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Date: Fri, 2 Dec 2022 13:08:18 +0530
From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To: Andrew Halaney <ahalaney@...hat.com>
Cc: andersson@...nel.org, agross@...nel.org, konrad.dybcio@...aro.org,
jejb@...ux.ibm.com, martin.petersen@...cle.com,
p.zabel@...gutronix.de, linux-arm-msm@...r.kernel.org,
linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/4] scsi: ufs: ufs-qcom: Clean up dbg_register_dump
On Thu, Dec 01, 2022 at 05:08:08PM -0600, Andrew Halaney wrote:
> The current implementation has abstractions that don't give any
> benefits.
>
> The print_fn callback (and its only callback implementation,
> ufs_qcom_dump_regs_wrapper()) was only used by
> ufs_qcom_print_hw_debug_reg_all() and just multiplies len by 4
> before calling ufshcd_dump_regs().
>
> ufs_qcom_print_hw_debug_reg_all() is only called by
> ufs_qcom_dump_dbg_regs().
>
> There's no real gain in those abstractions, so let's just do the work
> directly in ufs_qcom_dump_dbg_regs() (the dbg_register_dump callback).
>
> Signed-off-by: Andrew Halaney <ahalaney@...hat.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Thanks,
Mani
> ---
> drivers/ufs/host/ufs-qcom.c | 106 ++++++++++++++++--------------------
> 1 file changed, 47 insertions(+), 59 deletions(-)
>
> diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
> index 70e25f9f8ca8..1b0dfbbdcdf3 100644
> --- a/drivers/ufs/host/ufs-qcom.c
> +++ b/drivers/ufs/host/ufs-qcom.c
> @@ -52,12 +52,6 @@ static struct ufs_qcom_host *rcdev_to_ufs_host(struct reset_controller_dev *rcd)
> return container_of(rcd, struct ufs_qcom_host, rcdev);
> }
>
> -static void ufs_qcom_dump_regs_wrapper(struct ufs_hba *hba, int offset, int len,
> - const char *prefix, void *priv)
> -{
> - ufshcd_dump_regs(hba, offset, len * 4, prefix);
> -}
> -
> static int ufs_qcom_host_clk_get(struct device *dev,
> const char *name, struct clk **clk_out, bool optional)
> {
> @@ -1195,58 +1189,6 @@ static int ufs_qcom_clk_scale_notify(struct ufs_hba *hba,
> return err;
> }
>
> -static void ufs_qcom_print_hw_debug_reg_all(struct ufs_hba *hba,
> - void *priv, void (*print_fn)(struct ufs_hba *hba,
> - int offset, int num_regs, const char *str, void *priv))
> -{
> - u32 reg;
> - struct ufs_qcom_host *host;
> -
> - host = ufshcd_get_variant(hba);
> - if (!(host->dbg_print_en & UFS_QCOM_DBG_PRINT_REGS_EN))
> - return;
> -
> - reg = ufs_qcom_get_debug_reg_offset(host, UFS_UFS_DBG_RD_REG_OCSC);
> - print_fn(hba, reg, 44, "UFS_UFS_DBG_RD_REG_OCSC ", priv);
> -
> - reg = ufshcd_readl(hba, REG_UFS_CFG1);
> - reg |= UTP_DBG_RAMS_EN;
> - ufshcd_writel(hba, reg, REG_UFS_CFG1);
> -
> - reg = ufs_qcom_get_debug_reg_offset(host, UFS_UFS_DBG_RD_EDTL_RAM);
> - print_fn(hba, reg, 32, "UFS_UFS_DBG_RD_EDTL_RAM ", priv);
> -
> - reg = ufs_qcom_get_debug_reg_offset(host, UFS_UFS_DBG_RD_DESC_RAM);
> - print_fn(hba, reg, 128, "UFS_UFS_DBG_RD_DESC_RAM ", priv);
> -
> - reg = ufs_qcom_get_debug_reg_offset(host, UFS_UFS_DBG_RD_PRDT_RAM);
> - print_fn(hba, reg, 64, "UFS_UFS_DBG_RD_PRDT_RAM ", priv);
> -
> - /* clear bit 17 - UTP_DBG_RAMS_EN */
> - ufshcd_rmwl(hba, UTP_DBG_RAMS_EN, 0, REG_UFS_CFG1);
> -
> - reg = ufs_qcom_get_debug_reg_offset(host, UFS_DBG_RD_REG_UAWM);
> - print_fn(hba, reg, 4, "UFS_DBG_RD_REG_UAWM ", priv);
> -
> - reg = ufs_qcom_get_debug_reg_offset(host, UFS_DBG_RD_REG_UARM);
> - print_fn(hba, reg, 4, "UFS_DBG_RD_REG_UARM ", priv);
> -
> - reg = ufs_qcom_get_debug_reg_offset(host, UFS_DBG_RD_REG_TXUC);
> - print_fn(hba, reg, 48, "UFS_DBG_RD_REG_TXUC ", priv);
> -
> - reg = ufs_qcom_get_debug_reg_offset(host, UFS_DBG_RD_REG_RXUC);
> - print_fn(hba, reg, 27, "UFS_DBG_RD_REG_RXUC ", priv);
> -
> - reg = ufs_qcom_get_debug_reg_offset(host, UFS_DBG_RD_REG_DFC);
> - print_fn(hba, reg, 19, "UFS_DBG_RD_REG_DFC ", priv);
> -
> - reg = ufs_qcom_get_debug_reg_offset(host, UFS_DBG_RD_REG_TRLUT);
> - print_fn(hba, reg, 34, "UFS_DBG_RD_REG_TRLUT ", priv);
> -
> - reg = ufs_qcom_get_debug_reg_offset(host, UFS_DBG_RD_REG_TMRLUT);
> - print_fn(hba, reg, 9, "UFS_DBG_RD_REG_TMRLUT ", priv);
> -}
> -
> static void ufs_qcom_enable_test_bus(struct ufs_qcom_host *host)
> {
> if (host->dbg_print_en & UFS_QCOM_DBG_PRINT_TEST_BUS_EN) {
> @@ -1365,10 +1307,56 @@ int ufs_qcom_testbus_config(struct ufs_qcom_host *host)
>
> static void ufs_qcom_dump_dbg_regs(struct ufs_hba *hba)
> {
> + u32 reg;
> + struct ufs_qcom_host *host;
> +
> + host = ufshcd_get_variant(hba);
> +
> ufshcd_dump_regs(hba, REG_UFS_SYS1CLK_1US, 16 * 4,
> "HCI Vendor Specific Registers ");
>
> - ufs_qcom_print_hw_debug_reg_all(hba, NULL, ufs_qcom_dump_regs_wrapper);
> + if (!(host->dbg_print_en & UFS_QCOM_DBG_PRINT_REGS_EN))
> + return;
> +
> + reg = ufs_qcom_get_debug_reg_offset(host, UFS_UFS_DBG_RD_REG_OCSC);
> + ufshcd_dump_regs(hba, reg, 44 * 4, "UFS_UFS_DBG_RD_REG_OCSC ");
> +
> + reg = ufshcd_readl(hba, REG_UFS_CFG1);
> + reg |= UTP_DBG_RAMS_EN;
> + ufshcd_writel(hba, reg, REG_UFS_CFG1);
> +
> + reg = ufs_qcom_get_debug_reg_offset(host, UFS_UFS_DBG_RD_EDTL_RAM);
> + ufshcd_dump_regs(hba, reg, 32 * 4, "UFS_UFS_DBG_RD_EDTL_RAM ");
> +
> + reg = ufs_qcom_get_debug_reg_offset(host, UFS_UFS_DBG_RD_DESC_RAM);
> + ufshcd_dump_regs(hba, reg, 128 * 4, "UFS_UFS_DBG_RD_DESC_RAM ");
> +
> + reg = ufs_qcom_get_debug_reg_offset(host, UFS_UFS_DBG_RD_PRDT_RAM);
> + ufshcd_dump_regs(hba, reg, 64 * 4, "UFS_UFS_DBG_RD_PRDT_RAM ");
> +
> + /* clear bit 17 - UTP_DBG_RAMS_EN */
> + ufshcd_rmwl(hba, UTP_DBG_RAMS_EN, 0, REG_UFS_CFG1);
> +
> + reg = ufs_qcom_get_debug_reg_offset(host, UFS_DBG_RD_REG_UAWM);
> + ufshcd_dump_regs(hba, reg, 4 * 4, "UFS_DBG_RD_REG_UAWM ");
> +
> + reg = ufs_qcom_get_debug_reg_offset(host, UFS_DBG_RD_REG_UARM);
> + ufshcd_dump_regs(hba, reg, 4 * 4, "UFS_DBG_RD_REG_UARM ");
> +
> + reg = ufs_qcom_get_debug_reg_offset(host, UFS_DBG_RD_REG_TXUC);
> + ufshcd_dump_regs(hba, reg, 48 * 4, "UFS_DBG_RD_REG_TXUC ");
> +
> + reg = ufs_qcom_get_debug_reg_offset(host, UFS_DBG_RD_REG_RXUC);
> + ufshcd_dump_regs(hba, reg, 27 * 4, "UFS_DBG_RD_REG_RXUC ");
> +
> + reg = ufs_qcom_get_debug_reg_offset(host, UFS_DBG_RD_REG_DFC);
> + ufshcd_dump_regs(hba, reg, 19 * 4, "UFS_DBG_RD_REG_DFC ");
> +
> + reg = ufs_qcom_get_debug_reg_offset(host, UFS_DBG_RD_REG_TRLUT);
> + ufshcd_dump_regs(hba, reg, 34 * 4, "UFS_DBG_RD_REG_TRLUT ");
> +
> + reg = ufs_qcom_get_debug_reg_offset(host, UFS_DBG_RD_REG_TMRLUT);
> + ufshcd_dump_regs(hba, reg, 9 * 4, "UFS_DBG_RD_REG_TMRLUT ");
> }
>
> /**
> --
> 2.38.1
>
--
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