> -----Original Message-----
> From: linux-scsi-owner@xxxxxxxxxxxxxxx <linux-scsi-owner@xxxxxxxxxxxxxxx>
> On Behalf Of Christoph Hellwig
> Sent: Wednesday, February 19, 2020 8:45 AM
> To: linux-scsi@xxxxxxxxxxxxxxx
> Cc: Alim Akhtar <alim.akhtar@xxxxxxxxxxx>; Avri Altman
> <avri.altman@xxxxxxx>
> Subject: [PATCH 1/2] ufshcd: remove unused quirks
>
> Remove various quirks that don't have users, as well as the dead code
> keyed off them.
>
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>
> ---
> drivers/scsi/ufs/ufshcd.c | 120 +++++---------------------------------
> drivers/scsi/ufs/ufshcd.h | 22 -------
> 2 files changed, 13 insertions(+), 129 deletions(-)
>
> diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index
> abd0e6b05f79..2eb86851af7a 100644
> --- a/drivers/scsi/ufs/ufshcd.c
> +++ b/drivers/scsi/ufs/ufshcd.c
> @@ -642,11 +642,7 @@ static inline int ufshcd_get_tr_ocs(struct ufshcd_lrb
> *lrbp)
> */
> static inline void ufshcd_utrl_clear(struct ufs_hba *hba, u32 pos) {
> - if (hba->quirks & UFSHCI_QUIRK_BROKEN_REQ_LIST_CLR)
> - ufshcd_writel(hba, (1 << pos),
> REG_UTP_TRANSFER_REQ_LIST_CLEAR);
> - else
> - ufshcd_writel(hba, ~(1 << pos),
> - REG_UTP_TRANSFER_REQ_LIST_CLEAR);
> + ufshcd_writel(hba, (1 << pos), REG_UTP_TRANSFER_REQ_LIST_CLEAR);
> }
>
> /**
> @@ -656,10 +652,7 @@ static inline void ufshcd_utrl_clear(struct ufs_hba
> *hba, u32 pos)
> */
> static inline void ufshcd_utmrl_clear(struct ufs_hba *hba, u32 pos) {
> - if (hba->quirks & UFSHCI_QUIRK_BROKEN_REQ_LIST_CLR)
> - ufshcd_writel(hba, (1 << pos), REG_UTP_TASK_REQ_LIST_CLEAR);
> - else
> - ufshcd_writel(hba, ~(1 << pos),
REG_UTP_TASK_REQ_LIST_CLEAR);
> + ufshcd_writel(hba, ~(1 << pos), REG_UTP_TASK_REQ_LIST_CLEAR);
> }
>
> /**
> @@ -2093,13 +2086,8 @@ static int ufshcd_map_sg(struct ufs_hba *hba,
> struct ufshcd_lrb *lrbp)
> return sg_segments;
>
> if (sg_segments) {
> - if (hba->quirks & UFSHCD_QUIRK_PRDT_BYTE_GRAN)
> - lrbp->utr_descriptor_ptr->prd_table_length =
> - cpu_to_le16((u16)(sg_segments *
> - sizeof(struct ufshcd_sg_entry)));
> - else
> - lrbp->utr_descriptor_ptr->prd_table_length =
> - cpu_to_le16((u16) (sg_segments));
> + lrbp->utr_descriptor_ptr->prd_table_length =
> + cpu_to_le16((u16) (sg_segments));
>
> prd_table = (struct ufshcd_sg_entry *)lrbp->ucd_prdt_ptr;
>
> @@ -3403,21 +3391,12 @@ static void ufshcd_host_memory_configure(struct
> ufs_hba *hba)
>
> cpu_to_le32(upper_32_bits(cmd_desc_element_addr));
>
> /* Response upiu and prdt offset should be in double words
> */
> - if (hba->quirks & UFSHCD_QUIRK_PRDT_BYTE_GRAN) {
> - utrdlp[i].response_upiu_offset =
> - cpu_to_le16(response_offset);
> - utrdlp[i].prd_table_offset =
> - cpu_to_le16(prdt_offset);
> - utrdlp[i].response_upiu_length =
> - cpu_to_le16(ALIGNED_UPIU_SIZE);
> - } else {
> - utrdlp[i].response_upiu_offset =
> - cpu_to_le16((response_offset >> 2));
> - utrdlp[i].prd_table_offset =
> - cpu_to_le16((prdt_offset >> 2));
> - utrdlp[i].response_upiu_length =
> - cpu_to_le16(ALIGNED_UPIU_SIZE >> 2);
> - }
> + utrdlp[i].response_upiu_offset =
> + cpu_to_le16((response_offset >> 2));
> + utrdlp[i].prd_table_offset =
> + cpu_to_le16((prdt_offset >> 2));
> + utrdlp[i].response_upiu_length =
> + cpu_to_le16(ALIGNED_UPIU_SIZE >> 2);
>
> hba->lrb[i].utr_descriptor_ptr = (utrdlp + i);
> hba->lrb[i].utrd_dma_addr = hba->utrdl_dma_addr + @@ -
> 3460,52 +3439,6 @@ static int ufshcd_dme_link_startup(struct ufs_hba *hba)
> "dme-link-startup: error code %d\n", ret);
> return ret;
> }
> -/**
> - * ufshcd_dme_reset - UIC command for DME_RESET
> - * @hba: per adapter instance
> - *
> - * DME_RESET command is issued in order to reset UniPro stack.
> - * This function now deal with cold reset.
> - *
> - * Returns 0 on success, non-zero value on failure
> - */
> -static int ufshcd_dme_reset(struct ufs_hba *hba) -{
> - struct uic_command uic_cmd = {0};
> - int ret;
> -
> - uic_cmd.command = UIC_CMD_DME_RESET;
> -
> - ret = ufshcd_send_uic_cmd(hba, &uic_cmd);
> - if (ret)
> - dev_err(hba->dev,
> - "dme-reset: error code %d\n", ret);
> -
> - return ret;
> -}
> -
> -/**
> - * ufshcd_dme_enable - UIC command for DME_ENABLE
> - * @hba: per adapter instance
> - *
> - * DME_ENABLE command is issued in order to enable UniPro stack.
> - *
> - * Returns 0 on success, non-zero value on failure
> - */
> -static int ufshcd_dme_enable(struct ufs_hba *hba) -{
> - struct uic_command uic_cmd = {0};
> - int ret;
> -
> - uic_cmd.command = UIC_CMD_DME_ENABLE;
> -
> - ret = ufshcd_send_uic_cmd(hba, &uic_cmd);
> - if (ret)
> - dev_err(hba->dev,
> - "dme-reset: error code %d\n", ret);
> -
> - return ret;
> -}
>
> static inline void ufshcd_add_delay_before_dme_cmd(struct ufs_hba *hba)
> { @@ -4217,7 +4150,7 @@ static inline void ufshcd_hba_stop(struct ufs_hba
> *hba, bool can_sleep) }
>
> /**
> - * ufshcd_hba_execute_hce - initialize the controller
> + * ufshcd_hba_enable - initialize the controller
> * @hba: per adapter instance
> *
> * The controller resets itself and controller firmware initialization @@
> -4226,7 +4159,7 @@ static inline void ufshcd_hba_stop(struct ufs_hba *hba,
> bool can_sleep)
> *
> * Returns 0 on success, non-zero value on failure
> */
> -static int ufshcd_hba_execute_hce(struct ufs_hba *hba)
> +int ufshcd_hba_enable(struct ufs_hba *hba)
> {
> int retry;
>
> @@ -4274,32 +4207,6 @@ static int ufshcd_hba_execute_hce(struct ufs_hba
> *hba)
>
> return 0;
> }
> -
> -int ufshcd_hba_enable(struct ufs_hba *hba) -{
> - int ret;
> -
> - if (hba->quirks & UFSHCI_QUIRK_BROKEN_HCE) {
> - ufshcd_set_link_off(hba);
> - ufshcd_vops_hce_enable_notify(hba, PRE_CHANGE);
> -
> - /* enable UIC related interrupts */
> - ufshcd_enable_intr(hba, UFSHCD_UIC_MASK);
> - ret = ufshcd_dme_reset(hba);
> - if (!ret) {
> - ret = ufshcd_dme_enable(hba);
> - if (!ret)
> - ufshcd_vops_hce_enable_notify(hba,
POST_CHANGE);
> - if (ret)
> - dev_err(hba->dev,
> - "Host controller enable failed with
non-
> hce\n");
> - }
> - } else {
> - ret = ufshcd_hba_execute_hce(hba);
> - }
> -
> - return ret;
> -}
> EXPORT_SYMBOL_GPL(ufshcd_hba_enable);
>
> static int ufshcd_disable_tx_lcc(struct ufs_hba *hba, bool peer) @@ -
> 4869,8 +4776,7 @@ static irqreturn_t ufshcd_transfer_req_compl(struct
> ufs_hba *hba)
> * false interrupt if device completes another request after
> resetting
> * aggregation and before reading the DB.
> */
> - if (ufshcd_is_intr_aggr_allowed(hba) &&
> - !(hba->quirks & UFSHCI_QUIRK_SKIP_RESET_INTR_AGGR))
> + if (ufshcd_is_intr_aggr_allowed(hba))
> ufshcd_reset_intr_aggr(hba);
>
> tr_doorbell = ufshcd_readl(hba, REG_UTP_TRANSFER_REQ_DOOR_BELL);
> diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h index
> 2ae6c7c8528c..9c2b80f87b9f 100644
> --- a/drivers/scsi/ufs/ufshcd.h
> +++ b/drivers/scsi/ufs/ufshcd.h
> @@ -612,28 +612,6 @@ struct ufs_hba {
> */
> #define UFSHCD_QUIRK_BROKEN_UFS_HCI_VERSION 0x20
>
> - /*
> - * This quirk needs to be enabled if the host contoller regards
> - * resolution of the values of PRDTO and PRDTL in UTRD as byte.
> - */
> - #define UFSHCD_QUIRK_PRDT_BYTE_GRAN 0x80
> -
> - /*
> - * Clear handling for transfer/task request list is just opposite.
> - */
> - #define UFSHCI_QUIRK_BROKEN_REQ_LIST_CLR 0x100
> -
> - /*
> - * This quirk needs to be enabled if host controller doesn't allow
> - * that the interrupt aggregation timer and counter are reset by
> s/w.
> - */
> - #define UFSHCI_QUIRK_SKIP_RESET_INTR_AGGR 0x200
> -
> - /*
> - * This quirks needs to be enabled if host controller cannot be
> - * enabled via HCE register.
> - */
> - #define UFSHCI_QUIRK_BROKEN_HCE 0x400
> unsigned int quirks; /* Deviations from standard UFSHCI spec.
> */
>
> /* Device deviations from standard UFS device spec. */
> --
> 2.24.1
