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scsi: ufs-qcom: Remove unused MSM bus scaling APIs
MSM bus scaling has moved on to use interconnect framework and downstream bus scaling APIs like msm_bus_scale*() do not exist anymore in the kernel. Currently they are guarded by a config which also does not exist and hence there are no build failures reported. Remove these unused interfaces as they are currently no-ops and the scaling support that may be added in future will use interconnect API. Link: https://lore.kernel.org/r/20200804161033.15586-1-saiprakash.ranjan@codeaurora.org Signed-off-by: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Sai Prakash Ranjan
Martin K. Petersen
parent
ce60a2b827
commit
68bdb3db6c
2 changed files with 1 additions and 235 deletions
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@ -621,218 +621,6 @@ static int ufs_qcom_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op)
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return 0;
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}
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#ifdef CONFIG_MSM_BUS_SCALING
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static int ufs_qcom_get_bus_vote(struct ufs_qcom_host *host,
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const char *speed_mode)
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{
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struct device *dev = host->hba->dev;
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struct device_node *np = dev->of_node;
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int err;
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const char *key = "qcom,bus-vector-names";
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if (!speed_mode) {
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err = -EINVAL;
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goto out;
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}
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if (host->bus_vote.is_max_bw_needed && !!strcmp(speed_mode, "MIN"))
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err = of_property_match_string(np, key, "MAX");
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else
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err = of_property_match_string(np, key, speed_mode);
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out:
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if (err < 0)
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dev_err(dev, "%s: Invalid %s mode %d\n",
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__func__, speed_mode, err);
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return err;
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}
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static void ufs_qcom_get_speed_mode(struct ufs_pa_layer_attr *p, char *result)
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{
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int gear = max_t(u32, p->gear_rx, p->gear_tx);
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int lanes = max_t(u32, p->lane_rx, p->lane_tx);
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int pwr;
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/* default to PWM Gear 1, Lane 1 if power mode is not initialized */
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if (!gear)
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gear = 1;
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if (!lanes)
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lanes = 1;
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if (!p->pwr_rx && !p->pwr_tx) {
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pwr = SLOWAUTO_MODE;
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snprintf(result, BUS_VECTOR_NAME_LEN, "MIN");
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} else if (p->pwr_rx == FAST_MODE || p->pwr_rx == FASTAUTO_MODE ||
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p->pwr_tx == FAST_MODE || p->pwr_tx == FASTAUTO_MODE) {
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pwr = FAST_MODE;
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snprintf(result, BUS_VECTOR_NAME_LEN, "%s_R%s_G%d_L%d", "HS",
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p->hs_rate == PA_HS_MODE_B ? "B" : "A", gear, lanes);
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} else {
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pwr = SLOW_MODE;
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snprintf(result, BUS_VECTOR_NAME_LEN, "%s_G%d_L%d",
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"PWM", gear, lanes);
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}
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}
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static int __ufs_qcom_set_bus_vote(struct ufs_qcom_host *host, int vote)
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{
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int err = 0;
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if (vote != host->bus_vote.curr_vote) {
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err = msm_bus_scale_client_update_request(
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host->bus_vote.client_handle, vote);
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if (err) {
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dev_err(host->hba->dev,
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"%s: msm_bus_scale_client_update_request() failed: bus_client_handle=0x%x, vote=%d, err=%d\n",
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__func__, host->bus_vote.client_handle,
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vote, err);
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goto out;
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}
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host->bus_vote.curr_vote = vote;
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}
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out:
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return err;
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}
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static int ufs_qcom_update_bus_bw_vote(struct ufs_qcom_host *host)
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{
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int vote;
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int err = 0;
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char mode[BUS_VECTOR_NAME_LEN];
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ufs_qcom_get_speed_mode(&host->dev_req_params, mode);
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vote = ufs_qcom_get_bus_vote(host, mode);
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if (vote >= 0)
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err = __ufs_qcom_set_bus_vote(host, vote);
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else
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err = vote;
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if (err)
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dev_err(host->hba->dev, "%s: failed %d\n", __func__, err);
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else
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host->bus_vote.saved_vote = vote;
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return err;
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}
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static int ufs_qcom_set_bus_vote(struct ufs_hba *hba, bool on)
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{
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struct ufs_qcom_host *host = ufshcd_get_variant(hba);
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int vote, err;
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/*
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* In case ufs_qcom_init() is not yet done, simply ignore.
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* This ufs_qcom_set_bus_vote() shall be called from
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* ufs_qcom_init() after init is done.
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*/
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if (!host)
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return 0;
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if (on) {
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vote = host->bus_vote.saved_vote;
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if (vote == host->bus_vote.min_bw_vote)
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ufs_qcom_update_bus_bw_vote(host);
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} else {
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vote = host->bus_vote.min_bw_vote;
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}
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err = __ufs_qcom_set_bus_vote(host, vote);
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if (err)
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dev_err(hba->dev, "%s: set bus vote failed %d\n",
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__func__, err);
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return err;
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}
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static ssize_t
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show_ufs_to_mem_max_bus_bw(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct ufs_hba *hba = dev_get_drvdata(dev);
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struct ufs_qcom_host *host = ufshcd_get_variant(hba);
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return snprintf(buf, PAGE_SIZE, "%u\n",
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host->bus_vote.is_max_bw_needed);
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}
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static ssize_t
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store_ufs_to_mem_max_bus_bw(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct ufs_hba *hba = dev_get_drvdata(dev);
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struct ufs_qcom_host *host = ufshcd_get_variant(hba);
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uint32_t value;
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if (!kstrtou32(buf, 0, &value)) {
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host->bus_vote.is_max_bw_needed = !!value;
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ufs_qcom_update_bus_bw_vote(host);
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}
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return count;
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}
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static int ufs_qcom_bus_register(struct ufs_qcom_host *host)
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{
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int err;
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struct msm_bus_scale_pdata *bus_pdata;
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struct device *dev = host->hba->dev;
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struct platform_device *pdev = to_platform_device(dev);
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struct device_node *np = dev->of_node;
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bus_pdata = msm_bus_cl_get_pdata(pdev);
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if (!bus_pdata) {
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dev_err(dev, "%s: failed to get bus vectors\n", __func__);
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err = -ENODATA;
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goto out;
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}
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err = of_property_count_strings(np, "qcom,bus-vector-names");
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if (err < 0 || err != bus_pdata->num_usecases) {
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dev_err(dev, "%s: qcom,bus-vector-names not specified correctly %d\n",
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__func__, err);
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goto out;
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}
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host->bus_vote.client_handle = msm_bus_scale_register_client(bus_pdata);
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if (!host->bus_vote.client_handle) {
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dev_err(dev, "%s: msm_bus_scale_register_client failed\n",
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__func__);
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err = -EFAULT;
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goto out;
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}
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/* cache the vote index for minimum and maximum bandwidth */
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host->bus_vote.min_bw_vote = ufs_qcom_get_bus_vote(host, "MIN");
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host->bus_vote.max_bw_vote = ufs_qcom_get_bus_vote(host, "MAX");
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host->bus_vote.max_bus_bw.show = show_ufs_to_mem_max_bus_bw;
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host->bus_vote.max_bus_bw.store = store_ufs_to_mem_max_bus_bw;
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sysfs_attr_init(&host->bus_vote.max_bus_bw.attr);
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host->bus_vote.max_bus_bw.attr.name = "max_bus_bw";
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host->bus_vote.max_bus_bw.attr.mode = S_IRUGO | S_IWUSR;
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err = device_create_file(dev, &host->bus_vote.max_bus_bw);
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out:
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return err;
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}
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#else /* CONFIG_MSM_BUS_SCALING */
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static int ufs_qcom_update_bus_bw_vote(struct ufs_qcom_host *host)
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{
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return 0;
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}
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static int ufs_qcom_set_bus_vote(struct ufs_hba *host, bool on)
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{
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return 0;
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}
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static int ufs_qcom_bus_register(struct ufs_qcom_host *host)
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{
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return 0;
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}
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#endif /* CONFIG_MSM_BUS_SCALING */
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static void ufs_qcom_dev_ref_clk_ctrl(struct ufs_qcom_host *host, bool enable)
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{
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if (host->dev_ref_clk_ctrl_mmio &&
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@ -976,7 +764,6 @@ static int ufs_qcom_pwr_change_notify(struct ufs_hba *hba,
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/* cache the power mode parameters to use internally */
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memcpy(&host->dev_req_params,
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dev_req_params, sizeof(*dev_req_params));
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ufs_qcom_update_bus_bw_vote(host);
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/* disable the device ref clock if entered PWM mode */
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if (ufshcd_is_hs_mode(&hba->pwr_info) &&
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@ -1107,9 +894,7 @@ static int ufs_qcom_setup_clocks(struct ufs_hba *hba, bool on,
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switch (status) {
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case PRE_CHANGE:
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if (on) {
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err = ufs_qcom_set_bus_vote(hba, true);
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} else {
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if (!on) {
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if (!ufs_qcom_is_link_active(hba)) {
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/* disable device ref_clk */
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ufs_qcom_dev_ref_clk_ctrl(host, false);
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@ -1121,8 +906,6 @@ static int ufs_qcom_setup_clocks(struct ufs_hba *hba, bool on,
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/* enable the device ref clock for HS mode*/
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if (ufshcd_is_hs_mode(&hba->pwr_info))
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ufs_qcom_dev_ref_clk_ctrl(host, true);
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} else {
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err = ufs_qcom_set_bus_vote(hba, false);
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}
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break;
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}
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@ -1264,10 +1047,6 @@ static int ufs_qcom_init(struct ufs_hba *hba)
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goto out_variant_clear;
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}
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err = ufs_qcom_bus_register(host);
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if (err)
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goto out_variant_clear;
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ufs_qcom_get_controller_revision(hba, &host->hw_ver.major,
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&host->hw_ver.minor, &host->hw_ver.step);
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@ -1307,7 +1086,6 @@ static int ufs_qcom_init(struct ufs_hba *hba)
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if (err)
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goto out_variant_clear;
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ufs_qcom_set_bus_vote(hba, true);
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ufs_qcom_setup_clocks(hba, true, POST_CHANGE);
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if (hba->dev->id < MAX_UFS_QCOM_HOSTS)
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@ -1446,7 +1224,6 @@ static int ufs_qcom_clk_scale_notify(struct ufs_hba *hba,
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dev_req_params->pwr_rx,
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dev_req_params->hs_rate,
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false);
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ufs_qcom_update_bus_bw_vote(host);
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}
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out:
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@ -174,16 +174,6 @@ static inline void ufs_qcom_deassert_reset(struct ufs_hba *hba)
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mb();
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}
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struct ufs_qcom_bus_vote {
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uint32_t client_handle;
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uint32_t curr_vote;
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int min_bw_vote;
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int max_bw_vote;
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int saved_vote;
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bool is_max_bw_needed;
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struct device_attribute max_bus_bw;
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};
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/* Host controller hardware version: major.minor.step */
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struct ufs_hw_version {
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u16 step;
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@ -216,7 +206,6 @@ struct ufs_qcom_host {
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struct phy *generic_phy;
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struct ufs_hba *hba;
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struct ufs_qcom_bus_vote bus_vote;
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struct ufs_pa_layer_attr dev_req_params;
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struct clk *rx_l0_sync_clk;
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struct clk *tx_l0_sync_clk;
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