static inline void ufshcd_cond_add_cmd_trace(struct ufs_hba *hba,
> + unsigned int tag, const char *str)
> +{
> + if (trace_ufshcd_command_enabled())
> + ufshcd_add_command_trace(hba, tag, str);
> +}
> +#else
> +static inline void ufshcd_cond_add_cmd_trace(struct ufs_hba *hba,
> + unsigned int tag, const char *str)
> +{
> +}
> +#endif
> +
> +static void ufshcd_print_uic_err_hist(struct ufs_hba *hba,
> + struct ufs_uic_err_reg_hist *err_hist, char *err_name)
> +{
> + int i;
> +
> + for (i = 0; i < UIC_ERR_REG_HIST_LENGTH; i++) {
> + int p = (i + err_hist->pos - 1) % UIC_ERR_REG_HIST_LENGTH;
> +
> + if (err_hist->reg[p] == 0)
> + continue;
> + dev_err(hba->dev, "%s[%d] = 0x%x at %lld us", err_name, i,
> + err_hist->reg[p],
> ktime_to_us(err_hist->tstamp[p]));
> + }
> +}
> +
> +static void ufshcd_print_host_regs(struct ufs_hba *hba)
> +{
> + /*
> + * hex_dump reads its data without the readl macro. This might
> + * cause inconsistency issues on some platform, as the printed
> + * values may be from cache and not the most recent value.
> + * To know whether you are looking at an un-cached version verify
> + * that IORESOURCE_MEM flag is on when xxx_get_resource() is
> invoked
> + * during platform/pci probe function.
> + */
> + ufshcd_hex_dump("host regs: ", hba->mmio_base,
> UFSHCI_REG_SPACE_SIZE);
> + dev_err(hba->dev, "hba->ufs_version = 0x%x, hba->capabilities =
> 0x%x",
> + hba->ufs_version, hba->capabilities);
> + dev_err(hba->dev,
> + "hba->outstanding_reqs = 0x%x, hba->outstanding_tasks =
> 0x%x",
> + (u32)hba->outstanding_reqs, (u32)hba->outstanding_tasks);
> + dev_err(hba->dev,
> + "last_hibern8_exit_tstamp at %lld us, hibern8_exit_cnt =
> %d",
> + ktime_to_us(hba->ufs_stats.last_hibern8_exit_tstamp),
> + hba->ufs_stats.hibern8_exit_cnt);
> +
> + ufshcd_print_uic_err_hist(hba, &hba->ufs_stats.pa_err, "pa_err");
> + ufshcd_print_uic_err_hist(hba, &hba->ufs_stats.dl_err, "dl_err");
> + ufshcd_print_uic_err_hist(hba, &hba->ufs_stats.nl_err, "nl_err");
> + ufshcd_print_uic_err_hist(hba, &hba->ufs_stats.tl_err, "tl_err");
> + ufshcd_print_uic_err_hist(hba, &hba->ufs_stats.dme_err,
> "dme_err");
> +
> + if (hba->vops && hba->vops->dbg_register_dump)
> + hba->vops->dbg_register_dump(hba);
> +}
> +
> +static
> +void ufshcd_print_trs(struct ufs_hba *hba, unsigned long bitmap, bool
> pr_prdt)
> +{
> + struct ufshcd_lrb *lrbp;
> + int prdt_length;
> + int tag;
> +
> + for_each_set_bit(tag, &bitmap, hba->nutrs) {
> + lrbp = &hba->lrb[tag];
> +
> + dev_err(hba->dev, "UPIU[%d] - issue time %lld us",
> + tag, ktime_to_us(lrbp->issue_time_stamp));
> + dev_err(hba->dev, "UPIU[%d] - Transfer Request
> Descriptor",
> + tag);
> + ufshcd_hex_dump("UPIU TRD: ", lrbp->utr_descriptor_ptr,
> + sizeof(struct utp_transfer_req_desc));
> + dev_err(hba->dev, "UPIU[%d] - Request UPIU", tag);
> + ufshcd_hex_dump("UPIU REQ: ", lrbp->ucd_req_ptr,
> + sizeof(struct utp_upiu_req));
> + dev_err(hba->dev, "UPIU[%d] - Response UPIU", tag);
> + ufshcd_hex_dump("UPIU RSP: ", lrbp->ucd_rsp_ptr,
> + sizeof(struct utp_upiu_rsp));
> + prdt_length =
> +
> le16_to_cpu(lrbp->utr_descriptor_ptr->prd_table_length);
> + dev_err(hba->dev, "UPIU[%d] - PRDT - %d entries", tag,
> + prdt_length);
> + if (pr_prdt)
> + ufshcd_hex_dump("UPIU PRDT: ", lrbp->ucd_prdt_ptr,
> + sizeof(struct ufshcd_sg_entry) *
> prdt_length);
> + }
> +}
> +
> +static void ufshcd_print_tmrs(struct ufs_hba *hba, unsigned long bitmap)
> +{
> + struct utp_task_req_desc *tmrdp;
> + int tag;
> +
> + for_each_set_bit(tag, &bitmap, hba->nutmrs) {
> + tmrdp = &hba->utmrdl_base_addr[tag];
> + dev_err(hba->dev, "TM[%d] - Task Management Header", tag);
> + ufshcd_hex_dump("TM TRD: ", &tmrdp->header,
> + sizeof(struct request_desc_header));
> + dev_err(hba->dev, "TM[%d] - Task Management Request UPIU",
> + tag);
> + ufshcd_hex_dump("TM REQ: ", tmrdp->task_req_upiu,
> + sizeof(struct utp_upiu_req));
> + dev_err(hba->dev, "TM[%d] - Task Management Response
> UPIU",
> + tag);
> + ufshcd_hex_dump("TM RSP: ", tmrdp->task_rsp_upiu,
> + sizeof(struct utp_task_req_desc));
> + }
> +}
> +
> /*
> * ufshcd_wait_for_register - wait for register value to change
> * @hba - per-adapter interface
> @@ -567,6 +717,40 @@ static inline int ufshcd_is_hba_active(struct ufs_hba
> *hba)
> return (ufshcd_readl(hba, REG_CONTROLLER_ENABLE) & 0x1) ? 0 : 1;
> }
>
> +static const char *ufschd_uic_link_state_to_string(
> + enum uic_link_state state)
> +{
> + switch (state) {
> + case UIC_LINK_OFF_STATE: return "OFF";
> + case UIC_LINK_ACTIVE_STATE: return "ACTIVE";
> + case UIC_LINK_HIBERN8_STATE: return "HIBERN8";
> + default: return "UNKNOWN";
> + }
> +}
> +
> +static const char *ufschd_ufs_dev_pwr_mode_to_string(
> + enum ufs_dev_pwr_mode state)
> +{
> + switch (state) {
> + case UFS_ACTIVE_PWR_MODE: return "ACTIVE";
> + case UFS_SLEEP_PWR_MODE: return "SLEEP";
> + case UFS_POWERDOWN_PWR_MODE: return "POWERDOWN";
> + default: return "UNKNOWN";
> + }
> +}
> +
> +static const char *ufschd_clk_gating_state_to_string(
> + enum clk_gating_state state)
> +{
> + switch (state) {
> + case CLKS_OFF: return "CLKS_OFF";
> + case CLKS_ON: return "CLKS_ON";
> + case REQ_CLKS_OFF: return "REQ_CLKS_OFF";
> + case REQ_CLKS_ON: return "REQ_CLKS_ON";
> + default: return "UNKNOWN_STATE";
> + }
> +}
> +
> static void ufshcd_ungate_work(struct work_struct *work)
> {
> int ret;
> @@ -628,6 +812,9 @@ start:
> case REQ_CLKS_OFF:
> if (cancel_delayed_work(&hba->clk_gating.gate_work)) {
> hba->clk_gating.state = CLKS_ON;
> + trace_ufshcd_clk_gating(dev_name(hba->dev),
> + ufschd_clk_gating_state_to_string(
> + hba->clk_gating.state));
> break;
> }
> /*
> @@ -638,6 +825,9 @@ start:
> case CLKS_OFF:
> scsi_block_requests(hba->host);
> hba->clk_gating.state = REQ_CLKS_ON;
> + trace_ufshcd_clk_gating(dev_name(hba->dev),
> + ufschd_clk_gating_state_to_string(
> + hba->clk_gating.state));
> schedule_work(&hba->clk_gating.ungate_work);
> /*
> * fall through to check if we should wait for this
> @@ -674,6 +864,9 @@ static void ufshcd_gate_work(struct work_struct *work)
> spin_lock_irqsave(hba->host->host_lock, flags);
> if (hba->clk_gating.is_suspended) {
> hba->clk_gating.state = CLKS_ON;
> + trace_ufshcd_clk_gating(dev_name(hba->dev),
> + ufschd_clk_gating_state_to_string(
> + hba->clk_gating.state));
> goto rel_lock;
> }
>
> @@ -689,6 +882,9 @@ static void ufshcd_gate_work(struct work_struct *work)
> if (ufshcd_can_hibern8_during_gating(hba)) {
> if (ufshcd_uic_hibern8_enter(hba)) {
> hba->clk_gating.state = CLKS_ON;
> + trace_ufshcd_clk_gating(dev_name(hba->dev),
> + ufschd_clk_gating_state_to_string(
> + hba->clk_gating.state));
> goto out;
> }
> ufshcd_set_link_hibern8(hba);
> @@ -715,9 +911,12 @@ static void ufshcd_gate_work(struct work_struct
> *work)
> * new requests arriving before the current cancel work is done.
> */
> spin_lock_irqsave(hba->host->host_lock, flags);
> - if (hba->clk_gating.state == REQ_CLKS_OFF)
> + if (hba->clk_gating.state == REQ_CLKS_OFF) {
> hba->clk_gating.state = CLKS_OFF;
> -
> + trace_ufshcd_clk_gating(dev_name(hba->dev),
> + ufschd_clk_gating_state_to_string(
> + hba->clk_gating.state));
> + }
> rel_lock:
> spin_unlock_irqrestore(hba->host->host_lock, flags);
> out:
> @@ -739,6 +938,9 @@ static void __ufshcd_release(struct ufs_hba *hba)
> return;
>
> hba->clk_gating.state = REQ_CLKS_OFF;
> + trace_ufshcd_clk_gating(dev_name(hba->dev),
> + ufschd_clk_gating_state_to_string(
> + hba->clk_gating.state));
> schedule_delayed_work(&hba->clk_gating.gate_work,
> msecs_to_jiffies(hba->clk_gating.delay_ms));
> }
> @@ -836,9 +1038,11 @@ static void ufshcd_clk_scaling_update_busy(struct
> ufs_hba *hba)
> static inline
> void ufshcd_send_command(struct ufs_hba *hba, unsigned int task_tag)
> {
> + hba->lrb[task_tag].issue_time_stamp = ktime_get();
> ufshcd_clk_scaling_start_busy(hba);
> __set_bit(task_tag, &hba->outstanding_reqs);
> ufshcd_writel(hba, 1 << task_tag, REG_UTP_TRANSFER_REQ_DOOR_BELL);
> + ufshcd_cond_add_cmd_trace(hba, task_tag, "send");
> UFSHCD_UPDATE_TAG_STATS(hba, task_tag);
> }
>
> @@ -1460,6 +1664,7 @@ ufshcd_dev_cmd_completion(struct ufs_hba *hba,
> struct ufshcd_lrb *lrbp)
> int resp;
> int err = 0;
>
> + hba->ufs_stats.last_hibern8_exit_tstamp = ktime_set(0, 0);
> resp = ufshcd_get_req_rsp(lrbp->ucd_rsp_ptr);
>
> switch (resp) {
> @@ -1512,6 +1717,8 @@ static int ufshcd_wait_for_dev_cmd(struct ufs_hba
> *hba,
>
> if (!time_left) {
> err = -ETIMEDOUT;
> + dev_dbg(hba->dev, "%s: dev_cmd request timedout, tag
> %d\n",
> + __func__, lrbp->task_tag);
> if (!ufshcd_clear_cmd(hba, lrbp->task_tag))
> /* sucessfully cleared the command, retry if
> needed */
> err = -EAGAIN;
> @@ -1744,8 +1951,8 @@ static int ufshcd_query_attr(struct ufs_hba *hba,
> enum query_opcode opcode,
> err = ufshcd_exec_dev_cmd(hba, DEV_CMD_TYPE_QUERY,
> QUERY_REQ_TIMEOUT);
>
> if (err) {
> - dev_err(hba->dev, "%s: opcode 0x%.2x for idn %d failed,
> err = %d\n",
> - __func__, opcode, idn, err);
> + dev_err(hba->dev, "%s: opcode 0x%.2x for idn %d failed,
> index %d, err = %d\n",
> + __func__, opcode, idn, index, err);
> goto out_unlock;
> }
>
> @@ -1821,8 +2028,8 @@ static int ufshcd_query_descriptor(struct ufs_hba
> *hba,
> err = ufshcd_exec_dev_cmd(hba, DEV_CMD_TYPE_QUERY,
> QUERY_REQ_TIMEOUT);
>
> if (err) {
> - dev_err(hba->dev, "%s: opcode 0x%.2x for idn %d failed,
> err = %d\n",
> - __func__, opcode, idn, err);
> + dev_err(hba->dev, "%s: opcode 0x%.2x for idn %d failed,
> index %d, err = %d\n",
> + __func__, opcode, idn, index, err);
> goto out_unlock;
> }
>
> @@ -1886,8 +2093,9 @@ static int ufshcd_read_desc_param(struct ufs_hba
> *hba,
> (desc_buf[QUERY_DESC_LENGTH_OFFSET] !=
> ufs_query_desc_max_size[desc_id])
> || (desc_buf[QUERY_DESC_DESC_TYPE_OFFSET] != desc_id)) {
> - dev_err(hba->dev, "%s: Failed reading descriptor. desc_id
> %d param_offset %d buff_len %d ret %d",
> - __func__, desc_id, param_offset, buff_len, ret);
> + dev_err(hba->dev, "%s: Failed reading descriptor. desc_id
> %d, param_offset %d, buff_len %d ,index %d, ret %d",
> + __func__, desc_id, param_offset, buff_len,
> + desc_index, ret);
> if (!ret)
> ret = -EINVAL;
>
> @@ -2385,15 +2593,20 @@ static int ufshcd_uic_hibern8_enter(struct ufs_hba
> *hba)
> {
> int ret;
> struct uic_command uic_cmd = {0};
> + ktime_t start = ktime_get();
>
> uic_cmd.command = UIC_CMD_DME_HIBER_ENTER;
> -
> ret = ufshcd_uic_pwr_ctrl(hba, &uic_cmd);
> + trace_ufshcd_profile_hibern8(dev_name(hba->dev), "enter",
> + ktime_to_us(ktime_sub(ktime_get(), start)),
> ret);
>
> if (ret) {
> UFSHCD_UPDATE_ERROR_STATS(hba, UFS_ERR_HIBERN8_ENTER);
> dev_err(hba->dev, "%s: hibern8 enter failed. ret = %d",
> __func__, ret);
> + } else {
> + dev_dbg(hba->dev, "%s: Hibern8 Enter at %lld us",
> __func__,
> + ktime_to_us(ktime_get()));
> }
>
> return ret;
> @@ -2403,20 +2616,55 @@ static int ufshcd_uic_hibern8_exit(struct ufs_hba
> *hba)
> {
> struct uic_command uic_cmd = {0};
> int ret;
> + ktime_t start = ktime_get();
>
> uic_cmd.command = UIC_CMD_DME_HIBER_EXIT;
> ret = ufshcd_uic_pwr_ctrl(hba, &uic_cmd);
> + trace_ufshcd_profile_hibern8(dev_name(hba->dev), "exit",
> + ktime_to_us(ktime_sub(ktime_get(), start)),
> ret);
> +
> if (ret) {
> ufshcd_set_link_off(hba);
> UFSHCD_UPDATE_ERROR_STATS(hba, UFS_ERR_HIBERN8_EXIT);
> dev_err(hba->dev, "%s: hibern8 exit failed. ret = %d",
> __func__, ret);
> ret = ufshcd_host_reset_and_restore(hba);
> + } else {
> + dev_dbg(hba->dev, "%s: Hibern8 Exit at %lld us", __func__,
> + ktime_to_us(ktime_get()));
> + hba->ufs_stats.last_hibern8_exit_tstamp = ktime_get();
> + hba->ufs_stats.hibern8_exit_cnt++;
> }
>
> return ret;
> }
>
> +/**
> + * ufshcd_print_pwr_info - print power params as saved in hba
> + * power info
> + * @hba: per-adapter instance
> + */
> +static void ufshcd_print_pwr_info(struct ufs_hba *hba)
> +{
> + static const char * const names[] = {
> + "INVALID MODE",
> + "FAST MODE",
> + "SLOW_MODE",
> + "INVALID MODE",
> + "FASTAUTO_MODE",
> + "SLOWAUTO_MODE",
> + "INVALID MODE",
> + };
> +
> + dev_info(hba->dev, "%s:[RX, TX]: gear=[%d, %d], lane[%d, %d],
> pwr[%s, %s], rate = %d\n",
> + __func__,
> + hba->pwr_info.gear_rx, hba->pwr_info.gear_tx,
> + hba->pwr_info.lane_rx, hba->pwr_info.lane_tx,
> + names[hba->pwr_info.pwr_rx],
> + names[hba->pwr_info.pwr_tx],
> + hba->pwr_info.hs_rate);
> +}
> +
> /**
> * ufshcd_init_pwr_info - setting the POR (power on reset)
> * values in hba power info
> @@ -2560,6 +2808,8 @@ int ufshcd_change_power_mode(struct ufs_hba *hba,
> sizeof(struct ufs_pa_layer_attr));
> }
>
> + ufshcd_print_pwr_info(hba);
> +
> return ret;
> }
>
> @@ -2803,6 +3053,10 @@ static int ufshcd_link_startup(struct ufs_hba *hba)
> /* failed to get the link up... retire */
> goto out;
>
> + /* Mark that link is up in PWM-G1, 1-lane, SLOW-AUTO mode */
> + ufshcd_init_pwr_info(hba);
> + ufshcd_print_pwr_info(hba);
> +
> /* Include any host controller configuration via UIC commands */
> if (hba->vops && hba->vops->link_startup_notify) {
> ret = hba->vops->link_startup_notify(hba, POST_CHANGE);
> @@ -3110,6 +3364,7 @@ ufshcd_transfer_rsp_status(struct ufs_hba *hba,
> struct ufshcd_lrb *lrbp)
> int result = 0;
> int scsi_status;
> int ocs;
> + bool print_prdt;
>
> /* overall command status of utrd */
> ocs = ufshcd_get_tr_ocs(lrbp);
> @@ -3117,7 +3372,7 @@ ufshcd_transfer_rsp_status(struct ufs_hba *hba,
> struct ufshcd_lrb *lrbp)
> switch (ocs) {
> case OCS_SUCCESS:
> result = ufshcd_get_req_rsp(lrbp->ucd_rsp_ptr);
> -
> + hba->ufs_stats.last_hibern8_exit_tstamp = ktime_set(0, 0);
> switch (result) {
> case UPIU_TRANSACTION_RESPONSE:
> /*
> @@ -3165,10 +3420,17 @@ ufshcd_transfer_rsp_status(struct ufs_hba *hba,
> struct ufshcd_lrb *lrbp)
> default:
> result |= DID_ERROR << 16;
> dev_err(hba->dev,
> - "OCS error from controller = %x\n", ocs);
> + "OCS error from controller = %x for tag
> %d\n",
> + ocs, lrbp->task_tag);
> + ufshcd_print_host_regs(hba);
> break;
> } /* end of switch */
>
> + if ((host_byte(result) != DID_OK) && !hba->silence_err_logs) {
> + print_prdt = (ocs == OCS_INVALID_PRDT_ATTR ||
> + ocs == OCS_MISMATCH_DATA_BUF_SIZE);
> + ufshcd_print_trs(hba, 1 << lrbp->task_tag, print_prdt);
> + }
> return result;
> }
>
> @@ -3220,6 +3482,7 @@ static void ufshcd_transfer_req_compl(struct ufs_hba
> *hba)
> lrbp = &hba->lrb[index];
> cmd = lrbp->cmd;
> if (cmd) {
> + ufshcd_cond_add_cmd_trace(hba, index, "complete");
> UFSHCD_UPDATE_TAG_STATS_COMPLETION(hba, cmd);
> result = ufshcd_transfer_rsp_status(hba, lrbp);
> scsi_dma_unmap(cmd);
> @@ -3231,8 +3494,11 @@ static void ufshcd_transfer_req_compl(struct
> ufs_hba *hba)
> cmd->scsi_done(cmd);
> __ufshcd_release(hba);
> } else if (lrbp->command_type == UTP_CMD_TYPE_DEV_MANAGE)
> {
> - if (hba->dev_cmd.complete)
> + if (hba->dev_cmd.complete) {
> + ufshcd_cond_add_cmd_trace(hba, index,
> + "dev_complete");
> complete(hba->dev_cmd.complete);
> + }
> }
> }
>
> @@ -3328,6 +3594,7 @@ static int ufshcd_enable_auto_bkops(struct ufs_hba
> *hba)
> }
>
> hba->auto_bkops_enabled = true;
> + trace_ufshcd_auto_bkops_state(dev_name(hba->dev), "Enabled");
>
> /* No need of URGENT_BKOPS exception from the device */
> err = ufshcd_disable_ee(hba, MASK_EE_URGENT_BKOPS);
> @@ -3378,6 +3645,7 @@ static int ufshcd_disable_auto_bkops(struct ufs_hba
> *hba)
> }
>
> hba->auto_bkops_enabled = false;
> + trace_ufshcd_auto_bkops_state(dev_name(hba->dev), "Disabled");
> out:
> return err;
> }
> @@ -3530,6 +3798,22 @@ static void ufshcd_err_handler(struct work_struct
> *work)
> /* Complete requests that have door-bell cleared by h/w */
> ufshcd_transfer_req_compl(hba);
> ufshcd_tmc_handler(hba);
> +
> + /*
> + * Dump controller state before resetting. Transfer requests state
> + * will be dump as part of the request completion.
> + */
> + if (hba->saved_err & (INT_FATAL_ERRORS | UIC_ERROR)) {
> + dev_err(hba->dev, "%s: saved_err 0x%x saved_uic_err 0x%x",
> + __func__, hba->saved_err, hba->saved_uic_err);
> + if (!hba->silence_err_logs) {
> + ufshcd_print_host_regs(hba);
> + ufshcd_print_pwr_info(hba);
> + ufshcd_print_tmrs(hba, hba->outstanding_tasks);
> + }
> + }
> +
> +
> spin_unlock_irqrestore(hba->host->host_lock, flags);
>
> /* Clear pending transfer requests */
> @@ -3578,7 +3862,14 @@ static void ufshcd_err_handler(struct work_struct
> *work)
> scsi_report_bus_reset(hba->host, 0);
> hba->saved_err = 0;
> hba->saved_uic_err = 0;
> + } else {
> + hba->ufshcd_state = UFSHCD_STATE_OPERATIONAL;
> + if (hba->saved_err || hba->saved_uic_err)
> + dev_err_ratelimited(hba->dev, "%s: exit: saved_err
> 0x%x saved_uic_err 0x%x",
> + __func__, hba->saved_err, hba->saved_uic_err);
> }
> +
> + hba->silence_err_logs = false;
> ufshcd_clear_eh_in_progress(hba);
>
> out:
> @@ -3587,6 +3878,14 @@ out:
> pm_runtime_put_sync(hba->dev);
> }
>
> +static void ufshcd_update_uic_reg_hist(struct ufs_uic_err_reg_hist
> *reg_hist,
> + u32 reg)
> +{
> + reg_hist->reg[reg_hist->pos] = reg;
> + reg_hist->tstamp[reg_hist->pos] = ktime_get();
> + reg_hist->pos = (reg_hist->pos + 1) % UIC_ERR_REG_HIST_LENGTH;
> +}
> +
> /**
> * ufshcd_update_uic_error - check and set fatal UIC error flags.
> * @hba: per-adapter instance
> @@ -3595,23 +3894,46 @@ static void ufshcd_update_uic_error(struct ufs_hba
> *hba)
> {
> u32 reg;
>
> + /* PHY layer lane error */
> + reg = ufshcd_readl(hba, REG_UIC_ERROR_CODE_PHY_ADAPTER_LAYER);
> + /* Ignore LINERESET indication, as this is not an error */
> + if ((reg & UIC_PHY_ADAPTER_LAYER_ERROR) &&
> + (reg & UIC_PHY_ADAPTER_LAYER_LANE_ERR_MASK)) {
> + /*
> + * To know whether this error is fatal or not, DB timeout
> + * must be checked but this error is handled separately.
> + */
> + dev_dbg(hba->dev, "%s: UIC Lane error reported, reg
> 0x%x\n",
> + __func__, reg);
> + ufshcd_update_uic_reg_hist(&hba->ufs_stats.pa_err, reg);
> + }
> +
> /* PA_INIT_ERROR is fatal and needs UIC reset */
> reg = ufshcd_readl(hba, REG_UIC_ERROR_CODE_DATA_LINK_LAYER);
> + if (reg)
> + ufshcd_update_uic_reg_hist(&hba->ufs_stats.dl_err, reg);
> +
> if (reg & UIC_DATA_LINK_LAYER_ERROR_PA_INIT)
> hba->uic_error |= UFSHCD_UIC_DL_PA_INIT_ERROR;
>
> /* UIC NL/TL/DME errors needs software retry */
> reg = ufshcd_readl(hba, REG_UIC_ERROR_CODE_NETWORK_LAYER);
> - if (reg)
> + if (reg) {
> + ufshcd_update_uic_reg_hist(&hba->ufs_stats.nl_err, reg);
> hba->uic_error |= UFSHCD_UIC_NL_ERROR;
> + }
>
> reg = ufshcd_readl(hba, REG_UIC_ERROR_CODE_TRANSPORT_LAYER);
> - if (reg)
> + if (reg) {
> + ufshcd_update_uic_reg_hist(&hba->ufs_stats.tl_err, reg);
> hba->uic_error |= UFSHCD_UIC_TL_ERROR;
> + }
>
> reg = ufshcd_readl(hba, REG_UIC_ERROR_CODE_DME);
> - if (reg)
> + if (reg) {
> + ufshcd_update_uic_reg_hist(&hba->ufs_stats.dme_err, reg);
> hba->uic_error |= UFSHCD_UIC_DME_ERROR;
> + }
>
> dev_dbg(hba->dev, "%s: UIC error flags = 0x%08x\n",
> __func__, hba->uic_error);
> @@ -3636,16 +3958,20 @@ static void ufshcd_check_errors(struct ufs_hba
> *hba)
> }
>
> if (queue_eh_work) {
> + /*
> + * update the transfer error masks to sticky bits, let's
> do this
> + * irrespective of current ufshcd_state.
> + */
> + hba->saved_err |= hba->errors;
> + hba->saved_uic_err |= hba->uic_error;
> +
> /* handle fatal errors only when link is functional */
> if (hba->ufshcd_state == UFSHCD_STATE_OPERATIONAL) {
> /* block commands from scsi mid-layer */
> scsi_block_requests(hba->host);
>
> - /* transfer error masks to sticky bits */
> - hba->saved_err |= hba->errors;
> - hba->saved_uic_err |= hba->uic_error;
> -
> hba->ufshcd_state = UFSHCD_STATE_ERROR;
> +
> schedule_work(&hba->eh_work);
> }
> }
> @@ -3917,18 +4243,42 @@ static int ufshcd_abort(struct scsi_cmnd *cmd)
> __func__, tag);
> }
>
> + /* Print Transfer Request of aborted task */
> + dev_err(hba->dev, "%s: Device abort task at tag %d", __func__,
> tag);
> +
> + /*
> + * Print detailed info about aborted request.
> + * As more than one request might get aborted at the same time,
> + * print full information only for the first aborted request in
> order
> + * to reduce repeated printouts. For other aborted requests only
> print
> + * basic details.
> + */
> + scsi_print_command(cmd);
> + if (!hba->req_abort_count) {
> + ufshcd_print_host_regs(hba);
> + ufshcd_print_pwr_info(hba);
> + ufshcd_print_trs(hba, 1 << tag, true);
> + } else {
> + ufshcd_print_trs(hba, 1 << tag, false);
> + }
> + hba->req_abort_count++;
> +
> lrbp = &hba->lrb[tag];
> for (poll_cnt = 100; poll_cnt; poll_cnt--) {
> err = ufshcd_issue_tm_cmd(hba, lrbp->lun, lrbp->task_tag,
> UFS_QUERY_TASK, &resp);
> if (!err && resp == UPIU_TASK_MANAGEMENT_FUNC_SUCCEEDED) {
> /* cmd pending in the device */
> + dev_err(hba->dev, "%s: cmd pending in the device.
> tag = %d",
> + __func__, tag);
> break;
> } else if (!err && resp ==
> UPIU_TASK_MANAGEMENT_FUNC_COMPL) {
> /*
> * cmd not pending in the device, check if it is
> * in transition.
> */
> + dev_err(hba->dev, "%s: cmd at tag %d not pending
> in the device.",
> + __func__, tag);
> reg = ufshcd_readl(hba,
> REG_UTP_TRANSFER_REQ_DOOR_BELL);
> if (reg & (1 << tag)) {
> /* sleep for max. 200us to stabilize */
> @@ -3936,8 +4286,13 @@ static int ufshcd_abort(struct scsi_cmnd *cmd)
> continue;
> }
> /* command completed already */
> + dev_err(hba->dev, "%s: cmd at tag %d successfully
> cleared from DB.",
> + __func__, tag);
> goto out;
> } else {
> + dev_err(hba->dev,
> + "%s: no response from device. tag = %d,
> err %d",
> + __func__, tag, err);
> if (!err)
> err = resp; /* service response error */
> goto out;
> @@ -3952,14 +4307,20 @@ static int ufshcd_abort(struct scsi_cmnd *cmd)
> err = ufshcd_issue_tm_cmd(hba, lrbp->lun, lrbp->task_tag,
> UFS_ABORT_TASK, &resp);
> if (err || resp != UPIU_TASK_MANAGEMENT_FUNC_COMPL) {
> - if (!err)
> + if (!err) {
> err = resp; /* service response error */
> + dev_err(hba->dev, "%s: issued. tag = %d, err %d",
> + __func__, tag, err);
> + }
> goto out;
> }
>
> err = ufshcd_clear_cmd(hba, tag);
> - if (err)
> + if (err) {
> + dev_err(hba->dev, "%s: Failed clearing cmd at tag %d, err
> %d",
> + __func__, tag, err);
> goto out;
> + }
>
> scsi_dma_unmap(cmd);
>
> @@ -4292,6 +4653,22 @@ out:
> return ret;
> }
>
> +static void ufshcd_clear_dbg_ufs_stats(struct ufs_hba *hba)
> +{
> + int err_reg_hist_size = sizeof(struct ufs_uic_err_reg_hist);
> +
> + hba->ufs_stats.hibern8_exit_cnt = 0;
> + hba->ufs_stats.last_hibern8_exit_tstamp = ktime_set(0, 0);
> +
> + memset(&hba->ufs_stats.pa_err, 0, err_reg_hist_size);
> + memset(&hba->ufs_stats.dl_err, 0, err_reg_hist_size);
> + memset(&hba->ufs_stats.nl_err, 0, err_reg_hist_size);
> + memset(&hba->ufs_stats.tl_err, 0, err_reg_hist_size);
> + memset(&hba->ufs_stats.dme_err, 0, err_reg_hist_size);
> +
> + hba->req_abort_count = 0;
> +}
> +
> /**
> * ufshcd_probe_hba - probe hba to detect device and initialize
> * @hba: per-adapter instance
> @@ -4301,12 +4678,17 @@ out:
> static int ufshcd_probe_hba(struct ufs_hba *hba)
> {
> int ret;
> + ktime_t start = ktime_get();
>
> ret = ufshcd_link_startup(hba);
> if (ret)
> goto out;
>
> + /* Debug counters initialization */
> + ufshcd_clear_dbg_ufs_stats(hba);
> +
> ufshcd_init_pwr_info(hba);
> + ufshcd_print_pwr_info(hba);
>
> /* UniPro link is active now */
> ufshcd_set_link_active(hba);
> @@ -4377,6 +4759,10 @@ out:
> ufshcd_hba_exit(hba);
> }
>
> + trace_ufshcd_init(dev_name(hba->dev), ret,
> + ktime_to_us(ktime_sub(ktime_get(), start)),
> + ufschd_ufs_dev_pwr_mode_to_string(hba->curr_dev_pwr_mode),
> + ufschd_uic_link_state_to_string(hba->uic_link_state));
> return ret;
> }
>
> @@ -4837,6 +5223,8 @@ static int __ufshcd_setup_clocks(struct ufs_hba
> *hba, bool on,
> struct ufs_clk_info *clki;
> struct list_head *head = &hba->clk_list_head;
> unsigned long flags;
> + ktime_t start = ktime_get();
> + bool clk_state_changed = false;
>
> if (!head || list_empty(head))
> goto out;
> @@ -4846,6 +5234,7 @@ static int __ufshcd_setup_clocks(struct ufs_hba
> *hba, bool on,
> if (skip_ref_clk && !strcmp(clki->name,
> "ref_clk"))
> continue;
>
> + clk_state_changed = on ^ clki->enabled;
> if (on && !clki->enabled) {
> ret = clk_prepare_enable(clki->clk);
> if (ret) {
> @@ -4873,8 +5262,17 @@ out:
> } else if (on) {
> spin_lock_irqsave(hba->host->host_lock, flags);
> hba->clk_gating.state = CLKS_ON;
> + trace_ufshcd_clk_gating(dev_name(hba->dev),
> + ufschd_clk_gating_state_to_string(
> + hba->clk_gating.state));
> +
> spin_unlock_irqrestore(hba->host->host_lock, flags);
> }
> +
> + if (clk_state_changed)
> + trace_ufshcd_profile_clk_gating(dev_name(hba->dev),
> + (on ? "on" : "off"),
> + ktime_to_us(ktime_sub(ktime_get(), start)), ret);
> return ret;
> }
>
> @@ -5361,6 +5759,8 @@ disable_clks:
> __ufshcd_setup_clocks(hba, false, true);
>
> hba->clk_gating.state = CLKS_OFF;
> + trace_ufshcd_clk_gating(dev_name(hba->dev),
> + ufschd_clk_gating_state_to_string(hba->clk_gating.state));
> /*
> * Disable the host irq as host controller as there won't be any
> * host controller trasanction expected till resume.
> @@ -5507,6 +5907,7 @@ out:
> int ufshcd_system_suspend(struct ufs_hba *hba)
> {
> int ret = 0;
> + ktime_t start = ktime_get();
>
> if (!hba || !hba->is_powered)
> return 0;
> @@ -5536,6 +5937,10 @@ int ufshcd_system_suspend(struct ufs_hba *hba)
>
> ret = ufshcd_suspend(hba, UFS_SYSTEM_PM);
> out:
> + trace_ufshcd_system_suspend(dev_name(hba->dev), ret,
> + ktime_to_us(ktime_sub(ktime_get(), start)),
> + ufschd_ufs_dev_pwr_mode_to_string(hba->curr_dev_pwr_mode),
> + ufschd_uic_link_state_to_string(hba->uic_link_state));
> if (!ret)
> hba->is_sys_suspended = true;
> return ret;
> @@ -5551,14 +5956,23 @@ EXPORT_SYMBOL(ufshcd_system_suspend);
>
> int ufshcd_system_resume(struct ufs_hba *hba)
> {
> + int ret = 0;
> + ktime_t start = ktime_get();
> +
> if (!hba || !hba->is_powered || pm_runtime_suspended(hba->dev))
> /*
> * Let the runtime resume take care of resuming
> * if runtime suspended.
> */
> - return 0;
> -
> - return ufshcd_resume(hba, UFS_SYSTEM_PM);
> + goto out;
> + else
> + ret = ufshcd_resume(hba, UFS_SYSTEM_PM);
> +out:
> + trace_ufshcd_system_resume(dev_name(hba->dev), ret,
> + ktime_to_us(ktime_sub(ktime_get(), start)),
> + ufschd_ufs_dev_pwr_mode_to_string(hba->curr_dev_pwr_mode),
> + ufschd_uic_link_state_to_string(hba->uic_link_state));
> + return ret;
> }
> EXPORT_SYMBOL(ufshcd_system_resume);
>
> @@ -5572,10 +5986,19 @@ EXPORT_SYMBOL(ufshcd_system_resume);
> */
> int ufshcd_runtime_suspend(struct ufs_hba *hba)
> {
> - if (!hba || !hba->is_powered)
> - return 0;
> + int ret = 0;
> + ktime_t start = ktime_get();
>
> - return ufshcd_suspend(hba, UFS_RUNTIME_PM);
> + if (!hba || !hba->is_powered)
> + goto out;
> + else
> + ret = ufshcd_suspend(hba, UFS_RUNTIME_PM);
> +out:
> + trace_ufshcd_runtime_suspend(dev_name(hba->dev), ret,
> + ktime_to_us(ktime_sub(ktime_get(), start)),
> + ufschd_ufs_dev_pwr_mode_to_string(hba->curr_dev_pwr_mode),
> + ufschd_uic_link_state_to_string(hba->uic_link_state));
> + return ret;
> }
> EXPORT_SYMBOL(ufshcd_runtime_suspend);
>
> @@ -5602,10 +6025,19 @@ EXPORT_SYMBOL(ufshcd_runtime_suspend);
> */
> int ufshcd_runtime_resume(struct ufs_hba *hba)
> {
> + int ret = 0;
> + ktime_t start = ktime_get();
> +
> if (!hba || !hba->is_powered)
> - return 0;
> + goto out;
> else
> - return ufshcd_resume(hba, UFS_RUNTIME_PM);
> + ret = ufshcd_resume(hba, UFS_RUNTIME_PM);
> +out:
> + trace_ufshcd_runtime_resume(dev_name(hba->dev), ret,
> + ktime_to_us(ktime_sub(ktime_get(), start)),
> + ufschd_ufs_dev_pwr_mode_to_string(hba->curr_dev_pwr_mode),
> + ufschd_uic_link_state_to_string(hba->uic_link_state));
> + return ret;
> }
> EXPORT_SYMBOL(ufshcd_runtime_resume);
>
> @@ -5724,6 +6156,8 @@ static int ufshcd_scale_clks(struct ufs_hba *hba,
> bool scale_up)
> int ret = 0;
> struct ufs_clk_info *clki;
> struct list_head *head = &hba->clk_list_head;
> + ktime_t start = ktime_get();
> + bool clk_state_changed = false;
>
> if (!head || list_empty(head))
> goto out;
> @@ -5733,6 +6167,8 @@ static int ufshcd_scale_clks(struct ufs_hba *hba,
> bool scale_up)
> if (scale_up && clki->max_freq) {
> if (clki->curr_freq == clki->max_freq)
> continue;
> +
> + clk_state_changed = true;
> ret = clk_set_rate(clki->clk,
> clki->max_freq);
> if (ret) {
> dev_err(hba->dev, "%s: %s clk set
> rate(%dHz) failed, %d\n",
> @@ -5740,11 +6176,17 @@ static int ufshcd_scale_clks(struct ufs_hba *hba,
> bool scale_up)
> clki->max_freq, ret);
> break;
> }
> +
> trace_ufshcd_clk_scaling(dev_name(hba->dev),
> + "scaled up", clki->name,
> + clki->curr_freq,
> + clki->max_freq);
> clki->curr_freq = clki->max_freq;
>
> } else if (!scale_up && clki->min_freq) {
> if (clki->curr_freq == clki->min_freq)
> continue;
> +
> + clk_state_changed = true;
> ret = clk_set_rate(clki->clk,
> clki->min_freq);
> if (ret) {
> dev_err(hba->dev, "%s: %s clk set
> rate(%dHz) failed, %d\n",
> @@ -5752,6 +6194,10 @@ static int ufshcd_scale_clks(struct ufs_hba *hba,
> bool scale_up)
> clki->min_freq, ret);
> break;
> }
> +
> trace_ufshcd_clk_scaling(dev_name(hba->dev),
> + "scaled down", clki->name,
> + clki->curr_freq,
> + clki->min_freq);
> clki->curr_freq = clki->min_freq;
> }
> }
> @@ -5761,6 +6207,10 @@ static int ufshcd_scale_clks(struct ufs_hba *hba,
> bool scale_up)
> if (hba->vops->clk_scale_notify)
> hba->vops->clk_scale_notify(hba);
> out:
> + if (clk_state_changed)
> + trace_ufshcd_profile_clk_scaling(dev_name(hba->dev),
> + (scale_up ? "up" : "down"),
> + ktime_to_us(ktime_sub(ktime_get(), start)), ret);
> return ret;
> }
>
> @@ -5931,6 +6381,7 @@ int ufshcd_init(struct ufs_hba *hba, void __iomem
> *mmio_base, unsigned int irq)
> err = ufshcd_hba_enable(hba);
> if (err) {
> dev_err(hba->dev, "Host controller enable failed\n");
> + ufshcd_print_host_regs(hba);
> goto out_remove_scsi_host;
> }
>
> diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
> index d9b1251..d9eb2ca 100644
> --- a/drivers/scsi/ufs/ufshcd.h
> +++ b/drivers/scsi/ufs/ufshcd.h
> @@ -178,6 +178,7 @@ struct ufs_pm_lvl_states {
> * @task_tag: Task tag of the command
> * @lun: LUN of the command
> * @intr_cmd: Interrupt command (doesn't participate in interrupt
> aggregation)
> + * @issue_time_stamp: time stamp for debug purposes
> */
> struct ufshcd_lrb {
> struct utp_transfer_req_desc *utr_descriptor_ptr;
> @@ -194,6 +195,7 @@ struct ufshcd_lrb {
> int task_tag;
> u8 lun; /* UPIU LUN id field is only 8-bit wide */
> bool intr_cmd;
> + ktime_t issue_time_stamp;
> };
>
> /**
> @@ -223,14 +225,52 @@ struct ufs_dev_cmd {
> struct ufs_query query;
> };
>
> -#ifdef CONFIG_DEBUG_FS
> +#define UIC_ERR_REG_HIST_LENGTH 8
> +/**
> + * struct ufs_uic_err_reg_hist - keeps history of uic errors
> + * @pos: index to indicate cyclic buffer position
> + * @reg: cyclic buffer for registers value
> + * @tstamp: cyclic buffer for time stamp
> + */
> +struct ufs_uic_err_reg_hist {
> + int pos;
> + u32 reg[UIC_ERR_REG_HIST_LENGTH];
> + ktime_t tstamp[UIC_ERR_REG_HIST_LENGTH];
> +};
> +
> +/**
> + * struct ufs_stats - keeps usage/err statistics
> + * @enabled: enable tagstats for debugfs
> + * @tag_stats: pointer to tag statistic counters
> + * @q_depth: current amount of busy slots
> + * @err_stats: counters to keep track of various errors
> + * @hibern8_exit_cnt: Counter to keep track of number of exits,
> + * reset this after link-startup.
> + * @last_hibern8_exit_tstamp: Set time after the hibern8 exit.
> + * Clear after the first successful command completion.
> + * @pa_err: tracks pa-uic errors
> + * @dl_err: tracks dl-uic errors
> + * @nl_err: tracks nl-uic errors
> + * @tl_err: tracks tl-uic errors
> + * @dme_err: tracks dme errors
> + */
> struct ufs_stats {
> +#ifdef CONFIG_DEBUG_FS
> bool enabled;
> u64 **tag_stats;
> int q_depth;
> int err_stats[UFS_ERR_MAX];
> +#endif
> + u32 hibern8_exit_cnt;
> + ktime_t last_hibern8_exit_tstamp;
> + struct ufs_uic_err_reg_hist pa_err;
> + struct ufs_uic_err_reg_hist dl_err;
> + struct ufs_uic_err_reg_hist nl_err;
> + struct ufs_uic_err_reg_hist tl_err;
> + struct ufs_uic_err_reg_hist dme_err;
> };
>
> +#ifdef CONFIG_DEBUG_FS
> struct debugfs_files {
> struct dentry *debugfs_root;
> struct dentry *tag_stats;
> @@ -326,6 +366,7 @@ struct ufs_hba_variant_ops {
> struct ufs_pa_layer_attr *);
> int (*suspend)(struct ufs_hba *, enum ufs_pm_op);
> int (*resume)(struct ufs_hba *, enum ufs_pm_op);
> + void (*dbg_register_dump)(struct ufs_hba *hba);
> };
>
> /* clock gating state */
> @@ -498,6 +539,7 @@ struct ufs_hba {
> u32 uic_error;
> u32 saved_err;
> u32 saved_uic_err;
> + bool silence_err_logs;
>
> /* Device management request data */
> struct ufs_dev_cmd dev_cmd;
> @@ -528,10 +570,13 @@ struct ufs_hba {
> struct devfreq *devfreq;
> struct ufs_clk_scaling clk_scaling;
> bool is_sys_suspended;
> -#ifdef CONFIG_DEBUG_FS
> struct ufs_stats ufs_stats;
> +#ifdef CONFIG_DEBUG_FS
> struct debugfs_files debugfs_files;
> #endif
> +
> + /* Number of requests aborts */
> + int req_abort_count;
> };
>
> /* Returns true if clocks can be gated. Otherwise false */
> diff --git a/drivers/scsi/ufs/ufshci.h b/drivers/scsi/ufs/ufshci.h
> index c8b178f..c5a0d19 100644
> --- a/drivers/scsi/ufs/ufshci.h
> +++ b/drivers/scsi/ufs/ufshci.h
> @@ -166,6 +166,7 @@ enum {
> /* UECPA - Host UIC Error Code PHY Adapter Layer 38h */
> #define UIC_PHY_ADAPTER_LAYER_ERROR UFS_BIT(31)
> #define UIC_PHY_ADAPTER_LAYER_ERROR_CODE_MASK 0x1F
> +#define UIC_PHY_ADAPTER_LAYER_LANE_ERR_MASK 0xF
>
> /* UECDL - Host UIC Error Code Data Link Layer 3Ch */
> #define UIC_DATA_LINK_LAYER_ERROR UFS_BIT(31)
> diff --git a/include/trace/events/ufs.h b/include/trace/events/ufs.h
> new file mode 100644
> index 0000000..045c6b5
> --- /dev/null
> +++ b/include/trace/events/ufs.h
> @@ -0,0 +1,227 @@
> +/*
> + * Copyright (c) 2013-2015, The Linux Foundation. All rights reserved.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 and
> + * only version 2 as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + */
> +
> +#undef TRACE_SYSTEM
> +#define TRACE_SYSTEM ufs
> +
> +#if !defined(_TRACE_UFS_H) || defined(TRACE_HEADER_MULTI_READ)
> +#define _TRACE_UFS_H
> +
> +#include <linux/tracepoint.h>
> +
> +TRACE_EVENT(ufshcd_clk_gating,
> +
> + TP_PROTO(const char *dev_name, const char *state),
> +
> + TP_ARGS(dev_name, state),
> +
> + TP_STRUCT__entry(
> + __string(dev_name, dev_name)
> + __string(state, state)
> + ),
> +
> + TP_fast_assign(
> + __assign_str(dev_name, dev_name);
> + __assign_str(state, state);
> + ),
> +
> + TP_printk("%s: gating state changed to %s",
> + __get_str(dev_name), __get_str(state))
> +);
> +
> +TRACE_EVENT(ufshcd_clk_scaling,
> +
> + TP_PROTO(const char *dev_name, const char *state, const char *clk,
> + u32 prev_state, u32 curr_state),
> +
> + TP_ARGS(dev_name, state, clk, prev_state, curr_state),
> +
> + TP_STRUCT__entry(
> + __string(dev_name, dev_name)
> + __string(state, state)
> + __string(clk, clk)
> + __field(u32, prev_state)
> + __field(u32, curr_state)
> + ),
> +
> + TP_fast_assign(
> + __assign_str(dev_name, dev_name);
> + __assign_str(state, state);
> + __assign_str(clk, clk);
> + __entry->prev_state = prev_state;
> + __entry->curr_state = curr_state;
> + ),
> +
> + TP_printk("%s: %s %s from %u to %u Hz",
> + __get_str(dev_name), __get_str(state), __get_str(clk),
> + __entry->prev_state, __entry->curr_state)
> +);
> +
> +TRACE_EVENT(ufshcd_auto_bkops_state,
> +
> + TP_PROTO(const char *dev_name, const char *state),
> +
> + TP_ARGS(dev_name, state),
> +
> + TP_STRUCT__entry(
> + __string(dev_name, dev_name)
> + __string(state, state)
> + ),
> +
> + TP_fast_assign(
> + __assign_str(dev_name, dev_name);
> + __assign_str(state, state);
> + ),
> +
> + TP_printk("%s: auto bkops - %s",
> + __get_str(dev_name), __get_str(state))
> +);
> +
> +DECLARE_EVENT_CLASS(ufshcd_profiling_template,
> + TP_PROTO(const char *dev_name, const char *profile_info, s64
> time_us,
> + int err),
> +
> + TP_ARGS(dev_name, profile_info, time_us, err),
> +
> + TP_STRUCT__entry(
> + __string(dev_name, dev_name)
> + __string(profile_info, profile_info)
> + __field(s64, time_us)
> + __field(int, err)
> + ),
> +
> + TP_fast_assign(
> + __assign_str(dev_name, dev_name);
> + __assign_str(profile_info, profile_info);
> + __entry->time_us = time_us;
> + __entry->err = err;
> + ),
> +
> + TP_printk("%s: %s: took %lld usecs, err %d",
> + __get_str(dev_name), __get_str(profile_info),
> + __entry->time_us, __entry->err)
> +);
> +
> +DEFINE_EVENT(ufshcd_profiling_template, ufshcd_profile_hibern8,
> + TP_PROTO(const char *dev_name, const char *profile_info, s64
> time_us,
> + int err),
> + TP_ARGS(dev_name, profile_info, time_us, err));
> +
> +DEFINE_EVENT(ufshcd_profiling_template, ufshcd_profile_clk_gating,
> + TP_PROTO(const char *dev_name, const char *profile_info, s64
> time_us,
> + int err),
> + TP_ARGS(dev_name, profile_info, time_us, err));
> +
> +DEFINE_EVENT(ufshcd_profiling_template, ufshcd_profile_clk_scaling,
> + TP_PROTO(const char *dev_name, const char *profile_info, s64
> time_us,
> + int err),
> + TP_ARGS(dev_name, profile_info, time_us, err));
> +
> +DECLARE_EVENT_CLASS(ufshcd_template,
> + TP_PROTO(const char *dev_name, int err, s64 usecs,
> + const char *dev_state, const char *link_state),
> +
> + TP_ARGS(dev_name, err, usecs, dev_state, link_state),
> +
> + TP_STRUCT__entry(
> + __field(s64, usecs)
> + __field(int, err)
> + __string(dev_name, dev_name)
> + __string(dev_state, dev_state)
> + __string(link_state, link_state)
> + ),
> +
> + TP_fast_assign(
> + __entry->usecs = usecs;
> + __entry->err = err;
> + __assign_str(dev_name, dev_name);
> + __assign_str(dev_state, dev_state);
> + __assign_str(link_state, link_state);
> + ),
> +
> + TP_printk(
> + "%s: took %lld usecs, dev_state: %s, link_state: %s, err
> %d",
> + __get_str(dev_name),
> + __entry->usecs,
> + __get_str(dev_state),
> + __get_str(link_state),
> + __entry->err
> + )
> +);
> +
> +DEFINE_EVENT(ufshcd_template, ufshcd_system_suspend,
> + TP_PROTO(const char *dev_name, int err, s64 usecs,
> + const char *dev_state, const char *link_state),
> + TP_ARGS(dev_name, err, usecs, dev_state, link_state));
> +
> +DEFINE_EVENT(ufshcd_template, ufshcd_system_resume,
> + TP_PROTO(const char *dev_name, int err, s64 usecs,
> + const char *dev_state, const char *link_state),
> + TP_ARGS(dev_name, err, usecs, dev_state, link_state));
> +
> +DEFINE_EVENT(ufshcd_template, ufshcd_runtime_suspend,
> + TP_PROTO(const char *dev_name, int err, s64 usecs,
> + const char *dev_state, const char *link_state),
> + TP_ARGS(dev_name, err, usecs, dev_state, link_state));
> +
> +DEFINE_EVENT(ufshcd_template, ufshcd_runtime_resume,
> + TP_PROTO(const char *dev_name, int err, s64 usecs,
> + const char *dev_state, const char *link_state),
> + TP_ARGS(dev_name, err, usecs, dev_state, link_state));
> +
> +DEFINE_EVENT(ufshcd_template, ufshcd_init,
> + TP_PROTO(const char *dev_name, int err, s64 usecs,
> + const char *dev_state, const char *link_state),
> + TP_ARGS(dev_name, err, usecs, dev_state, link_state));
> +
> +TRACE_EVENT(ufshcd_command,
> + TP_PROTO(const char *dev_name, const char *str, unsigned int tag,
> + u32 doorbell, int transfer_len, u32 intr, u64 lba,
> + u8 opcode),
> +
> + TP_ARGS(dev_name, str, tag, doorbell, transfer_len, intr, lba,
> opcode),
> +
> + TP_STRUCT__entry(
> + __string(dev_name, dev_name)
> + __string(str, str)
> + __field(unsigned int, tag)
> + __field(u32, doorbell)
> + __field(int, transfer_len)
> + __field(u32, intr)
> + __field(u64, lba)
> + __field(u8, opcode)
> + ),
> +
> + TP_fast_assign(
> + __assign_str(dev_name, dev_name);
> + __assign_str(str, str);
> + __entry->tag = tag;
> + __entry->doorbell = doorbell;
> + __entry->transfer_len = transfer_len;
> + __entry->intr = intr;
> + __entry->lba = lba;
> + __entry->opcode = opcode;
> + ),
> +
> + TP_printk(
> + "%s: %s: tag: %u, DB: 0x%x, size: %d, IS: %u, LBA: %llu,
> opcode: 0x%x",
> + __get_str(str), __get_str(dev_name), __entry->tag,
> + __entry->doorbell, __entry->transfer_len,
> + __entry->intr, __entry->lba, (u32)__entry->opcode
> + )
> +);
> +
> +#endif /* if !defined(_TRACE_UFS_H) || defined(TRACE_HEADER_MULTI_READ)
> */
> +
> +/* This part must be outside protection */
> +#include <trace/define_trace.h>
> --
> Qualcomm Israel, on behalf of Qualcomm Innovation Center, Inc.
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
> the body of a message to majordomo@...r.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
>
Reviewed-by: Dov Levenglick <dovl@...eaurora.org>
QUALCOMM ISRAEL, on behalf of Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
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