diff options
Diffstat (limited to 'drivers/ufs/core/ufshcd.c')
| -rw-r--r-- | drivers/ufs/core/ufshcd.c | 186 |
1 files changed, 116 insertions, 70 deletions
diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c index 4410e7d93b7d..96ad57c3144b 100644 --- a/drivers/ufs/core/ufshcd.c +++ b/drivers/ufs/core/ufshcd.c @@ -364,6 +364,34 @@ void ufshcd_disable_irq(struct ufs_hba *hba) } EXPORT_SYMBOL_GPL(ufshcd_disable_irq); +/** + * ufshcd_enable_intr - enable interrupts + * @hba: per adapter instance + * @intrs: interrupt bits + */ +static void ufshcd_enable_intr(struct ufs_hba *hba, u32 intrs) +{ + u32 old_val = ufshcd_readl(hba, REG_INTERRUPT_ENABLE); + u32 new_val = old_val | intrs; + + if (new_val != old_val) + ufshcd_writel(hba, new_val, REG_INTERRUPT_ENABLE); +} + +/** + * ufshcd_disable_intr - disable interrupts + * @hba: per adapter instance + * @intrs: interrupt bits + */ +static void ufshcd_disable_intr(struct ufs_hba *hba, u32 intrs) +{ + u32 old_val = ufshcd_readl(hba, REG_INTERRUPT_ENABLE); + u32 new_val = old_val & ~intrs; + + if (new_val != old_val) + ufshcd_writel(hba, new_val, REG_INTERRUPT_ENABLE); +} + static void ufshcd_configure_wb(struct ufs_hba *hba) { if (!ufshcd_is_wb_allowed(hba)) @@ -2566,7 +2594,7 @@ ufshcd_wait_for_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd) * @hba: per adapter instance * @uic_cmd: UIC command * - * Return: 0 only if success. + * Return: 0 if successful; < 0 upon failure. */ static int __ufshcd_send_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd) @@ -2596,6 +2624,7 @@ __ufshcd_send_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd) */ int ufshcd_send_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd) { + unsigned long flags; int ret; if (hba->quirks & UFSHCD_QUIRK_BROKEN_UIC_CMD) @@ -2605,6 +2634,10 @@ int ufshcd_send_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd) mutex_lock(&hba->uic_cmd_mutex); ufshcd_add_delay_before_dme_cmd(hba); + spin_lock_irqsave(hba->host->host_lock, flags); + ufshcd_enable_intr(hba, UIC_COMMAND_COMPL); + spin_unlock_irqrestore(hba->host->host_lock, flags); + ret = __ufshcd_send_uic_cmd(hba, uic_cmd); if (!ret) ret = ufshcd_wait_for_uic_cmd(hba, uic_cmd); @@ -2682,32 +2715,6 @@ static int ufshcd_map_sg(struct ufs_hba *hba, struct ufshcd_lrb *lrbp) } /** - * ufshcd_enable_intr - enable interrupts - * @hba: per adapter instance - * @intrs: interrupt bits - */ -static void ufshcd_enable_intr(struct ufs_hba *hba, u32 intrs) -{ - u32 set = ufshcd_readl(hba, REG_INTERRUPT_ENABLE); - - set |= intrs; - ufshcd_writel(hba, set, REG_INTERRUPT_ENABLE); -} - -/** - * ufshcd_disable_intr - disable interrupts - * @hba: per adapter instance - * @intrs: interrupt bits - */ -static void ufshcd_disable_intr(struct ufs_hba *hba, u32 intrs) -{ - u32 set = ufshcd_readl(hba, REG_INTERRUPT_ENABLE); - - set &= ~intrs; - ufshcd_writel(hba, set, REG_INTERRUPT_ENABLE); -} - -/** * ufshcd_prepare_req_desc_hdr - Fill UTP Transfer request descriptor header according to request * descriptor according to request * @hba: per adapter instance @@ -2826,8 +2833,6 @@ static void ufshcd_prepare_utp_query_req_upiu(struct ufs_hba *hba, /* Copy the Descriptor */ if (query->request.upiu_req.opcode == UPIU_QUERY_OPCODE_WRITE_DESC) memcpy(ucd_req_ptr + 1, query->descriptor, len); - - memset(lrbp->ucd_rsp_ptr, 0, sizeof(struct utp_upiu_rsp)); } static inline void ufshcd_prepare_utp_nop_upiu(struct ufshcd_lrb *lrbp) @@ -2840,8 +2845,6 @@ static inline void ufshcd_prepare_utp_nop_upiu(struct ufshcd_lrb *lrbp) .transaction_code = UPIU_TRANSACTION_NOP_OUT, .task_tag = lrbp->task_tag, }; - - memset(lrbp->ucd_rsp_ptr, 0, sizeof(struct utp_upiu_rsp)); } /** @@ -2867,6 +2870,8 @@ static int ufshcd_compose_devman_upiu(struct ufs_hba *hba, else ret = -EINVAL; + memset(lrbp->ucd_rsp_ptr, 0, sizeof(struct utp_upiu_rsp)); + return ret; } @@ -3074,6 +3079,9 @@ static void ufshcd_setup_dev_cmd(struct ufs_hba *hba, struct ufshcd_lrb *lrbp, hba->dev_cmd.type = cmd_type; } +/* + * Return: 0 upon success; < 0 upon failure. + */ static int ufshcd_compose_dev_cmd(struct ufs_hba *hba, struct ufshcd_lrb *lrbp, enum dev_cmd_type cmd_type, int tag) { @@ -3186,9 +3194,13 @@ ufshcd_dev_cmd_completion(struct ufs_hba *hba, struct ufshcd_lrb *lrbp) break; } + WARN_ONCE(err > 0, "Incorrect return value %d > 0\n", err); return err; } +/* + * Return: 0 upon success; < 0 upon failure. + */ static int ufshcd_wait_for_dev_cmd(struct ufs_hba *hba, struct ufshcd_lrb *lrbp, int max_timeout) { @@ -3263,6 +3275,7 @@ retry: } } + WARN_ONCE(err > 0, "Incorrect return value %d > 0\n", err); return err; } @@ -3280,6 +3293,9 @@ static void ufshcd_dev_man_unlock(struct ufs_hba *hba) ufshcd_release(hba); } +/* + * Return: 0 upon success; < 0 upon failure. + */ static int ufshcd_issue_dev_cmd(struct ufs_hba *hba, struct ufshcd_lrb *lrbp, const u32 tag, int timeout) { @@ -3367,6 +3383,7 @@ static int ufshcd_query_flag_retry(struct ufs_hba *hba, dev_err(hba->dev, "%s: query flag, opcode %d, idn %d, failed with error %d after %d retries\n", __func__, opcode, idn, ret, retries); + WARN_ONCE(ret > 0, "Incorrect return value %d > 0\n", ret); return ret; } @@ -3378,7 +3395,7 @@ static int ufshcd_query_flag_retry(struct ufs_hba *hba, * @index: flag index to access * @flag_res: the flag value after the query request completes * - * Return: 0 for success, non-zero in case of failure. + * Return: 0 for success; < 0 upon failure. */ int ufshcd_query_flag(struct ufs_hba *hba, enum query_opcode opcode, enum flag_idn idn, u8 index, bool *flag_res) @@ -3434,6 +3451,7 @@ int ufshcd_query_flag(struct ufs_hba *hba, enum query_opcode opcode, out_unlock: ufshcd_dev_man_unlock(hba); + WARN_ONCE(err > 0, "Incorrect return value %d > 0\n", err); return err; } @@ -3446,7 +3464,7 @@ out_unlock: * @selector: selector field * @attr_val: the attribute value after the query request completes * - * Return: 0 for success, non-zero in case of failure. + * Return: 0 upon success; < 0 upon failure. */ int ufshcd_query_attr(struct ufs_hba *hba, enum query_opcode opcode, enum attr_idn idn, u8 index, u8 selector, u32 *attr_val) @@ -3495,6 +3513,7 @@ int ufshcd_query_attr(struct ufs_hba *hba, enum query_opcode opcode, out_unlock: ufshcd_dev_man_unlock(hba); + WARN_ONCE(err > 0, "Incorrect return value %d > 0\n", err); return err; } @@ -3509,7 +3528,7 @@ out_unlock: * @attr_val: the attribute value after the query request * completes * - * Return: 0 for success, non-zero in case of failure. + * Return: 0 for success; < 0 upon failure. */ int ufshcd_query_attr_retry(struct ufs_hba *hba, enum query_opcode opcode, enum attr_idn idn, u8 index, u8 selector, @@ -3532,9 +3551,13 @@ int ufshcd_query_attr_retry(struct ufs_hba *hba, dev_err(hba->dev, "%s: query attribute, idn %d, failed with error %d after %d retries\n", __func__, idn, ret, QUERY_REQ_RETRIES); + WARN_ONCE(ret > 0, "Incorrect return value %d > 0\n", ret); return ret; } +/* + * Return: 0 if successful; < 0 upon failure. + */ static int __ufshcd_query_descriptor(struct ufs_hba *hba, enum query_opcode opcode, enum desc_idn idn, u8 index, u8 selector, u8 *desc_buf, int *buf_len) @@ -3592,6 +3615,7 @@ static int __ufshcd_query_descriptor(struct ufs_hba *hba, out_unlock: hba->dev_cmd.query.descriptor = NULL; ufshcd_dev_man_unlock(hba); + WARN_ONCE(err > 0, "Incorrect return value %d > 0\n", err); return err; } @@ -3608,7 +3632,7 @@ out_unlock: * The buf_len parameter will contain, on return, the length parameter * received on the response. * - * Return: 0 for success, non-zero in case of failure. + * Return: 0 for success; < 0 upon failure. */ int ufshcd_query_descriptor_retry(struct ufs_hba *hba, enum query_opcode opcode, @@ -3626,6 +3650,7 @@ int ufshcd_query_descriptor_retry(struct ufs_hba *hba, break; } + WARN_ONCE(err > 0, "Incorrect return value %d > 0\n", err); return err; } @@ -3638,7 +3663,7 @@ int ufshcd_query_descriptor_retry(struct ufs_hba *hba, * @param_read_buf: pointer to buffer where parameter would be read * @param_size: sizeof(param_read_buf) * - * Return: 0 in case of success, non-zero otherwise. + * Return: 0 in case of success; < 0 upon failure. */ int ufshcd_read_desc_param(struct ufs_hba *hba, enum desc_idn desc_id, @@ -3705,6 +3730,7 @@ int ufshcd_read_desc_param(struct ufs_hba *hba, out: if (is_kmalloc) kfree(desc_buf); + WARN_ONCE(ret > 0, "Incorrect return value %d > 0\n", ret); return ret; } @@ -3818,7 +3844,7 @@ out: * @param_read_buf: pointer to buffer where parameter would be read * @param_size: sizeof(param_read_buf) * - * Return: 0 in case of success, non-zero otherwise. + * Return: 0 in case of success; < 0 upon failure. */ static inline int ufshcd_read_unit_desc_param(struct ufs_hba *hba, int lun, @@ -4254,6 +4280,30 @@ out: EXPORT_SYMBOL_GPL(ufshcd_dme_get_attr); /** + * ufshcd_dme_rmw - get modify set a DME attribute + * @hba: per adapter instance + * @mask: indicates which bits to clear from the value that has been read + * @val: actual value to write + * @attr: dme attribute + */ +int ufshcd_dme_rmw(struct ufs_hba *hba, u32 mask, + u32 val, u32 attr) +{ + u32 cfg = 0; + int err; + + err = ufshcd_dme_get(hba, UIC_ARG_MIB(attr), &cfg); + if (err) + return err; + + cfg &= ~mask; + cfg |= (val & mask); + + return ufshcd_dme_set(hba, UIC_ARG_MIB(attr), cfg); +} +EXPORT_SYMBOL_GPL(ufshcd_dme_rmw); + +/** * ufshcd_uic_pwr_ctrl - executes UIC commands (which affects the link power * state) and waits for it to take effect. * @@ -4275,7 +4325,6 @@ static int ufshcd_uic_pwr_ctrl(struct ufs_hba *hba, struct uic_command *cmd) unsigned long flags; u8 status; int ret; - bool reenable_intr = false; mutex_lock(&hba->uic_cmd_mutex); ufshcd_add_delay_before_dme_cmd(hba); @@ -4286,15 +4335,7 @@ static int ufshcd_uic_pwr_ctrl(struct ufs_hba *hba, struct uic_command *cmd) goto out_unlock; } hba->uic_async_done = &uic_async_done; - if (ufshcd_readl(hba, REG_INTERRUPT_ENABLE) & UIC_COMMAND_COMPL) { - ufshcd_disable_intr(hba, UIC_COMMAND_COMPL); - /* - * Make sure UIC command completion interrupt is disabled before - * issuing UIC command. - */ - ufshcd_readl(hba, REG_INTERRUPT_ENABLE); - reenable_intr = true; - } + ufshcd_disable_intr(hba, UIC_COMMAND_COMPL); spin_unlock_irqrestore(hba->host->host_lock, flags); ret = __ufshcd_send_uic_cmd(hba, cmd); if (ret) { @@ -4338,9 +4379,7 @@ out: spin_lock_irqsave(hba->host->host_lock, flags); hba->active_uic_cmd = NULL; hba->uic_async_done = NULL; - if (reenable_intr) - ufshcd_enable_intr(hba, UIC_COMMAND_COMPL); - if (ret) { + if (ret && !hba->pm_op_in_progress) { ufshcd_set_link_broken(hba); ufshcd_schedule_eh_work(hba); } @@ -4348,6 +4387,14 @@ out_unlock: spin_unlock_irqrestore(hba->host->host_lock, flags); mutex_unlock(&hba->uic_cmd_mutex); + /* + * If the h8 exit fails during the runtime resume process, it becomes + * stuck and cannot be recovered through the error handler. To fix + * this, use link recovery instead of the error handler. + */ + if (ret && hba->pm_op_in_progress) + ret = ufshcd_link_recovery(hba); + return ret; } @@ -4362,28 +4409,17 @@ int ufshcd_send_bsg_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd) { int ret; + if (uic_cmd->argument1 != UIC_ARG_MIB(PA_PWRMODE) || + uic_cmd->command != UIC_CMD_DME_SET) + return ufshcd_send_uic_cmd(hba, uic_cmd); + if (hba->quirks & UFSHCD_QUIRK_BROKEN_UIC_CMD) return 0; ufshcd_hold(hba); - - if (uic_cmd->argument1 == UIC_ARG_MIB(PA_PWRMODE) && - uic_cmd->command == UIC_CMD_DME_SET) { - ret = ufshcd_uic_pwr_ctrl(hba, uic_cmd); - goto out; - } - - mutex_lock(&hba->uic_cmd_mutex); - ufshcd_add_delay_before_dme_cmd(hba); - - ret = __ufshcd_send_uic_cmd(hba, uic_cmd); - if (!ret) - ret = ufshcd_wait_for_uic_cmd(hba, uic_cmd); - - mutex_unlock(&hba->uic_cmd_mutex); - -out: + ret = ufshcd_uic_pwr_ctrl(hba, uic_cmd); ufshcd_release(hba); + return ret; } @@ -4796,7 +4832,7 @@ out: * 3. Program UTRL and UTMRL base address * 4. Configure run-stop-registers * - * Return: 0 on success, non-zero value on failure. + * Return: 0 if successful; < 0 upon failure. */ int ufshcd_make_hba_operational(struct ufs_hba *hba) { @@ -6623,9 +6659,14 @@ static void ufshcd_err_handler(struct work_struct *work) up(&hba->host_sem); return; } - ufshcd_set_eh_in_progress(hba); spin_unlock_irqrestore(hba->host->host_lock, flags); + ufshcd_err_handling_prepare(hba); + + spin_lock_irqsave(hba->host->host_lock, flags); + ufshcd_set_eh_in_progress(hba); + spin_unlock_irqrestore(hba->host->host_lock, flags); + /* Complete requests that have door-bell cleared by h/w */ ufshcd_complete_requests(hba, false); spin_lock_irqsave(hba->host->host_lock, flags); @@ -7802,7 +7843,8 @@ static int ufshcd_host_reset_and_restore(struct ufs_hba *hba) hba->silence_err_logs = false; /* scale up clocks to max frequency before full reinitialization */ - ufshcd_scale_clks(hba, ULONG_MAX, true); + if (ufshcd_is_clkscaling_supported(hba)) + ufshcd_scale_clks(hba, ULONG_MAX, true); err = ufshcd_hba_enable(hba); @@ -8414,6 +8456,10 @@ static int ufs_get_device_desc(struct ufs_hba *hba) dev_info->rtt_cap = desc_buf[DEVICE_DESC_PARAM_RTT_CAP]; + dev_info->hid_sup = get_unaligned_be32(desc_buf + + DEVICE_DESC_PARAM_EXT_UFS_FEATURE_SUP) & + UFS_DEV_HID_SUPPORT; + model_index = desc_buf[DEVICE_DESC_PARAM_PRDCT_NAME]; err = ufshcd_read_string_desc(hba, model_index, |