forked from Minki/linux
4264fd613a
Some UFS devices may expose bLUQueueDepth field as zero indicating that the queue depth depends on the number of resources available for LUN at a particular instant to handle the outstanding transfer requests. Currently, when response for SCSI command is TASK_FULL the LLD decrements the queue depth but fails to increment when the resources are available. The scsi mid-layer handles the change in queue depth heuristically and offers simple interface with ->change_queue_depth. Signed-off-by: Sujit Reddy Thumma <sthumma@codeaurora.org> Signed-off-by: Dolev Raviv <draviv@codeaurora.org> Acked-by: Santosh Y <santoshsy@gmail.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
3378 lines
87 KiB
C
3378 lines
87 KiB
C
/*
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* Universal Flash Storage Host controller driver Core
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*
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* This code is based on drivers/scsi/ufs/ufshcd.c
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* Copyright (C) 2011-2013 Samsung India Software Operations
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*
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* Authors:
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* Santosh Yaraganavi <santosh.sy@samsung.com>
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* Vinayak Holikatti <h.vinayak@samsung.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* See the COPYING file in the top-level directory or visit
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* <http://www.gnu.org/licenses/gpl-2.0.html>
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* This program is provided "AS IS" and "WITH ALL FAULTS" and
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* without warranty of any kind. You are solely responsible for
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* determining the appropriateness of using and distributing
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* the program and assume all risks associated with your exercise
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* of rights with respect to the program, including but not limited
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* to infringement of third party rights, the risks and costs of
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* program errors, damage to or loss of data, programs or equipment,
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* and unavailability or interruption of operations. Under no
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* circumstances will the contributor of this Program be liable for
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* any damages of any kind arising from your use or distribution of
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* this program.
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*/
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#include <linux/async.h>
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#include "ufshcd.h"
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#include "unipro.h"
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#define UFSHCD_ENABLE_INTRS (UTP_TRANSFER_REQ_COMPL |\
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UTP_TASK_REQ_COMPL |\
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UIC_POWER_MODE |\
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UFSHCD_ERROR_MASK)
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/* UIC command timeout, unit: ms */
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#define UIC_CMD_TIMEOUT 500
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/* NOP OUT retries waiting for NOP IN response */
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#define NOP_OUT_RETRIES 10
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/* Timeout after 30 msecs if NOP OUT hangs without response */
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#define NOP_OUT_TIMEOUT 30 /* msecs */
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/* Query request retries */
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#define QUERY_REQ_RETRIES 10
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/* Query request timeout */
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#define QUERY_REQ_TIMEOUT 30 /* msec */
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/* Task management command timeout */
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#define TM_CMD_TIMEOUT 100 /* msecs */
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/* Expose the flag value from utp_upiu_query.value */
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#define MASK_QUERY_UPIU_FLAG_LOC 0xFF
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/* Interrupt aggregation default timeout, unit: 40us */
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#define INT_AGGR_DEF_TO 0x02
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enum {
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UFSHCD_MAX_CHANNEL = 0,
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UFSHCD_MAX_ID = 1,
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UFSHCD_MAX_LUNS = 8,
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UFSHCD_CMD_PER_LUN = 32,
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UFSHCD_CAN_QUEUE = 32,
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};
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/* UFSHCD states */
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enum {
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UFSHCD_STATE_RESET,
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UFSHCD_STATE_ERROR,
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UFSHCD_STATE_OPERATIONAL,
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};
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/* UFSHCD error handling flags */
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enum {
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UFSHCD_EH_IN_PROGRESS = (1 << 0),
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};
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/* UFSHCD UIC layer error flags */
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enum {
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UFSHCD_UIC_DL_PA_INIT_ERROR = (1 << 0), /* Data link layer error */
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UFSHCD_UIC_NL_ERROR = (1 << 1), /* Network layer error */
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UFSHCD_UIC_TL_ERROR = (1 << 2), /* Transport Layer error */
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UFSHCD_UIC_DME_ERROR = (1 << 3), /* DME error */
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};
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/* Interrupt configuration options */
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enum {
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UFSHCD_INT_DISABLE,
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UFSHCD_INT_ENABLE,
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UFSHCD_INT_CLEAR,
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};
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#define ufshcd_set_eh_in_progress(h) \
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(h->eh_flags |= UFSHCD_EH_IN_PROGRESS)
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#define ufshcd_eh_in_progress(h) \
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(h->eh_flags & UFSHCD_EH_IN_PROGRESS)
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#define ufshcd_clear_eh_in_progress(h) \
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(h->eh_flags &= ~UFSHCD_EH_IN_PROGRESS)
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static void ufshcd_tmc_handler(struct ufs_hba *hba);
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static void ufshcd_async_scan(void *data, async_cookie_t cookie);
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static int ufshcd_reset_and_restore(struct ufs_hba *hba);
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static int ufshcd_clear_tm_cmd(struct ufs_hba *hba, int tag);
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static int ufshcd_read_sdev_qdepth(struct ufs_hba *hba,
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struct scsi_device *sdev);
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/*
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* ufshcd_wait_for_register - wait for register value to change
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* @hba - per-adapter interface
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* @reg - mmio register offset
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* @mask - mask to apply to read register value
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* @val - wait condition
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* @interval_us - polling interval in microsecs
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* @timeout_ms - timeout in millisecs
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*
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* Returns -ETIMEDOUT on error, zero on success
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*/
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static int ufshcd_wait_for_register(struct ufs_hba *hba, u32 reg, u32 mask,
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u32 val, unsigned long interval_us, unsigned long timeout_ms)
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{
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int err = 0;
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unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
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/* ignore bits that we don't intend to wait on */
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val = val & mask;
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while ((ufshcd_readl(hba, reg) & mask) != val) {
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/* wakeup within 50us of expiry */
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usleep_range(interval_us, interval_us + 50);
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if (time_after(jiffies, timeout)) {
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if ((ufshcd_readl(hba, reg) & mask) != val)
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err = -ETIMEDOUT;
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break;
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}
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}
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return err;
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}
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/**
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* ufshcd_get_intr_mask - Get the interrupt bit mask
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* @hba - Pointer to adapter instance
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*
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* Returns interrupt bit mask per version
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*/
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static inline u32 ufshcd_get_intr_mask(struct ufs_hba *hba)
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{
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if (hba->ufs_version == UFSHCI_VERSION_10)
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return INTERRUPT_MASK_ALL_VER_10;
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else
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return INTERRUPT_MASK_ALL_VER_11;
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}
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/**
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* ufshcd_get_ufs_version - Get the UFS version supported by the HBA
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* @hba - Pointer to adapter instance
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*
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* Returns UFSHCI version supported by the controller
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*/
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static inline u32 ufshcd_get_ufs_version(struct ufs_hba *hba)
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{
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return ufshcd_readl(hba, REG_UFS_VERSION);
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}
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/**
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* ufshcd_is_device_present - Check if any device connected to
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* the host controller
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* @reg_hcs - host controller status register value
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*
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* Returns 1 if device present, 0 if no device detected
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*/
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static inline int ufshcd_is_device_present(u32 reg_hcs)
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{
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return (DEVICE_PRESENT & reg_hcs) ? 1 : 0;
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}
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/**
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* ufshcd_get_tr_ocs - Get the UTRD Overall Command Status
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* @lrb: pointer to local command reference block
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*
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* This function is used to get the OCS field from UTRD
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* Returns the OCS field in the UTRD
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*/
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static inline int ufshcd_get_tr_ocs(struct ufshcd_lrb *lrbp)
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{
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return le32_to_cpu(lrbp->utr_descriptor_ptr->header.dword_2) & MASK_OCS;
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}
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/**
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* ufshcd_get_tmr_ocs - Get the UTMRD Overall Command Status
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* @task_req_descp: pointer to utp_task_req_desc structure
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*
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* This function is used to get the OCS field from UTMRD
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* Returns the OCS field in the UTMRD
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*/
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static inline int
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ufshcd_get_tmr_ocs(struct utp_task_req_desc *task_req_descp)
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{
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return le32_to_cpu(task_req_descp->header.dword_2) & MASK_OCS;
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}
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/**
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* ufshcd_get_tm_free_slot - get a free slot for task management request
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* @hba: per adapter instance
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* @free_slot: pointer to variable with available slot value
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*
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* Get a free tag and lock it until ufshcd_put_tm_slot() is called.
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* Returns 0 if free slot is not available, else return 1 with tag value
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* in @free_slot.
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*/
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static bool ufshcd_get_tm_free_slot(struct ufs_hba *hba, int *free_slot)
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{
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int tag;
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bool ret = false;
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if (!free_slot)
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goto out;
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do {
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tag = find_first_zero_bit(&hba->tm_slots_in_use, hba->nutmrs);
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if (tag >= hba->nutmrs)
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goto out;
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} while (test_and_set_bit_lock(tag, &hba->tm_slots_in_use));
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*free_slot = tag;
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ret = true;
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out:
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return ret;
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}
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static inline void ufshcd_put_tm_slot(struct ufs_hba *hba, int slot)
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{
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clear_bit_unlock(slot, &hba->tm_slots_in_use);
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}
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/**
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* ufshcd_utrl_clear - Clear a bit in UTRLCLR register
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* @hba: per adapter instance
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* @pos: position of the bit to be cleared
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*/
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static inline void ufshcd_utrl_clear(struct ufs_hba *hba, u32 pos)
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{
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ufshcd_writel(hba, ~(1 << pos), REG_UTP_TRANSFER_REQ_LIST_CLEAR);
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}
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/**
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* ufshcd_get_lists_status - Check UCRDY, UTRLRDY and UTMRLRDY
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* @reg: Register value of host controller status
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*
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* Returns integer, 0 on Success and positive value if failed
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*/
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static inline int ufshcd_get_lists_status(u32 reg)
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{
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/*
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* The mask 0xFF is for the following HCS register bits
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* Bit Description
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* 0 Device Present
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* 1 UTRLRDY
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* 2 UTMRLRDY
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* 3 UCRDY
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* 4 HEI
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* 5 DEI
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* 6-7 reserved
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*/
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return (((reg) & (0xFF)) >> 1) ^ (0x07);
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}
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/**
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* ufshcd_get_uic_cmd_result - Get the UIC command result
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* @hba: Pointer to adapter instance
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*
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* This function gets the result of UIC command completion
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* Returns 0 on success, non zero value on error
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*/
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static inline int ufshcd_get_uic_cmd_result(struct ufs_hba *hba)
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{
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return ufshcd_readl(hba, REG_UIC_COMMAND_ARG_2) &
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MASK_UIC_COMMAND_RESULT;
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}
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/**
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* ufshcd_get_dme_attr_val - Get the value of attribute returned by UIC command
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* @hba: Pointer to adapter instance
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*
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* This function gets UIC command argument3
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* Returns 0 on success, non zero value on error
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*/
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static inline u32 ufshcd_get_dme_attr_val(struct ufs_hba *hba)
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{
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return ufshcd_readl(hba, REG_UIC_COMMAND_ARG_3);
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}
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/**
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* ufshcd_get_req_rsp - returns the TR response transaction type
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* @ucd_rsp_ptr: pointer to response UPIU
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*/
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static inline int
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ufshcd_get_req_rsp(struct utp_upiu_rsp *ucd_rsp_ptr)
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{
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return be32_to_cpu(ucd_rsp_ptr->header.dword_0) >> 24;
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}
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/**
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* ufshcd_get_rsp_upiu_result - Get the result from response UPIU
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* @ucd_rsp_ptr: pointer to response UPIU
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*
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* This function gets the response status and scsi_status from response UPIU
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* Returns the response result code.
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*/
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static inline int
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ufshcd_get_rsp_upiu_result(struct utp_upiu_rsp *ucd_rsp_ptr)
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{
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return be32_to_cpu(ucd_rsp_ptr->header.dword_1) & MASK_RSP_UPIU_RESULT;
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}
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/*
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* ufshcd_get_rsp_upiu_data_seg_len - Get the data segment length
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* from response UPIU
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* @ucd_rsp_ptr: pointer to response UPIU
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*
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* Return the data segment length.
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*/
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static inline unsigned int
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ufshcd_get_rsp_upiu_data_seg_len(struct utp_upiu_rsp *ucd_rsp_ptr)
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{
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return be32_to_cpu(ucd_rsp_ptr->header.dword_2) &
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MASK_RSP_UPIU_DATA_SEG_LEN;
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}
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/**
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* ufshcd_is_exception_event - Check if the device raised an exception event
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* @ucd_rsp_ptr: pointer to response UPIU
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*
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* The function checks if the device raised an exception event indicated in
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* the Device Information field of response UPIU.
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*
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* Returns true if exception is raised, false otherwise.
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*/
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static inline bool ufshcd_is_exception_event(struct utp_upiu_rsp *ucd_rsp_ptr)
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{
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return be32_to_cpu(ucd_rsp_ptr->header.dword_2) &
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MASK_RSP_EXCEPTION_EVENT ? true : false;
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}
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/**
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* ufshcd_reset_intr_aggr - Reset interrupt aggregation values.
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* @hba: per adapter instance
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*/
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static inline void
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ufshcd_reset_intr_aggr(struct ufs_hba *hba)
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{
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ufshcd_writel(hba, INT_AGGR_ENABLE |
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INT_AGGR_COUNTER_AND_TIMER_RESET,
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REG_UTP_TRANSFER_REQ_INT_AGG_CONTROL);
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}
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/**
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* ufshcd_config_intr_aggr - Configure interrupt aggregation values.
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* @hba: per adapter instance
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* @cnt: Interrupt aggregation counter threshold
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* @tmout: Interrupt aggregation timeout value
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*/
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static inline void
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ufshcd_config_intr_aggr(struct ufs_hba *hba, u8 cnt, u8 tmout)
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{
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ufshcd_writel(hba, INT_AGGR_ENABLE | INT_AGGR_PARAM_WRITE |
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INT_AGGR_COUNTER_THLD_VAL(cnt) |
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INT_AGGR_TIMEOUT_VAL(tmout),
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REG_UTP_TRANSFER_REQ_INT_AGG_CONTROL);
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}
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/**
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* ufshcd_enable_run_stop_reg - Enable run-stop registers,
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* When run-stop registers are set to 1, it indicates the
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* host controller that it can process the requests
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* @hba: per adapter instance
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*/
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static void ufshcd_enable_run_stop_reg(struct ufs_hba *hba)
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{
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ufshcd_writel(hba, UTP_TASK_REQ_LIST_RUN_STOP_BIT,
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REG_UTP_TASK_REQ_LIST_RUN_STOP);
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ufshcd_writel(hba, UTP_TRANSFER_REQ_LIST_RUN_STOP_BIT,
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REG_UTP_TRANSFER_REQ_LIST_RUN_STOP);
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}
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/**
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* ufshcd_hba_start - Start controller initialization sequence
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* @hba: per adapter instance
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*/
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static inline void ufshcd_hba_start(struct ufs_hba *hba)
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{
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ufshcd_writel(hba, CONTROLLER_ENABLE, REG_CONTROLLER_ENABLE);
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}
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|
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/**
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* ufshcd_is_hba_active - Get controller state
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* @hba: per adapter instance
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*
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* Returns zero if controller is active, 1 otherwise
|
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*/
|
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static inline int ufshcd_is_hba_active(struct ufs_hba *hba)
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{
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return (ufshcd_readl(hba, REG_CONTROLLER_ENABLE) & 0x1) ? 0 : 1;
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}
|
|
|
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/**
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* ufshcd_send_command - Send SCSI or device management commands
|
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* @hba: per adapter instance
|
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* @task_tag: Task tag of the command
|
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*/
|
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static inline
|
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void ufshcd_send_command(struct ufs_hba *hba, unsigned int task_tag)
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{
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__set_bit(task_tag, &hba->outstanding_reqs);
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ufshcd_writel(hba, 1 << task_tag, REG_UTP_TRANSFER_REQ_DOOR_BELL);
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}
|
|
|
|
/**
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* ufshcd_copy_sense_data - Copy sense data in case of check condition
|
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* @lrb - pointer to local reference block
|
|
*/
|
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static inline void ufshcd_copy_sense_data(struct ufshcd_lrb *lrbp)
|
|
{
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int len;
|
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if (lrbp->sense_buffer &&
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ufshcd_get_rsp_upiu_data_seg_len(lrbp->ucd_rsp_ptr)) {
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len = be16_to_cpu(lrbp->ucd_rsp_ptr->sr.sense_data_len);
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memcpy(lrbp->sense_buffer,
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lrbp->ucd_rsp_ptr->sr.sense_data,
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min_t(int, len, SCSI_SENSE_BUFFERSIZE));
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}
|
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}
|
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|
|
/**
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|
* ufshcd_copy_query_response() - Copy the Query Response and the data
|
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* descriptor
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* @hba: per adapter instance
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* @lrb - pointer to local reference block
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|
*/
|
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static
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int ufshcd_copy_query_response(struct ufs_hba *hba, struct ufshcd_lrb *lrbp)
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{
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struct ufs_query_res *query_res = &hba->dev_cmd.query.response;
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|
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memcpy(&query_res->upiu_res, &lrbp->ucd_rsp_ptr->qr, QUERY_OSF_SIZE);
|
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|
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/* Get the descriptor */
|
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if (lrbp->ucd_rsp_ptr->qr.opcode == UPIU_QUERY_OPCODE_READ_DESC) {
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u8 *descp = (u8 *)lrbp->ucd_rsp_ptr +
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GENERAL_UPIU_REQUEST_SIZE;
|
|
u16 resp_len;
|
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u16 buf_len;
|
|
|
|
/* data segment length */
|
|
resp_len = be32_to_cpu(lrbp->ucd_rsp_ptr->header.dword_2) &
|
|
MASK_QUERY_DATA_SEG_LEN;
|
|
buf_len = hba->dev_cmd.query.request.upiu_req.length;
|
|
if (likely(buf_len >= resp_len)) {
|
|
memcpy(hba->dev_cmd.query.descriptor, descp, resp_len);
|
|
} else {
|
|
dev_warn(hba->dev,
|
|
"%s: Response size is bigger than buffer",
|
|
__func__);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_hba_capabilities - Read controller capabilities
|
|
* @hba: per adapter instance
|
|
*/
|
|
static inline void ufshcd_hba_capabilities(struct ufs_hba *hba)
|
|
{
|
|
hba->capabilities = ufshcd_readl(hba, REG_CONTROLLER_CAPABILITIES);
|
|
|
|
/* nutrs and nutmrs are 0 based values */
|
|
hba->nutrs = (hba->capabilities & MASK_TRANSFER_REQUESTS_SLOTS) + 1;
|
|
hba->nutmrs =
|
|
((hba->capabilities & MASK_TASK_MANAGEMENT_REQUEST_SLOTS) >> 16) + 1;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_ready_for_uic_cmd - Check if controller is ready
|
|
* to accept UIC commands
|
|
* @hba: per adapter instance
|
|
* Return true on success, else false
|
|
*/
|
|
static inline bool ufshcd_ready_for_uic_cmd(struct ufs_hba *hba)
|
|
{
|
|
if (ufshcd_readl(hba, REG_CONTROLLER_STATUS) & UIC_COMMAND_READY)
|
|
return true;
|
|
else
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_get_upmcrs - Get the power mode change request status
|
|
* @hba: Pointer to adapter instance
|
|
*
|
|
* This function gets the UPMCRS field of HCS register
|
|
* Returns value of UPMCRS field
|
|
*/
|
|
static inline u8 ufshcd_get_upmcrs(struct ufs_hba *hba)
|
|
{
|
|
return (ufshcd_readl(hba, REG_CONTROLLER_STATUS) >> 8) & 0x7;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_dispatch_uic_cmd - Dispatch UIC commands to unipro layers
|
|
* @hba: per adapter instance
|
|
* @uic_cmd: UIC command
|
|
*
|
|
* Mutex must be held.
|
|
*/
|
|
static inline void
|
|
ufshcd_dispatch_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd)
|
|
{
|
|
WARN_ON(hba->active_uic_cmd);
|
|
|
|
hba->active_uic_cmd = uic_cmd;
|
|
|
|
/* Write Args */
|
|
ufshcd_writel(hba, uic_cmd->argument1, REG_UIC_COMMAND_ARG_1);
|
|
ufshcd_writel(hba, uic_cmd->argument2, REG_UIC_COMMAND_ARG_2);
|
|
ufshcd_writel(hba, uic_cmd->argument3, REG_UIC_COMMAND_ARG_3);
|
|
|
|
/* Write UIC Cmd */
|
|
ufshcd_writel(hba, uic_cmd->command & COMMAND_OPCODE_MASK,
|
|
REG_UIC_COMMAND);
|
|
}
|
|
|
|
/**
|
|
* ufshcd_wait_for_uic_cmd - Wait complectioin of UIC command
|
|
* @hba: per adapter instance
|
|
* @uic_command: UIC command
|
|
*
|
|
* Must be called with mutex held.
|
|
* Returns 0 only if success.
|
|
*/
|
|
static int
|
|
ufshcd_wait_for_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd)
|
|
{
|
|
int ret;
|
|
unsigned long flags;
|
|
|
|
if (wait_for_completion_timeout(&uic_cmd->done,
|
|
msecs_to_jiffies(UIC_CMD_TIMEOUT)))
|
|
ret = uic_cmd->argument2 & MASK_UIC_COMMAND_RESULT;
|
|
else
|
|
ret = -ETIMEDOUT;
|
|
|
|
spin_lock_irqsave(hba->host->host_lock, flags);
|
|
hba->active_uic_cmd = NULL;
|
|
spin_unlock_irqrestore(hba->host->host_lock, flags);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* __ufshcd_send_uic_cmd - Send UIC commands and retrieve the result
|
|
* @hba: per adapter instance
|
|
* @uic_cmd: UIC command
|
|
*
|
|
* Identical to ufshcd_send_uic_cmd() expect mutex. Must be called
|
|
* with mutex held.
|
|
* Returns 0 only if success.
|
|
*/
|
|
static int
|
|
__ufshcd_send_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd)
|
|
{
|
|
int ret;
|
|
unsigned long flags;
|
|
|
|
if (!ufshcd_ready_for_uic_cmd(hba)) {
|
|
dev_err(hba->dev,
|
|
"Controller not ready to accept UIC commands\n");
|
|
return -EIO;
|
|
}
|
|
|
|
init_completion(&uic_cmd->done);
|
|
|
|
spin_lock_irqsave(hba->host->host_lock, flags);
|
|
ufshcd_dispatch_uic_cmd(hba, uic_cmd);
|
|
spin_unlock_irqrestore(hba->host->host_lock, flags);
|
|
|
|
ret = ufshcd_wait_for_uic_cmd(hba, uic_cmd);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_send_uic_cmd - Send UIC commands and retrieve the result
|
|
* @hba: per adapter instance
|
|
* @uic_cmd: UIC command
|
|
*
|
|
* Returns 0 only if success.
|
|
*/
|
|
static int
|
|
ufshcd_send_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd)
|
|
{
|
|
int ret;
|
|
|
|
mutex_lock(&hba->uic_cmd_mutex);
|
|
ret = __ufshcd_send_uic_cmd(hba, uic_cmd);
|
|
mutex_unlock(&hba->uic_cmd_mutex);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_map_sg - Map scatter-gather list to prdt
|
|
* @lrbp - pointer to local reference block
|
|
*
|
|
* Returns 0 in case of success, non-zero value in case of failure
|
|
*/
|
|
static int ufshcd_map_sg(struct ufshcd_lrb *lrbp)
|
|
{
|
|
struct ufshcd_sg_entry *prd_table;
|
|
struct scatterlist *sg;
|
|
struct scsi_cmnd *cmd;
|
|
int sg_segments;
|
|
int i;
|
|
|
|
cmd = lrbp->cmd;
|
|
sg_segments = scsi_dma_map(cmd);
|
|
if (sg_segments < 0)
|
|
return sg_segments;
|
|
|
|
if (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;
|
|
|
|
scsi_for_each_sg(cmd, sg, sg_segments, i) {
|
|
prd_table[i].size =
|
|
cpu_to_le32(((u32) sg_dma_len(sg))-1);
|
|
prd_table[i].base_addr =
|
|
cpu_to_le32(lower_32_bits(sg->dma_address));
|
|
prd_table[i].upper_addr =
|
|
cpu_to_le32(upper_32_bits(sg->dma_address));
|
|
}
|
|
} else {
|
|
lrbp->utr_descriptor_ptr->prd_table_length = 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* 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);
|
|
|
|
if (hba->ufs_version == UFSHCI_VERSION_10) {
|
|
u32 rw;
|
|
rw = set & INTERRUPT_MASK_RW_VER_10;
|
|
set = rw | ((set ^ intrs) & intrs);
|
|
} else {
|
|
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);
|
|
|
|
if (hba->ufs_version == UFSHCI_VERSION_10) {
|
|
u32 rw;
|
|
rw = (set & INTERRUPT_MASK_RW_VER_10) &
|
|
~(intrs & INTERRUPT_MASK_RW_VER_10);
|
|
set = rw | ((set & intrs) & ~INTERRUPT_MASK_RW_VER_10);
|
|
|
|
} else {
|
|
set &= ~intrs;
|
|
}
|
|
|
|
ufshcd_writel(hba, set, REG_INTERRUPT_ENABLE);
|
|
}
|
|
|
|
/**
|
|
* ufshcd_prepare_req_desc_hdr() - Fills the requests header
|
|
* descriptor according to request
|
|
* @lrbp: pointer to local reference block
|
|
* @upiu_flags: flags required in the header
|
|
* @cmd_dir: requests data direction
|
|
*/
|
|
static void ufshcd_prepare_req_desc_hdr(struct ufshcd_lrb *lrbp,
|
|
u32 *upiu_flags, enum dma_data_direction cmd_dir)
|
|
{
|
|
struct utp_transfer_req_desc *req_desc = lrbp->utr_descriptor_ptr;
|
|
u32 data_direction;
|
|
u32 dword_0;
|
|
|
|
if (cmd_dir == DMA_FROM_DEVICE) {
|
|
data_direction = UTP_DEVICE_TO_HOST;
|
|
*upiu_flags = UPIU_CMD_FLAGS_READ;
|
|
} else if (cmd_dir == DMA_TO_DEVICE) {
|
|
data_direction = UTP_HOST_TO_DEVICE;
|
|
*upiu_flags = UPIU_CMD_FLAGS_WRITE;
|
|
} else {
|
|
data_direction = UTP_NO_DATA_TRANSFER;
|
|
*upiu_flags = UPIU_CMD_FLAGS_NONE;
|
|
}
|
|
|
|
dword_0 = data_direction | (lrbp->command_type
|
|
<< UPIU_COMMAND_TYPE_OFFSET);
|
|
if (lrbp->intr_cmd)
|
|
dword_0 |= UTP_REQ_DESC_INT_CMD;
|
|
|
|
/* Transfer request descriptor header fields */
|
|
req_desc->header.dword_0 = cpu_to_le32(dword_0);
|
|
|
|
/*
|
|
* assigning invalid value for command status. Controller
|
|
* updates OCS on command completion, with the command
|
|
* status
|
|
*/
|
|
req_desc->header.dword_2 =
|
|
cpu_to_le32(OCS_INVALID_COMMAND_STATUS);
|
|
}
|
|
|
|
/**
|
|
* ufshcd_prepare_utp_scsi_cmd_upiu() - fills the utp_transfer_req_desc,
|
|
* for scsi commands
|
|
* @lrbp - local reference block pointer
|
|
* @upiu_flags - flags
|
|
*/
|
|
static
|
|
void ufshcd_prepare_utp_scsi_cmd_upiu(struct ufshcd_lrb *lrbp, u32 upiu_flags)
|
|
{
|
|
struct utp_upiu_req *ucd_req_ptr = lrbp->ucd_req_ptr;
|
|
|
|
/* command descriptor fields */
|
|
ucd_req_ptr->header.dword_0 = UPIU_HEADER_DWORD(
|
|
UPIU_TRANSACTION_COMMAND, upiu_flags,
|
|
lrbp->lun, lrbp->task_tag);
|
|
ucd_req_ptr->header.dword_1 = UPIU_HEADER_DWORD(
|
|
UPIU_COMMAND_SET_TYPE_SCSI, 0, 0, 0);
|
|
|
|
/* Total EHS length and Data segment length will be zero */
|
|
ucd_req_ptr->header.dword_2 = 0;
|
|
|
|
ucd_req_ptr->sc.exp_data_transfer_len =
|
|
cpu_to_be32(lrbp->cmd->sdb.length);
|
|
|
|
memcpy(ucd_req_ptr->sc.cdb, lrbp->cmd->cmnd,
|
|
(min_t(unsigned short, lrbp->cmd->cmd_len, MAX_CDB_SIZE)));
|
|
}
|
|
|
|
/**
|
|
* ufshcd_prepare_utp_query_req_upiu() - fills the utp_transfer_req_desc,
|
|
* for query requsts
|
|
* @hba: UFS hba
|
|
* @lrbp: local reference block pointer
|
|
* @upiu_flags: flags
|
|
*/
|
|
static void ufshcd_prepare_utp_query_req_upiu(struct ufs_hba *hba,
|
|
struct ufshcd_lrb *lrbp, u32 upiu_flags)
|
|
{
|
|
struct utp_upiu_req *ucd_req_ptr = lrbp->ucd_req_ptr;
|
|
struct ufs_query *query = &hba->dev_cmd.query;
|
|
u16 len = be16_to_cpu(query->request.upiu_req.length);
|
|
u8 *descp = (u8 *)lrbp->ucd_req_ptr + GENERAL_UPIU_REQUEST_SIZE;
|
|
|
|
/* Query request header */
|
|
ucd_req_ptr->header.dword_0 = UPIU_HEADER_DWORD(
|
|
UPIU_TRANSACTION_QUERY_REQ, upiu_flags,
|
|
lrbp->lun, lrbp->task_tag);
|
|
ucd_req_ptr->header.dword_1 = UPIU_HEADER_DWORD(
|
|
0, query->request.query_func, 0, 0);
|
|
|
|
/* Data segment length */
|
|
ucd_req_ptr->header.dword_2 = UPIU_HEADER_DWORD(
|
|
0, 0, len >> 8, (u8)len);
|
|
|
|
/* Copy the Query Request buffer as is */
|
|
memcpy(&ucd_req_ptr->qr, &query->request.upiu_req,
|
|
QUERY_OSF_SIZE);
|
|
|
|
/* Copy the Descriptor */
|
|
if (query->request.upiu_req.opcode == UPIU_QUERY_OPCODE_WRITE_DESC)
|
|
memcpy(descp, query->descriptor, len);
|
|
|
|
}
|
|
|
|
static inline void ufshcd_prepare_utp_nop_upiu(struct ufshcd_lrb *lrbp)
|
|
{
|
|
struct utp_upiu_req *ucd_req_ptr = lrbp->ucd_req_ptr;
|
|
|
|
memset(ucd_req_ptr, 0, sizeof(struct utp_upiu_req));
|
|
|
|
/* command descriptor fields */
|
|
ucd_req_ptr->header.dword_0 =
|
|
UPIU_HEADER_DWORD(
|
|
UPIU_TRANSACTION_NOP_OUT, 0, 0, lrbp->task_tag);
|
|
}
|
|
|
|
/**
|
|
* ufshcd_compose_upiu - form UFS Protocol Information Unit(UPIU)
|
|
* @hba - per adapter instance
|
|
* @lrb - pointer to local reference block
|
|
*/
|
|
static int ufshcd_compose_upiu(struct ufs_hba *hba, struct ufshcd_lrb *lrbp)
|
|
{
|
|
u32 upiu_flags;
|
|
int ret = 0;
|
|
|
|
switch (lrbp->command_type) {
|
|
case UTP_CMD_TYPE_SCSI:
|
|
if (likely(lrbp->cmd)) {
|
|
ufshcd_prepare_req_desc_hdr(lrbp, &upiu_flags,
|
|
lrbp->cmd->sc_data_direction);
|
|
ufshcd_prepare_utp_scsi_cmd_upiu(lrbp, upiu_flags);
|
|
} else {
|
|
ret = -EINVAL;
|
|
}
|
|
break;
|
|
case UTP_CMD_TYPE_DEV_MANAGE:
|
|
ufshcd_prepare_req_desc_hdr(lrbp, &upiu_flags, DMA_NONE);
|
|
if (hba->dev_cmd.type == DEV_CMD_TYPE_QUERY)
|
|
ufshcd_prepare_utp_query_req_upiu(
|
|
hba, lrbp, upiu_flags);
|
|
else if (hba->dev_cmd.type == DEV_CMD_TYPE_NOP)
|
|
ufshcd_prepare_utp_nop_upiu(lrbp);
|
|
else
|
|
ret = -EINVAL;
|
|
break;
|
|
case UTP_CMD_TYPE_UFS:
|
|
/* For UFS native command implementation */
|
|
ret = -ENOTSUPP;
|
|
dev_err(hba->dev, "%s: UFS native command are not supported\n",
|
|
__func__);
|
|
break;
|
|
default:
|
|
ret = -ENOTSUPP;
|
|
dev_err(hba->dev, "%s: unknown command type: 0x%x\n",
|
|
__func__, lrbp->command_type);
|
|
break;
|
|
} /* end of switch */
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_queuecommand - main entry point for SCSI requests
|
|
* @cmd: command from SCSI Midlayer
|
|
* @done: call back function
|
|
*
|
|
* Returns 0 for success, non-zero in case of failure
|
|
*/
|
|
static int ufshcd_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
|
|
{
|
|
struct ufshcd_lrb *lrbp;
|
|
struct ufs_hba *hba;
|
|
unsigned long flags;
|
|
int tag;
|
|
int err = 0;
|
|
|
|
hba = shost_priv(host);
|
|
|
|
tag = cmd->request->tag;
|
|
|
|
spin_lock_irqsave(hba->host->host_lock, flags);
|
|
switch (hba->ufshcd_state) {
|
|
case UFSHCD_STATE_OPERATIONAL:
|
|
break;
|
|
case UFSHCD_STATE_RESET:
|
|
err = SCSI_MLQUEUE_HOST_BUSY;
|
|
goto out_unlock;
|
|
case UFSHCD_STATE_ERROR:
|
|
set_host_byte(cmd, DID_ERROR);
|
|
cmd->scsi_done(cmd);
|
|
goto out_unlock;
|
|
default:
|
|
dev_WARN_ONCE(hba->dev, 1, "%s: invalid state %d\n",
|
|
__func__, hba->ufshcd_state);
|
|
set_host_byte(cmd, DID_BAD_TARGET);
|
|
cmd->scsi_done(cmd);
|
|
goto out_unlock;
|
|
}
|
|
spin_unlock_irqrestore(hba->host->host_lock, flags);
|
|
|
|
/* acquire the tag to make sure device cmds don't use it */
|
|
if (test_and_set_bit_lock(tag, &hba->lrb_in_use)) {
|
|
/*
|
|
* Dev manage command in progress, requeue the command.
|
|
* Requeuing the command helps in cases where the request *may*
|
|
* find different tag instead of waiting for dev manage command
|
|
* completion.
|
|
*/
|
|
err = SCSI_MLQUEUE_HOST_BUSY;
|
|
goto out;
|
|
}
|
|
|
|
lrbp = &hba->lrb[tag];
|
|
|
|
WARN_ON(lrbp->cmd);
|
|
lrbp->cmd = cmd;
|
|
lrbp->sense_bufflen = SCSI_SENSE_BUFFERSIZE;
|
|
lrbp->sense_buffer = cmd->sense_buffer;
|
|
lrbp->task_tag = tag;
|
|
lrbp->lun = cmd->device->lun;
|
|
lrbp->intr_cmd = false;
|
|
lrbp->command_type = UTP_CMD_TYPE_SCSI;
|
|
|
|
/* form UPIU before issuing the command */
|
|
ufshcd_compose_upiu(hba, lrbp);
|
|
err = ufshcd_map_sg(lrbp);
|
|
if (err) {
|
|
lrbp->cmd = NULL;
|
|
clear_bit_unlock(tag, &hba->lrb_in_use);
|
|
goto out;
|
|
}
|
|
|
|
/* issue command to the controller */
|
|
spin_lock_irqsave(hba->host->host_lock, flags);
|
|
ufshcd_send_command(hba, tag);
|
|
out_unlock:
|
|
spin_unlock_irqrestore(hba->host->host_lock, flags);
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
static int ufshcd_compose_dev_cmd(struct ufs_hba *hba,
|
|
struct ufshcd_lrb *lrbp, enum dev_cmd_type cmd_type, int tag)
|
|
{
|
|
lrbp->cmd = NULL;
|
|
lrbp->sense_bufflen = 0;
|
|
lrbp->sense_buffer = NULL;
|
|
lrbp->task_tag = tag;
|
|
lrbp->lun = 0; /* device management cmd is not specific to any LUN */
|
|
lrbp->command_type = UTP_CMD_TYPE_DEV_MANAGE;
|
|
lrbp->intr_cmd = true; /* No interrupt aggregation */
|
|
hba->dev_cmd.type = cmd_type;
|
|
|
|
return ufshcd_compose_upiu(hba, lrbp);
|
|
}
|
|
|
|
static int
|
|
ufshcd_clear_cmd(struct ufs_hba *hba, int tag)
|
|
{
|
|
int err = 0;
|
|
unsigned long flags;
|
|
u32 mask = 1 << tag;
|
|
|
|
/* clear outstanding transaction before retry */
|
|
spin_lock_irqsave(hba->host->host_lock, flags);
|
|
ufshcd_utrl_clear(hba, tag);
|
|
spin_unlock_irqrestore(hba->host->host_lock, flags);
|
|
|
|
/*
|
|
* wait for for h/w to clear corresponding bit in door-bell.
|
|
* max. wait is 1 sec.
|
|
*/
|
|
err = ufshcd_wait_for_register(hba,
|
|
REG_UTP_TRANSFER_REQ_DOOR_BELL,
|
|
mask, ~mask, 1000, 1000);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int
|
|
ufshcd_check_query_response(struct ufs_hba *hba, struct ufshcd_lrb *lrbp)
|
|
{
|
|
struct ufs_query_res *query_res = &hba->dev_cmd.query.response;
|
|
|
|
/* Get the UPIU response */
|
|
query_res->response = ufshcd_get_rsp_upiu_result(lrbp->ucd_rsp_ptr) >>
|
|
UPIU_RSP_CODE_OFFSET;
|
|
return query_res->response;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_dev_cmd_completion() - handles device management command responses
|
|
* @hba: per adapter instance
|
|
* @lrbp: pointer to local reference block
|
|
*/
|
|
static int
|
|
ufshcd_dev_cmd_completion(struct ufs_hba *hba, struct ufshcd_lrb *lrbp)
|
|
{
|
|
int resp;
|
|
int err = 0;
|
|
|
|
resp = ufshcd_get_req_rsp(lrbp->ucd_rsp_ptr);
|
|
|
|
switch (resp) {
|
|
case UPIU_TRANSACTION_NOP_IN:
|
|
if (hba->dev_cmd.type != DEV_CMD_TYPE_NOP) {
|
|
err = -EINVAL;
|
|
dev_err(hba->dev, "%s: unexpected response %x\n",
|
|
__func__, resp);
|
|
}
|
|
break;
|
|
case UPIU_TRANSACTION_QUERY_RSP:
|
|
err = ufshcd_check_query_response(hba, lrbp);
|
|
if (!err)
|
|
err = ufshcd_copy_query_response(hba, lrbp);
|
|
break;
|
|
case UPIU_TRANSACTION_REJECT_UPIU:
|
|
/* TODO: handle Reject UPIU Response */
|
|
err = -EPERM;
|
|
dev_err(hba->dev, "%s: Reject UPIU not fully implemented\n",
|
|
__func__);
|
|
break;
|
|
default:
|
|
err = -EINVAL;
|
|
dev_err(hba->dev, "%s: Invalid device management cmd response: %x\n",
|
|
__func__, resp);
|
|
break;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int ufshcd_wait_for_dev_cmd(struct ufs_hba *hba,
|
|
struct ufshcd_lrb *lrbp, int max_timeout)
|
|
{
|
|
int err = 0;
|
|
unsigned long time_left;
|
|
unsigned long flags;
|
|
|
|
time_left = wait_for_completion_timeout(hba->dev_cmd.complete,
|
|
msecs_to_jiffies(max_timeout));
|
|
|
|
spin_lock_irqsave(hba->host->host_lock, flags);
|
|
hba->dev_cmd.complete = NULL;
|
|
if (likely(time_left)) {
|
|
err = ufshcd_get_tr_ocs(lrbp);
|
|
if (!err)
|
|
err = ufshcd_dev_cmd_completion(hba, lrbp);
|
|
}
|
|
spin_unlock_irqrestore(hba->host->host_lock, flags);
|
|
|
|
if (!time_left) {
|
|
err = -ETIMEDOUT;
|
|
if (!ufshcd_clear_cmd(hba, lrbp->task_tag))
|
|
/* sucessfully cleared the command, retry if needed */
|
|
err = -EAGAIN;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_get_dev_cmd_tag - Get device management command tag
|
|
* @hba: per-adapter instance
|
|
* @tag: pointer to variable with available slot value
|
|
*
|
|
* Get a free slot and lock it until device management command
|
|
* completes.
|
|
*
|
|
* Returns false if free slot is unavailable for locking, else
|
|
* return true with tag value in @tag.
|
|
*/
|
|
static bool ufshcd_get_dev_cmd_tag(struct ufs_hba *hba, int *tag_out)
|
|
{
|
|
int tag;
|
|
bool ret = false;
|
|
unsigned long tmp;
|
|
|
|
if (!tag_out)
|
|
goto out;
|
|
|
|
do {
|
|
tmp = ~hba->lrb_in_use;
|
|
tag = find_last_bit(&tmp, hba->nutrs);
|
|
if (tag >= hba->nutrs)
|
|
goto out;
|
|
} while (test_and_set_bit_lock(tag, &hba->lrb_in_use));
|
|
|
|
*tag_out = tag;
|
|
ret = true;
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static inline void ufshcd_put_dev_cmd_tag(struct ufs_hba *hba, int tag)
|
|
{
|
|
clear_bit_unlock(tag, &hba->lrb_in_use);
|
|
}
|
|
|
|
/**
|
|
* ufshcd_exec_dev_cmd - API for sending device management requests
|
|
* @hba - UFS hba
|
|
* @cmd_type - specifies the type (NOP, Query...)
|
|
* @timeout - time in seconds
|
|
*
|
|
* NOTE: Since there is only one available tag for device management commands,
|
|
* it is expected you hold the hba->dev_cmd.lock mutex.
|
|
*/
|
|
static int ufshcd_exec_dev_cmd(struct ufs_hba *hba,
|
|
enum dev_cmd_type cmd_type, int timeout)
|
|
{
|
|
struct ufshcd_lrb *lrbp;
|
|
int err;
|
|
int tag;
|
|
struct completion wait;
|
|
unsigned long flags;
|
|
|
|
/*
|
|
* Get free slot, sleep if slots are unavailable.
|
|
* Even though we use wait_event() which sleeps indefinitely,
|
|
* the maximum wait time is bounded by SCSI request timeout.
|
|
*/
|
|
wait_event(hba->dev_cmd.tag_wq, ufshcd_get_dev_cmd_tag(hba, &tag));
|
|
|
|
init_completion(&wait);
|
|
lrbp = &hba->lrb[tag];
|
|
WARN_ON(lrbp->cmd);
|
|
err = ufshcd_compose_dev_cmd(hba, lrbp, cmd_type, tag);
|
|
if (unlikely(err))
|
|
goto out_put_tag;
|
|
|
|
hba->dev_cmd.complete = &wait;
|
|
|
|
spin_lock_irqsave(hba->host->host_lock, flags);
|
|
ufshcd_send_command(hba, tag);
|
|
spin_unlock_irqrestore(hba->host->host_lock, flags);
|
|
|
|
err = ufshcd_wait_for_dev_cmd(hba, lrbp, timeout);
|
|
|
|
out_put_tag:
|
|
ufshcd_put_dev_cmd_tag(hba, tag);
|
|
wake_up(&hba->dev_cmd.tag_wq);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_init_query() - init the query response and request parameters
|
|
* @hba: per-adapter instance
|
|
* @request: address of the request pointer to be initialized
|
|
* @response: address of the response pointer to be initialized
|
|
* @opcode: operation to perform
|
|
* @idn: flag idn to access
|
|
* @index: LU number to access
|
|
* @selector: query/flag/descriptor further identification
|
|
*/
|
|
static inline void ufshcd_init_query(struct ufs_hba *hba,
|
|
struct ufs_query_req **request, struct ufs_query_res **response,
|
|
enum query_opcode opcode, u8 idn, u8 index, u8 selector)
|
|
{
|
|
*request = &hba->dev_cmd.query.request;
|
|
*response = &hba->dev_cmd.query.response;
|
|
memset(*request, 0, sizeof(struct ufs_query_req));
|
|
memset(*response, 0, sizeof(struct ufs_query_res));
|
|
(*request)->upiu_req.opcode = opcode;
|
|
(*request)->upiu_req.idn = idn;
|
|
(*request)->upiu_req.index = index;
|
|
(*request)->upiu_req.selector = selector;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_query_flag() - API function for sending flag query requests
|
|
* hba: per-adapter instance
|
|
* query_opcode: flag query to perform
|
|
* idn: flag idn to access
|
|
* flag_res: the flag value after the query request completes
|
|
*
|
|
* Returns 0 for success, non-zero in case of failure
|
|
*/
|
|
static int ufshcd_query_flag(struct ufs_hba *hba, enum query_opcode opcode,
|
|
enum flag_idn idn, bool *flag_res)
|
|
{
|
|
struct ufs_query_req *request = NULL;
|
|
struct ufs_query_res *response = NULL;
|
|
int err, index = 0, selector = 0;
|
|
|
|
BUG_ON(!hba);
|
|
|
|
mutex_lock(&hba->dev_cmd.lock);
|
|
ufshcd_init_query(hba, &request, &response, opcode, idn, index,
|
|
selector);
|
|
|
|
switch (opcode) {
|
|
case UPIU_QUERY_OPCODE_SET_FLAG:
|
|
case UPIU_QUERY_OPCODE_CLEAR_FLAG:
|
|
case UPIU_QUERY_OPCODE_TOGGLE_FLAG:
|
|
request->query_func = UPIU_QUERY_FUNC_STANDARD_WRITE_REQUEST;
|
|
break;
|
|
case UPIU_QUERY_OPCODE_READ_FLAG:
|
|
request->query_func = UPIU_QUERY_FUNC_STANDARD_READ_REQUEST;
|
|
if (!flag_res) {
|
|
/* No dummy reads */
|
|
dev_err(hba->dev, "%s: Invalid argument for read request\n",
|
|
__func__);
|
|
err = -EINVAL;
|
|
goto out_unlock;
|
|
}
|
|
break;
|
|
default:
|
|
dev_err(hba->dev,
|
|
"%s: Expected query flag opcode but got = %d\n",
|
|
__func__, opcode);
|
|
err = -EINVAL;
|
|
goto out_unlock;
|
|
}
|
|
|
|
err = ufshcd_exec_dev_cmd(hba, DEV_CMD_TYPE_QUERY, QUERY_REQ_TIMEOUT);
|
|
|
|
if (err) {
|
|
dev_err(hba->dev,
|
|
"%s: Sending flag query for idn %d failed, err = %d\n",
|
|
__func__, idn, err);
|
|
goto out_unlock;
|
|
}
|
|
|
|
if (flag_res)
|
|
*flag_res = (be32_to_cpu(response->upiu_res.value) &
|
|
MASK_QUERY_UPIU_FLAG_LOC) & 0x1;
|
|
|
|
out_unlock:
|
|
mutex_unlock(&hba->dev_cmd.lock);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_query_attr - API function for sending attribute requests
|
|
* hba: per-adapter instance
|
|
* opcode: attribute opcode
|
|
* idn: attribute idn to access
|
|
* index: index field
|
|
* selector: selector field
|
|
* attr_val: the attribute value after the query request completes
|
|
*
|
|
* Returns 0 for success, non-zero in case of failure
|
|
*/
|
|
static int ufshcd_query_attr(struct ufs_hba *hba, enum query_opcode opcode,
|
|
enum attr_idn idn, u8 index, u8 selector, u32 *attr_val)
|
|
{
|
|
struct ufs_query_req *request = NULL;
|
|
struct ufs_query_res *response = NULL;
|
|
int err;
|
|
|
|
BUG_ON(!hba);
|
|
|
|
if (!attr_val) {
|
|
dev_err(hba->dev, "%s: attribute value required for opcode 0x%x\n",
|
|
__func__, opcode);
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
mutex_lock(&hba->dev_cmd.lock);
|
|
ufshcd_init_query(hba, &request, &response, opcode, idn, index,
|
|
selector);
|
|
|
|
switch (opcode) {
|
|
case UPIU_QUERY_OPCODE_WRITE_ATTR:
|
|
request->query_func = UPIU_QUERY_FUNC_STANDARD_WRITE_REQUEST;
|
|
request->upiu_req.value = cpu_to_be32(*attr_val);
|
|
break;
|
|
case UPIU_QUERY_OPCODE_READ_ATTR:
|
|
request->query_func = UPIU_QUERY_FUNC_STANDARD_READ_REQUEST;
|
|
break;
|
|
default:
|
|
dev_err(hba->dev, "%s: Expected query attr opcode but got = 0x%.2x\n",
|
|
__func__, opcode);
|
|
err = -EINVAL;
|
|
goto out_unlock;
|
|
}
|
|
|
|
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);
|
|
goto out_unlock;
|
|
}
|
|
|
|
*attr_val = be32_to_cpu(response->upiu_res.value);
|
|
|
|
out_unlock:
|
|
mutex_unlock(&hba->dev_cmd.lock);
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_query_descriptor - API function for sending descriptor requests
|
|
* hba: per-adapter instance
|
|
* opcode: attribute opcode
|
|
* idn: attribute idn to access
|
|
* index: index field
|
|
* selector: selector field
|
|
* desc_buf: the buffer that contains the descriptor
|
|
* buf_len: length parameter passed to the device
|
|
*
|
|
* Returns 0 for success, non-zero in case of failure.
|
|
* The buf_len parameter will contain, on return, the length parameter
|
|
* received on the response.
|
|
*/
|
|
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)
|
|
{
|
|
struct ufs_query_req *request = NULL;
|
|
struct ufs_query_res *response = NULL;
|
|
int err;
|
|
|
|
BUG_ON(!hba);
|
|
|
|
if (!desc_buf) {
|
|
dev_err(hba->dev, "%s: descriptor buffer required for opcode 0x%x\n",
|
|
__func__, opcode);
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (*buf_len <= QUERY_DESC_MIN_SIZE || *buf_len > QUERY_DESC_MAX_SIZE) {
|
|
dev_err(hba->dev, "%s: descriptor buffer size (%d) is out of range\n",
|
|
__func__, *buf_len);
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
mutex_lock(&hba->dev_cmd.lock);
|
|
ufshcd_init_query(hba, &request, &response, opcode, idn, index,
|
|
selector);
|
|
hba->dev_cmd.query.descriptor = desc_buf;
|
|
request->upiu_req.length = *buf_len;
|
|
|
|
switch (opcode) {
|
|
case UPIU_QUERY_OPCODE_WRITE_DESC:
|
|
request->query_func = UPIU_QUERY_FUNC_STANDARD_WRITE_REQUEST;
|
|
break;
|
|
case UPIU_QUERY_OPCODE_READ_DESC:
|
|
request->query_func = UPIU_QUERY_FUNC_STANDARD_READ_REQUEST;
|
|
break;
|
|
default:
|
|
dev_err(hba->dev,
|
|
"%s: Expected query descriptor opcode but got = 0x%.2x\n",
|
|
__func__, opcode);
|
|
err = -EINVAL;
|
|
goto out_unlock;
|
|
}
|
|
|
|
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);
|
|
goto out_unlock;
|
|
}
|
|
|
|
hba->dev_cmd.query.descriptor = NULL;
|
|
*buf_len = response->upiu_res.length;
|
|
|
|
out_unlock:
|
|
mutex_unlock(&hba->dev_cmd.lock);
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_memory_alloc - allocate memory for host memory space data structures
|
|
* @hba: per adapter instance
|
|
*
|
|
* 1. Allocate DMA memory for Command Descriptor array
|
|
* Each command descriptor consist of Command UPIU, Response UPIU and PRDT
|
|
* 2. Allocate DMA memory for UTP Transfer Request Descriptor List (UTRDL).
|
|
* 3. Allocate DMA memory for UTP Task Management Request Descriptor List
|
|
* (UTMRDL)
|
|
* 4. Allocate memory for local reference block(lrb).
|
|
*
|
|
* Returns 0 for success, non-zero in case of failure
|
|
*/
|
|
static int ufshcd_memory_alloc(struct ufs_hba *hba)
|
|
{
|
|
size_t utmrdl_size, utrdl_size, ucdl_size;
|
|
|
|
/* Allocate memory for UTP command descriptors */
|
|
ucdl_size = (sizeof(struct utp_transfer_cmd_desc) * hba->nutrs);
|
|
hba->ucdl_base_addr = dmam_alloc_coherent(hba->dev,
|
|
ucdl_size,
|
|
&hba->ucdl_dma_addr,
|
|
GFP_KERNEL);
|
|
|
|
/*
|
|
* UFSHCI requires UTP command descriptor to be 128 byte aligned.
|
|
* make sure hba->ucdl_dma_addr is aligned to PAGE_SIZE
|
|
* if hba->ucdl_dma_addr is aligned to PAGE_SIZE, then it will
|
|
* be aligned to 128 bytes as well
|
|
*/
|
|
if (!hba->ucdl_base_addr ||
|
|
WARN_ON(hba->ucdl_dma_addr & (PAGE_SIZE - 1))) {
|
|
dev_err(hba->dev,
|
|
"Command Descriptor Memory allocation failed\n");
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Allocate memory for UTP Transfer descriptors
|
|
* UFSHCI requires 1024 byte alignment of UTRD
|
|
*/
|
|
utrdl_size = (sizeof(struct utp_transfer_req_desc) * hba->nutrs);
|
|
hba->utrdl_base_addr = dmam_alloc_coherent(hba->dev,
|
|
utrdl_size,
|
|
&hba->utrdl_dma_addr,
|
|
GFP_KERNEL);
|
|
if (!hba->utrdl_base_addr ||
|
|
WARN_ON(hba->utrdl_dma_addr & (PAGE_SIZE - 1))) {
|
|
dev_err(hba->dev,
|
|
"Transfer Descriptor Memory allocation failed\n");
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Allocate memory for UTP Task Management descriptors
|
|
* UFSHCI requires 1024 byte alignment of UTMRD
|
|
*/
|
|
utmrdl_size = sizeof(struct utp_task_req_desc) * hba->nutmrs;
|
|
hba->utmrdl_base_addr = dmam_alloc_coherent(hba->dev,
|
|
utmrdl_size,
|
|
&hba->utmrdl_dma_addr,
|
|
GFP_KERNEL);
|
|
if (!hba->utmrdl_base_addr ||
|
|
WARN_ON(hba->utmrdl_dma_addr & (PAGE_SIZE - 1))) {
|
|
dev_err(hba->dev,
|
|
"Task Management Descriptor Memory allocation failed\n");
|
|
goto out;
|
|
}
|
|
|
|
/* Allocate memory for local reference block */
|
|
hba->lrb = devm_kzalloc(hba->dev,
|
|
hba->nutrs * sizeof(struct ufshcd_lrb),
|
|
GFP_KERNEL);
|
|
if (!hba->lrb) {
|
|
dev_err(hba->dev, "LRB Memory allocation failed\n");
|
|
goto out;
|
|
}
|
|
return 0;
|
|
out:
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_host_memory_configure - configure local reference block with
|
|
* memory offsets
|
|
* @hba: per adapter instance
|
|
*
|
|
* Configure Host memory space
|
|
* 1. Update Corresponding UTRD.UCDBA and UTRD.UCDBAU with UCD DMA
|
|
* address.
|
|
* 2. Update each UTRD with Response UPIU offset, Response UPIU length
|
|
* and PRDT offset.
|
|
* 3. Save the corresponding addresses of UTRD, UCD.CMD, UCD.RSP and UCD.PRDT
|
|
* into local reference block.
|
|
*/
|
|
static void ufshcd_host_memory_configure(struct ufs_hba *hba)
|
|
{
|
|
struct utp_transfer_cmd_desc *cmd_descp;
|
|
struct utp_transfer_req_desc *utrdlp;
|
|
dma_addr_t cmd_desc_dma_addr;
|
|
dma_addr_t cmd_desc_element_addr;
|
|
u16 response_offset;
|
|
u16 prdt_offset;
|
|
int cmd_desc_size;
|
|
int i;
|
|
|
|
utrdlp = hba->utrdl_base_addr;
|
|
cmd_descp = hba->ucdl_base_addr;
|
|
|
|
response_offset =
|
|
offsetof(struct utp_transfer_cmd_desc, response_upiu);
|
|
prdt_offset =
|
|
offsetof(struct utp_transfer_cmd_desc, prd_table);
|
|
|
|
cmd_desc_size = sizeof(struct utp_transfer_cmd_desc);
|
|
cmd_desc_dma_addr = hba->ucdl_dma_addr;
|
|
|
|
for (i = 0; i < hba->nutrs; i++) {
|
|
/* Configure UTRD with command descriptor base address */
|
|
cmd_desc_element_addr =
|
|
(cmd_desc_dma_addr + (cmd_desc_size * i));
|
|
utrdlp[i].command_desc_base_addr_lo =
|
|
cpu_to_le32(lower_32_bits(cmd_desc_element_addr));
|
|
utrdlp[i].command_desc_base_addr_hi =
|
|
cpu_to_le32(upper_32_bits(cmd_desc_element_addr));
|
|
|
|
/* Response upiu and prdt offset should be in double words */
|
|
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].ucd_req_ptr =
|
|
(struct utp_upiu_req *)(cmd_descp + i);
|
|
hba->lrb[i].ucd_rsp_ptr =
|
|
(struct utp_upiu_rsp *)cmd_descp[i].response_upiu;
|
|
hba->lrb[i].ucd_prdt_ptr =
|
|
(struct ufshcd_sg_entry *)cmd_descp[i].prd_table;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ufshcd_dme_link_startup - Notify Unipro to perform link startup
|
|
* @hba: per adapter instance
|
|
*
|
|
* UIC_CMD_DME_LINK_STARTUP command must be issued to Unipro layer,
|
|
* in order to initialize the Unipro link startup procedure.
|
|
* Once the Unipro links are up, the device connected to the controller
|
|
* is detected.
|
|
*
|
|
* Returns 0 on success, non-zero value on failure
|
|
*/
|
|
static int ufshcd_dme_link_startup(struct ufs_hba *hba)
|
|
{
|
|
struct uic_command uic_cmd = {0};
|
|
int ret;
|
|
|
|
uic_cmd.command = UIC_CMD_DME_LINK_STARTUP;
|
|
|
|
ret = ufshcd_send_uic_cmd(hba, &uic_cmd);
|
|
if (ret)
|
|
dev_err(hba->dev,
|
|
"dme-link-startup: error code %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_dme_set_attr - UIC command for DME_SET, DME_PEER_SET
|
|
* @hba: per adapter instance
|
|
* @attr_sel: uic command argument1
|
|
* @attr_set: attribute set type as uic command argument2
|
|
* @mib_val: setting value as uic command argument3
|
|
* @peer: indicate whether peer or local
|
|
*
|
|
* Returns 0 on success, non-zero value on failure
|
|
*/
|
|
int ufshcd_dme_set_attr(struct ufs_hba *hba, u32 attr_sel,
|
|
u8 attr_set, u32 mib_val, u8 peer)
|
|
{
|
|
struct uic_command uic_cmd = {0};
|
|
static const char *const action[] = {
|
|
"dme-set",
|
|
"dme-peer-set"
|
|
};
|
|
const char *set = action[!!peer];
|
|
int ret;
|
|
|
|
uic_cmd.command = peer ?
|
|
UIC_CMD_DME_PEER_SET : UIC_CMD_DME_SET;
|
|
uic_cmd.argument1 = attr_sel;
|
|
uic_cmd.argument2 = UIC_ARG_ATTR_TYPE(attr_set);
|
|
uic_cmd.argument3 = mib_val;
|
|
|
|
ret = ufshcd_send_uic_cmd(hba, &uic_cmd);
|
|
if (ret)
|
|
dev_err(hba->dev, "%s: attr-id 0x%x val 0x%x error code %d\n",
|
|
set, UIC_GET_ATTR_ID(attr_sel), mib_val, ret);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ufshcd_dme_set_attr);
|
|
|
|
/**
|
|
* ufshcd_dme_get_attr - UIC command for DME_GET, DME_PEER_GET
|
|
* @hba: per adapter instance
|
|
* @attr_sel: uic command argument1
|
|
* @mib_val: the value of the attribute as returned by the UIC command
|
|
* @peer: indicate whether peer or local
|
|
*
|
|
* Returns 0 on success, non-zero value on failure
|
|
*/
|
|
int ufshcd_dme_get_attr(struct ufs_hba *hba, u32 attr_sel,
|
|
u32 *mib_val, u8 peer)
|
|
{
|
|
struct uic_command uic_cmd = {0};
|
|
static const char *const action[] = {
|
|
"dme-get",
|
|
"dme-peer-get"
|
|
};
|
|
const char *get = action[!!peer];
|
|
int ret;
|
|
|
|
uic_cmd.command = peer ?
|
|
UIC_CMD_DME_PEER_GET : UIC_CMD_DME_GET;
|
|
uic_cmd.argument1 = attr_sel;
|
|
|
|
ret = ufshcd_send_uic_cmd(hba, &uic_cmd);
|
|
if (ret) {
|
|
dev_err(hba->dev, "%s: attr-id 0x%x error code %d\n",
|
|
get, UIC_GET_ATTR_ID(attr_sel), ret);
|
|
goto out;
|
|
}
|
|
|
|
if (mib_val)
|
|
*mib_val = uic_cmd.argument3;
|
|
out:
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ufshcd_dme_get_attr);
|
|
|
|
/**
|
|
* ufshcd_uic_change_pwr_mode - Perform the UIC power mode chage
|
|
* using DME_SET primitives.
|
|
* @hba: per adapter instance
|
|
* @mode: powr mode value
|
|
*
|
|
* Returns 0 on success, non-zero value on failure
|
|
*/
|
|
static int ufshcd_uic_change_pwr_mode(struct ufs_hba *hba, u8 mode)
|
|
{
|
|
struct uic_command uic_cmd = {0};
|
|
struct completion pwr_done;
|
|
unsigned long flags;
|
|
u8 status;
|
|
int ret;
|
|
|
|
uic_cmd.command = UIC_CMD_DME_SET;
|
|
uic_cmd.argument1 = UIC_ARG_MIB(PA_PWRMODE);
|
|
uic_cmd.argument3 = mode;
|
|
init_completion(&pwr_done);
|
|
|
|
mutex_lock(&hba->uic_cmd_mutex);
|
|
|
|
spin_lock_irqsave(hba->host->host_lock, flags);
|
|
hba->pwr_done = &pwr_done;
|
|
spin_unlock_irqrestore(hba->host->host_lock, flags);
|
|
ret = __ufshcd_send_uic_cmd(hba, &uic_cmd);
|
|
if (ret) {
|
|
dev_err(hba->dev,
|
|
"pwr mode change with mode 0x%x uic error %d\n",
|
|
mode, ret);
|
|
goto out;
|
|
}
|
|
|
|
if (!wait_for_completion_timeout(hba->pwr_done,
|
|
msecs_to_jiffies(UIC_CMD_TIMEOUT))) {
|
|
dev_err(hba->dev,
|
|
"pwr mode change with mode 0x%x completion timeout\n",
|
|
mode);
|
|
ret = -ETIMEDOUT;
|
|
goto out;
|
|
}
|
|
|
|
status = ufshcd_get_upmcrs(hba);
|
|
if (status != PWR_LOCAL) {
|
|
dev_err(hba->dev,
|
|
"pwr mode change failed, host umpcrs:0x%x\n",
|
|
status);
|
|
ret = (status != PWR_OK) ? status : -1;
|
|
}
|
|
out:
|
|
spin_lock_irqsave(hba->host->host_lock, flags);
|
|
hba->pwr_done = NULL;
|
|
spin_unlock_irqrestore(hba->host->host_lock, flags);
|
|
mutex_unlock(&hba->uic_cmd_mutex);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_config_max_pwr_mode - Set & Change power mode with
|
|
* maximum capability attribute information.
|
|
* @hba: per adapter instance
|
|
*
|
|
* Returns 0 on success, non-zero value on failure
|
|
*/
|
|
static int ufshcd_config_max_pwr_mode(struct ufs_hba *hba)
|
|
{
|
|
enum {RX = 0, TX = 1};
|
|
u32 lanes[] = {1, 1};
|
|
u32 gear[] = {1, 1};
|
|
u8 pwr[] = {FASTAUTO_MODE, FASTAUTO_MODE};
|
|
int ret;
|
|
|
|
/* Get the connected lane count */
|
|
ufshcd_dme_get(hba, UIC_ARG_MIB(PA_CONNECTEDRXDATALANES), &lanes[RX]);
|
|
ufshcd_dme_get(hba, UIC_ARG_MIB(PA_CONNECTEDTXDATALANES), &lanes[TX]);
|
|
|
|
/*
|
|
* First, get the maximum gears of HS speed.
|
|
* If a zero value, it means there is no HSGEAR capability.
|
|
* Then, get the maximum gears of PWM speed.
|
|
*/
|
|
ufshcd_dme_get(hba, UIC_ARG_MIB(PA_MAXRXHSGEAR), &gear[RX]);
|
|
if (!gear[RX]) {
|
|
ufshcd_dme_get(hba, UIC_ARG_MIB(PA_MAXRXPWMGEAR), &gear[RX]);
|
|
pwr[RX] = SLOWAUTO_MODE;
|
|
}
|
|
|
|
ufshcd_dme_peer_get(hba, UIC_ARG_MIB(PA_MAXRXHSGEAR), &gear[TX]);
|
|
if (!gear[TX]) {
|
|
ufshcd_dme_peer_get(hba, UIC_ARG_MIB(PA_MAXRXPWMGEAR),
|
|
&gear[TX]);
|
|
pwr[TX] = SLOWAUTO_MODE;
|
|
}
|
|
|
|
/*
|
|
* Configure attributes for power mode change with below.
|
|
* - PA_RXGEAR, PA_ACTIVERXDATALANES, PA_RXTERMINATION,
|
|
* - PA_TXGEAR, PA_ACTIVETXDATALANES, PA_TXTERMINATION,
|
|
* - PA_HSSERIES
|
|
*/
|
|
ufshcd_dme_set(hba, UIC_ARG_MIB(PA_RXGEAR), gear[RX]);
|
|
ufshcd_dme_set(hba, UIC_ARG_MIB(PA_ACTIVERXDATALANES), lanes[RX]);
|
|
if (pwr[RX] == FASTAUTO_MODE)
|
|
ufshcd_dme_set(hba, UIC_ARG_MIB(PA_RXTERMINATION), TRUE);
|
|
|
|
ufshcd_dme_set(hba, UIC_ARG_MIB(PA_TXGEAR), gear[TX]);
|
|
ufshcd_dme_set(hba, UIC_ARG_MIB(PA_ACTIVETXDATALANES), lanes[TX]);
|
|
if (pwr[TX] == FASTAUTO_MODE)
|
|
ufshcd_dme_set(hba, UIC_ARG_MIB(PA_TXTERMINATION), TRUE);
|
|
|
|
if (pwr[RX] == FASTAUTO_MODE || pwr[TX] == FASTAUTO_MODE)
|
|
ufshcd_dme_set(hba, UIC_ARG_MIB(PA_HSSERIES), PA_HS_MODE_B);
|
|
|
|
ret = ufshcd_uic_change_pwr_mode(hba, pwr[RX] << 4 | pwr[TX]);
|
|
if (ret)
|
|
dev_err(hba->dev,
|
|
"pwr_mode: power mode change failed %d\n", ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_complete_dev_init() - checks device readiness
|
|
* hba: per-adapter instance
|
|
*
|
|
* Set fDeviceInit flag and poll until device toggles it.
|
|
*/
|
|
static int ufshcd_complete_dev_init(struct ufs_hba *hba)
|
|
{
|
|
int i, retries, err = 0;
|
|
bool flag_res = 1;
|
|
|
|
for (retries = QUERY_REQ_RETRIES; retries > 0; retries--) {
|
|
/* Set the fDeviceInit flag */
|
|
err = ufshcd_query_flag(hba, UPIU_QUERY_OPCODE_SET_FLAG,
|
|
QUERY_FLAG_IDN_FDEVICEINIT, NULL);
|
|
if (!err || err == -ETIMEDOUT)
|
|
break;
|
|
dev_dbg(hba->dev, "%s: error %d retrying\n", __func__, err);
|
|
}
|
|
if (err) {
|
|
dev_err(hba->dev,
|
|
"%s setting fDeviceInit flag failed with error %d\n",
|
|
__func__, err);
|
|
goto out;
|
|
}
|
|
|
|
/* poll for max. 100 iterations for fDeviceInit flag to clear */
|
|
for (i = 0; i < 100 && !err && flag_res; i++) {
|
|
for (retries = QUERY_REQ_RETRIES; retries > 0; retries--) {
|
|
err = ufshcd_query_flag(hba,
|
|
UPIU_QUERY_OPCODE_READ_FLAG,
|
|
QUERY_FLAG_IDN_FDEVICEINIT, &flag_res);
|
|
if (!err || err == -ETIMEDOUT)
|
|
break;
|
|
dev_dbg(hba->dev, "%s: error %d retrying\n", __func__,
|
|
err);
|
|
}
|
|
}
|
|
if (err)
|
|
dev_err(hba->dev,
|
|
"%s reading fDeviceInit flag failed with error %d\n",
|
|
__func__, err);
|
|
else if (flag_res)
|
|
dev_err(hba->dev,
|
|
"%s fDeviceInit was not cleared by the device\n",
|
|
__func__);
|
|
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_make_hba_operational - Make UFS controller operational
|
|
* @hba: per adapter instance
|
|
*
|
|
* To bring UFS host controller to operational state,
|
|
* 1. Check if device is present
|
|
* 2. Enable required interrupts
|
|
* 3. Configure interrupt aggregation
|
|
* 4. Program UTRL and UTMRL base addres
|
|
* 5. Configure run-stop-registers
|
|
*
|
|
* Returns 0 on success, non-zero value on failure
|
|
*/
|
|
static int ufshcd_make_hba_operational(struct ufs_hba *hba)
|
|
{
|
|
int err = 0;
|
|
u32 reg;
|
|
|
|
/* check if device present */
|
|
reg = ufshcd_readl(hba, REG_CONTROLLER_STATUS);
|
|
if (!ufshcd_is_device_present(reg)) {
|
|
dev_err(hba->dev, "cc: Device not present\n");
|
|
err = -ENXIO;
|
|
goto out;
|
|
}
|
|
|
|
/* Enable required interrupts */
|
|
ufshcd_enable_intr(hba, UFSHCD_ENABLE_INTRS);
|
|
|
|
/* Configure interrupt aggregation */
|
|
ufshcd_config_intr_aggr(hba, hba->nutrs - 1, INT_AGGR_DEF_TO);
|
|
|
|
/* Configure UTRL and UTMRL base address registers */
|
|
ufshcd_writel(hba, lower_32_bits(hba->utrdl_dma_addr),
|
|
REG_UTP_TRANSFER_REQ_LIST_BASE_L);
|
|
ufshcd_writel(hba, upper_32_bits(hba->utrdl_dma_addr),
|
|
REG_UTP_TRANSFER_REQ_LIST_BASE_H);
|
|
ufshcd_writel(hba, lower_32_bits(hba->utmrdl_dma_addr),
|
|
REG_UTP_TASK_REQ_LIST_BASE_L);
|
|
ufshcd_writel(hba, upper_32_bits(hba->utmrdl_dma_addr),
|
|
REG_UTP_TASK_REQ_LIST_BASE_H);
|
|
|
|
/*
|
|
* UCRDY, UTMRLDY and UTRLRDY bits must be 1
|
|
* DEI, HEI bits must be 0
|
|
*/
|
|
if (!(ufshcd_get_lists_status(reg))) {
|
|
ufshcd_enable_run_stop_reg(hba);
|
|
} else {
|
|
dev_err(hba->dev,
|
|
"Host controller not ready to process requests");
|
|
err = -EIO;
|
|
goto out;
|
|
}
|
|
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_hba_enable - initialize the controller
|
|
* @hba: per adapter instance
|
|
*
|
|
* The controller resets itself and controller firmware initialization
|
|
* sequence kicks off. When controller is ready it will set
|
|
* the Host Controller Enable bit to 1.
|
|
*
|
|
* Returns 0 on success, non-zero value on failure
|
|
*/
|
|
static int ufshcd_hba_enable(struct ufs_hba *hba)
|
|
{
|
|
int retry;
|
|
|
|
/*
|
|
* msleep of 1 and 5 used in this function might result in msleep(20),
|
|
* but it was necessary to send the UFS FPGA to reset mode during
|
|
* development and testing of this driver. msleep can be changed to
|
|
* mdelay and retry count can be reduced based on the controller.
|
|
*/
|
|
if (!ufshcd_is_hba_active(hba)) {
|
|
|
|
/* change controller state to "reset state" */
|
|
ufshcd_hba_stop(hba);
|
|
|
|
/*
|
|
* This delay is based on the testing done with UFS host
|
|
* controller FPGA. The delay can be changed based on the
|
|
* host controller used.
|
|
*/
|
|
msleep(5);
|
|
}
|
|
|
|
/* start controller initialization sequence */
|
|
ufshcd_hba_start(hba);
|
|
|
|
/*
|
|
* To initialize a UFS host controller HCE bit must be set to 1.
|
|
* During initialization the HCE bit value changes from 1->0->1.
|
|
* When the host controller completes initialization sequence
|
|
* it sets the value of HCE bit to 1. The same HCE bit is read back
|
|
* to check if the controller has completed initialization sequence.
|
|
* So without this delay the value HCE = 1, set in the previous
|
|
* instruction might be read back.
|
|
* This delay can be changed based on the controller.
|
|
*/
|
|
msleep(1);
|
|
|
|
/* wait for the host controller to complete initialization */
|
|
retry = 10;
|
|
while (ufshcd_is_hba_active(hba)) {
|
|
if (retry) {
|
|
retry--;
|
|
} else {
|
|
dev_err(hba->dev,
|
|
"Controller enable failed\n");
|
|
return -EIO;
|
|
}
|
|
msleep(5);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_link_startup - Initialize unipro link startup
|
|
* @hba: per adapter instance
|
|
*
|
|
* Returns 0 for success, non-zero in case of failure
|
|
*/
|
|
static int ufshcd_link_startup(struct ufs_hba *hba)
|
|
{
|
|
int ret;
|
|
|
|
/* enable UIC related interrupts */
|
|
ufshcd_enable_intr(hba, UIC_COMMAND_COMPL);
|
|
|
|
ret = ufshcd_dme_link_startup(hba);
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = ufshcd_make_hba_operational(hba);
|
|
|
|
out:
|
|
if (ret)
|
|
dev_err(hba->dev, "link startup failed %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_verify_dev_init() - Verify device initialization
|
|
* @hba: per-adapter instance
|
|
*
|
|
* Send NOP OUT UPIU and wait for NOP IN response to check whether the
|
|
* device Transport Protocol (UTP) layer is ready after a reset.
|
|
* If the UTP layer at the device side is not initialized, it may
|
|
* not respond with NOP IN UPIU within timeout of %NOP_OUT_TIMEOUT
|
|
* and we retry sending NOP OUT for %NOP_OUT_RETRIES iterations.
|
|
*/
|
|
static int ufshcd_verify_dev_init(struct ufs_hba *hba)
|
|
{
|
|
int err = 0;
|
|
int retries;
|
|
|
|
mutex_lock(&hba->dev_cmd.lock);
|
|
for (retries = NOP_OUT_RETRIES; retries > 0; retries--) {
|
|
err = ufshcd_exec_dev_cmd(hba, DEV_CMD_TYPE_NOP,
|
|
NOP_OUT_TIMEOUT);
|
|
|
|
if (!err || err == -ETIMEDOUT)
|
|
break;
|
|
|
|
dev_dbg(hba->dev, "%s: error %d retrying\n", __func__, err);
|
|
}
|
|
mutex_unlock(&hba->dev_cmd.lock);
|
|
|
|
if (err)
|
|
dev_err(hba->dev, "%s: NOP OUT failed %d\n", __func__, err);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_slave_alloc - handle initial SCSI device configurations
|
|
* @sdev: pointer to SCSI device
|
|
*
|
|
* Returns success
|
|
*/
|
|
static int ufshcd_slave_alloc(struct scsi_device *sdev)
|
|
{
|
|
struct ufs_hba *hba;
|
|
int lun_qdepth;
|
|
|
|
hba = shost_priv(sdev->host);
|
|
sdev->tagged_supported = 1;
|
|
|
|
/* Mode sense(6) is not supported by UFS, so use Mode sense(10) */
|
|
sdev->use_10_for_ms = 1;
|
|
scsi_set_tag_type(sdev, MSG_SIMPLE_TAG);
|
|
|
|
/* allow SCSI layer to restart the device in case of errors */
|
|
sdev->allow_restart = 1;
|
|
|
|
lun_qdepth = ufshcd_read_sdev_qdepth(hba, sdev);
|
|
if (lun_qdepth <= 0)
|
|
/* eventually, we can figure out the real queue depth */
|
|
lun_qdepth = hba->nutrs;
|
|
else
|
|
lun_qdepth = min_t(int, lun_qdepth, hba->nutrs);
|
|
|
|
dev_dbg(hba->dev, "%s: activate tcq with queue depth %d\n",
|
|
__func__, lun_qdepth);
|
|
scsi_activate_tcq(sdev, lun_qdepth);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_change_queue_depth - change queue depth
|
|
* @sdev: pointer to SCSI device
|
|
* @depth: required depth to set
|
|
* @reason: reason for changing the depth
|
|
*
|
|
* Change queue depth according to the reason and make sure
|
|
* the max. limits are not crossed.
|
|
*/
|
|
int ufshcd_change_queue_depth(struct scsi_device *sdev, int depth, int reason)
|
|
{
|
|
struct ufs_hba *hba = shost_priv(sdev->host);
|
|
|
|
if (depth > hba->nutrs)
|
|
depth = hba->nutrs;
|
|
|
|
switch (reason) {
|
|
case SCSI_QDEPTH_DEFAULT:
|
|
case SCSI_QDEPTH_RAMP_UP:
|
|
if (!sdev->tagged_supported)
|
|
depth = 1;
|
|
scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth);
|
|
break;
|
|
case SCSI_QDEPTH_QFULL:
|
|
scsi_track_queue_full(sdev, depth);
|
|
break;
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
return depth;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_slave_destroy - remove SCSI device configurations
|
|
* @sdev: pointer to SCSI device
|
|
*/
|
|
static void ufshcd_slave_destroy(struct scsi_device *sdev)
|
|
{
|
|
struct ufs_hba *hba;
|
|
|
|
hba = shost_priv(sdev->host);
|
|
scsi_deactivate_tcq(sdev, hba->nutrs);
|
|
}
|
|
|
|
/**
|
|
* ufshcd_task_req_compl - handle task management request completion
|
|
* @hba: per adapter instance
|
|
* @index: index of the completed request
|
|
* @resp: task management service response
|
|
*
|
|
* Returns non-zero value on error, zero on success
|
|
*/
|
|
static int ufshcd_task_req_compl(struct ufs_hba *hba, u32 index, u8 *resp)
|
|
{
|
|
struct utp_task_req_desc *task_req_descp;
|
|
struct utp_upiu_task_rsp *task_rsp_upiup;
|
|
unsigned long flags;
|
|
int ocs_value;
|
|
int task_result;
|
|
|
|
spin_lock_irqsave(hba->host->host_lock, flags);
|
|
|
|
/* Clear completed tasks from outstanding_tasks */
|
|
__clear_bit(index, &hba->outstanding_tasks);
|
|
|
|
task_req_descp = hba->utmrdl_base_addr;
|
|
ocs_value = ufshcd_get_tmr_ocs(&task_req_descp[index]);
|
|
|
|
if (ocs_value == OCS_SUCCESS) {
|
|
task_rsp_upiup = (struct utp_upiu_task_rsp *)
|
|
task_req_descp[index].task_rsp_upiu;
|
|
task_result = be32_to_cpu(task_rsp_upiup->header.dword_1);
|
|
task_result = ((task_result & MASK_TASK_RESPONSE) >> 8);
|
|
if (resp)
|
|
*resp = (u8)task_result;
|
|
} else {
|
|
dev_err(hba->dev, "%s: failed, ocs = 0x%x\n",
|
|
__func__, ocs_value);
|
|
}
|
|
spin_unlock_irqrestore(hba->host->host_lock, flags);
|
|
|
|
return ocs_value;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_scsi_cmd_status - Update SCSI command result based on SCSI status
|
|
* @lrb: pointer to local reference block of completed command
|
|
* @scsi_status: SCSI command status
|
|
*
|
|
* Returns value base on SCSI command status
|
|
*/
|
|
static inline int
|
|
ufshcd_scsi_cmd_status(struct ufshcd_lrb *lrbp, int scsi_status)
|
|
{
|
|
int result = 0;
|
|
|
|
switch (scsi_status) {
|
|
case SAM_STAT_CHECK_CONDITION:
|
|
ufshcd_copy_sense_data(lrbp);
|
|
case SAM_STAT_GOOD:
|
|
result |= DID_OK << 16 |
|
|
COMMAND_COMPLETE << 8 |
|
|
scsi_status;
|
|
break;
|
|
case SAM_STAT_TASK_SET_FULL:
|
|
case SAM_STAT_BUSY:
|
|
case SAM_STAT_TASK_ABORTED:
|
|
ufshcd_copy_sense_data(lrbp);
|
|
result |= scsi_status;
|
|
break;
|
|
default:
|
|
result |= DID_ERROR << 16;
|
|
break;
|
|
} /* end of switch */
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_transfer_rsp_status - Get overall status of the response
|
|
* @hba: per adapter instance
|
|
* @lrb: pointer to local reference block of completed command
|
|
*
|
|
* Returns result of the command to notify SCSI midlayer
|
|
*/
|
|
static inline int
|
|
ufshcd_transfer_rsp_status(struct ufs_hba *hba, struct ufshcd_lrb *lrbp)
|
|
{
|
|
int result = 0;
|
|
int scsi_status;
|
|
int ocs;
|
|
|
|
/* overall command status of utrd */
|
|
ocs = ufshcd_get_tr_ocs(lrbp);
|
|
|
|
switch (ocs) {
|
|
case OCS_SUCCESS:
|
|
result = ufshcd_get_req_rsp(lrbp->ucd_rsp_ptr);
|
|
|
|
switch (result) {
|
|
case UPIU_TRANSACTION_RESPONSE:
|
|
/*
|
|
* get the response UPIU result to extract
|
|
* the SCSI command status
|
|
*/
|
|
result = ufshcd_get_rsp_upiu_result(lrbp->ucd_rsp_ptr);
|
|
|
|
/*
|
|
* get the result based on SCSI status response
|
|
* to notify the SCSI midlayer of the command status
|
|
*/
|
|
scsi_status = result & MASK_SCSI_STATUS;
|
|
result = ufshcd_scsi_cmd_status(lrbp, scsi_status);
|
|
|
|
if (ufshcd_is_exception_event(lrbp->ucd_rsp_ptr))
|
|
schedule_work(&hba->eeh_work);
|
|
break;
|
|
case UPIU_TRANSACTION_REJECT_UPIU:
|
|
/* TODO: handle Reject UPIU Response */
|
|
result = DID_ERROR << 16;
|
|
dev_err(hba->dev,
|
|
"Reject UPIU not fully implemented\n");
|
|
break;
|
|
default:
|
|
result = DID_ERROR << 16;
|
|
dev_err(hba->dev,
|
|
"Unexpected request response code = %x\n",
|
|
result);
|
|
break;
|
|
}
|
|
break;
|
|
case OCS_ABORTED:
|
|
result |= DID_ABORT << 16;
|
|
break;
|
|
case OCS_INVALID_COMMAND_STATUS:
|
|
result |= DID_REQUEUE << 16;
|
|
break;
|
|
case OCS_INVALID_CMD_TABLE_ATTR:
|
|
case OCS_INVALID_PRDT_ATTR:
|
|
case OCS_MISMATCH_DATA_BUF_SIZE:
|
|
case OCS_MISMATCH_RESP_UPIU_SIZE:
|
|
case OCS_PEER_COMM_FAILURE:
|
|
case OCS_FATAL_ERROR:
|
|
default:
|
|
result |= DID_ERROR << 16;
|
|
dev_err(hba->dev,
|
|
"OCS error from controller = %x\n", ocs);
|
|
break;
|
|
} /* end of switch */
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_uic_cmd_compl - handle completion of uic command
|
|
* @hba: per adapter instance
|
|
* @intr_status: interrupt status generated by the controller
|
|
*/
|
|
static void ufshcd_uic_cmd_compl(struct ufs_hba *hba, u32 intr_status)
|
|
{
|
|
if ((intr_status & UIC_COMMAND_COMPL) && hba->active_uic_cmd) {
|
|
hba->active_uic_cmd->argument2 |=
|
|
ufshcd_get_uic_cmd_result(hba);
|
|
hba->active_uic_cmd->argument3 =
|
|
ufshcd_get_dme_attr_val(hba);
|
|
complete(&hba->active_uic_cmd->done);
|
|
}
|
|
|
|
if ((intr_status & UIC_POWER_MODE) && hba->pwr_done)
|
|
complete(hba->pwr_done);
|
|
}
|
|
|
|
/**
|
|
* ufshcd_transfer_req_compl - handle SCSI and query command completion
|
|
* @hba: per adapter instance
|
|
*/
|
|
static void ufshcd_transfer_req_compl(struct ufs_hba *hba)
|
|
{
|
|
struct ufshcd_lrb *lrbp;
|
|
struct scsi_cmnd *cmd;
|
|
unsigned long completed_reqs;
|
|
u32 tr_doorbell;
|
|
int result;
|
|
int index;
|
|
bool int_aggr_reset = false;
|
|
|
|
tr_doorbell = ufshcd_readl(hba, REG_UTP_TRANSFER_REQ_DOOR_BELL);
|
|
completed_reqs = tr_doorbell ^ hba->outstanding_reqs;
|
|
|
|
for (index = 0; index < hba->nutrs; index++) {
|
|
if (test_bit(index, &completed_reqs)) {
|
|
lrbp = &hba->lrb[index];
|
|
cmd = lrbp->cmd;
|
|
/*
|
|
* Don't skip resetting interrupt aggregation counters
|
|
* if a regular command is present.
|
|
*/
|
|
int_aggr_reset |= !lrbp->intr_cmd;
|
|
|
|
if (cmd) {
|
|
result = ufshcd_transfer_rsp_status(hba, lrbp);
|
|
scsi_dma_unmap(cmd);
|
|
cmd->result = result;
|
|
/* Mark completed command as NULL in LRB */
|
|
lrbp->cmd = NULL;
|
|
clear_bit_unlock(index, &hba->lrb_in_use);
|
|
/* Do not touch lrbp after scsi done */
|
|
cmd->scsi_done(cmd);
|
|
} else if (lrbp->command_type ==
|
|
UTP_CMD_TYPE_DEV_MANAGE) {
|
|
if (hba->dev_cmd.complete)
|
|
complete(hba->dev_cmd.complete);
|
|
}
|
|
} /* end of if */
|
|
} /* end of for */
|
|
|
|
/* clear corresponding bits of completed commands */
|
|
hba->outstanding_reqs ^= completed_reqs;
|
|
|
|
/* we might have free'd some tags above */
|
|
wake_up(&hba->dev_cmd.tag_wq);
|
|
|
|
/* Reset interrupt aggregation counters */
|
|
if (int_aggr_reset)
|
|
ufshcd_reset_intr_aggr(hba);
|
|
}
|
|
|
|
/**
|
|
* ufshcd_disable_ee - disable exception event
|
|
* @hba: per-adapter instance
|
|
* @mask: exception event to disable
|
|
*
|
|
* Disables exception event in the device so that the EVENT_ALERT
|
|
* bit is not set.
|
|
*
|
|
* Returns zero on success, non-zero error value on failure.
|
|
*/
|
|
static int ufshcd_disable_ee(struct ufs_hba *hba, u16 mask)
|
|
{
|
|
int err = 0;
|
|
u32 val;
|
|
|
|
if (!(hba->ee_ctrl_mask & mask))
|
|
goto out;
|
|
|
|
val = hba->ee_ctrl_mask & ~mask;
|
|
val &= 0xFFFF; /* 2 bytes */
|
|
err = ufshcd_query_attr(hba, UPIU_QUERY_OPCODE_WRITE_ATTR,
|
|
QUERY_ATTR_IDN_EE_CONTROL, 0, 0, &val);
|
|
if (!err)
|
|
hba->ee_ctrl_mask &= ~mask;
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_enable_ee - enable exception event
|
|
* @hba: per-adapter instance
|
|
* @mask: exception event to enable
|
|
*
|
|
* Enable corresponding exception event in the device to allow
|
|
* device to alert host in critical scenarios.
|
|
*
|
|
* Returns zero on success, non-zero error value on failure.
|
|
*/
|
|
static int ufshcd_enable_ee(struct ufs_hba *hba, u16 mask)
|
|
{
|
|
int err = 0;
|
|
u32 val;
|
|
|
|
if (hba->ee_ctrl_mask & mask)
|
|
goto out;
|
|
|
|
val = hba->ee_ctrl_mask | mask;
|
|
val &= 0xFFFF; /* 2 bytes */
|
|
err = ufshcd_query_attr(hba, UPIU_QUERY_OPCODE_WRITE_ATTR,
|
|
QUERY_ATTR_IDN_EE_CONTROL, 0, 0, &val);
|
|
if (!err)
|
|
hba->ee_ctrl_mask |= mask;
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_enable_auto_bkops - Allow device managed BKOPS
|
|
* @hba: per-adapter instance
|
|
*
|
|
* Allow device to manage background operations on its own. Enabling
|
|
* this might lead to inconsistent latencies during normal data transfers
|
|
* as the device is allowed to manage its own way of handling background
|
|
* operations.
|
|
*
|
|
* Returns zero on success, non-zero on failure.
|
|
*/
|
|
static int ufshcd_enable_auto_bkops(struct ufs_hba *hba)
|
|
{
|
|
int err = 0;
|
|
|
|
if (hba->auto_bkops_enabled)
|
|
goto out;
|
|
|
|
err = ufshcd_query_flag(hba, UPIU_QUERY_OPCODE_SET_FLAG,
|
|
QUERY_FLAG_IDN_BKOPS_EN, NULL);
|
|
if (err) {
|
|
dev_err(hba->dev, "%s: failed to enable bkops %d\n",
|
|
__func__, err);
|
|
goto out;
|
|
}
|
|
|
|
hba->auto_bkops_enabled = true;
|
|
|
|
/* No need of URGENT_BKOPS exception from the device */
|
|
err = ufshcd_disable_ee(hba, MASK_EE_URGENT_BKOPS);
|
|
if (err)
|
|
dev_err(hba->dev, "%s: failed to disable exception event %d\n",
|
|
__func__, err);
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_disable_auto_bkops - block device in doing background operations
|
|
* @hba: per-adapter instance
|
|
*
|
|
* Disabling background operations improves command response latency but
|
|
* has drawback of device moving into critical state where the device is
|
|
* not-operable. Make sure to call ufshcd_enable_auto_bkops() whenever the
|
|
* host is idle so that BKOPS are managed effectively without any negative
|
|
* impacts.
|
|
*
|
|
* Returns zero on success, non-zero on failure.
|
|
*/
|
|
static int ufshcd_disable_auto_bkops(struct ufs_hba *hba)
|
|
{
|
|
int err = 0;
|
|
|
|
if (!hba->auto_bkops_enabled)
|
|
goto out;
|
|
|
|
/*
|
|
* If host assisted BKOPs is to be enabled, make sure
|
|
* urgent bkops exception is allowed.
|
|
*/
|
|
err = ufshcd_enable_ee(hba, MASK_EE_URGENT_BKOPS);
|
|
if (err) {
|
|
dev_err(hba->dev, "%s: failed to enable exception event %d\n",
|
|
__func__, err);
|
|
goto out;
|
|
}
|
|
|
|
err = ufshcd_query_flag(hba, UPIU_QUERY_OPCODE_CLEAR_FLAG,
|
|
QUERY_FLAG_IDN_BKOPS_EN, NULL);
|
|
if (err) {
|
|
dev_err(hba->dev, "%s: failed to disable bkops %d\n",
|
|
__func__, err);
|
|
ufshcd_disable_ee(hba, MASK_EE_URGENT_BKOPS);
|
|
goto out;
|
|
}
|
|
|
|
hba->auto_bkops_enabled = false;
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_force_reset_auto_bkops - force enable of auto bkops
|
|
* @hba: per adapter instance
|
|
*
|
|
* After a device reset the device may toggle the BKOPS_EN flag
|
|
* to default value. The s/w tracking variables should be updated
|
|
* as well. Do this by forcing enable of auto bkops.
|
|
*/
|
|
static void ufshcd_force_reset_auto_bkops(struct ufs_hba *hba)
|
|
{
|
|
hba->auto_bkops_enabled = false;
|
|
hba->ee_ctrl_mask |= MASK_EE_URGENT_BKOPS;
|
|
ufshcd_enable_auto_bkops(hba);
|
|
}
|
|
|
|
static inline int ufshcd_get_bkops_status(struct ufs_hba *hba, u32 *status)
|
|
{
|
|
return ufshcd_query_attr(hba, UPIU_QUERY_OPCODE_READ_ATTR,
|
|
QUERY_ATTR_IDN_BKOPS_STATUS, 0, 0, status);
|
|
}
|
|
|
|
/**
|
|
* ufshcd_urgent_bkops - handle urgent bkops exception event
|
|
* @hba: per-adapter instance
|
|
*
|
|
* Enable fBackgroundOpsEn flag in the device to permit background
|
|
* operations.
|
|
*/
|
|
static int ufshcd_urgent_bkops(struct ufs_hba *hba)
|
|
{
|
|
int err;
|
|
u32 status = 0;
|
|
|
|
err = ufshcd_get_bkops_status(hba, &status);
|
|
if (err) {
|
|
dev_err(hba->dev, "%s: failed to get BKOPS status %d\n",
|
|
__func__, err);
|
|
goto out;
|
|
}
|
|
|
|
status = status & 0xF;
|
|
|
|
/* handle only if status indicates performance impact or critical */
|
|
if (status >= BKOPS_STATUS_PERF_IMPACT)
|
|
err = ufshcd_enable_auto_bkops(hba);
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
static inline int ufshcd_get_ee_status(struct ufs_hba *hba, u32 *status)
|
|
{
|
|
return ufshcd_query_attr(hba, UPIU_QUERY_OPCODE_READ_ATTR,
|
|
QUERY_ATTR_IDN_EE_STATUS, 0, 0, status);
|
|
}
|
|
|
|
/**
|
|
* ufshcd_exception_event_handler - handle exceptions raised by device
|
|
* @work: pointer to work data
|
|
*
|
|
* Read bExceptionEventStatus attribute from the device and handle the
|
|
* exception event accordingly.
|
|
*/
|
|
static void ufshcd_exception_event_handler(struct work_struct *work)
|
|
{
|
|
struct ufs_hba *hba;
|
|
int err;
|
|
u32 status = 0;
|
|
hba = container_of(work, struct ufs_hba, eeh_work);
|
|
|
|
pm_runtime_get_sync(hba->dev);
|
|
err = ufshcd_get_ee_status(hba, &status);
|
|
if (err) {
|
|
dev_err(hba->dev, "%s: failed to get exception status %d\n",
|
|
__func__, err);
|
|
goto out;
|
|
}
|
|
|
|
status &= hba->ee_ctrl_mask;
|
|
if (status & MASK_EE_URGENT_BKOPS) {
|
|
err = ufshcd_urgent_bkops(hba);
|
|
if (err)
|
|
dev_err(hba->dev, "%s: failed to handle urgent bkops %d\n",
|
|
__func__, err);
|
|
}
|
|
out:
|
|
pm_runtime_put_sync(hba->dev);
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_err_handler - handle UFS errors that require s/w attention
|
|
* @work: pointer to work structure
|
|
*/
|
|
static void ufshcd_err_handler(struct work_struct *work)
|
|
{
|
|
struct ufs_hba *hba;
|
|
unsigned long flags;
|
|
u32 err_xfer = 0;
|
|
u32 err_tm = 0;
|
|
int err = 0;
|
|
int tag;
|
|
|
|
hba = container_of(work, struct ufs_hba, eh_work);
|
|
|
|
pm_runtime_get_sync(hba->dev);
|
|
|
|
spin_lock_irqsave(hba->host->host_lock, flags);
|
|
if (hba->ufshcd_state == UFSHCD_STATE_RESET) {
|
|
spin_unlock_irqrestore(hba->host->host_lock, flags);
|
|
goto out;
|
|
}
|
|
|
|
hba->ufshcd_state = UFSHCD_STATE_RESET;
|
|
ufshcd_set_eh_in_progress(hba);
|
|
|
|
/* Complete requests that have door-bell cleared by h/w */
|
|
ufshcd_transfer_req_compl(hba);
|
|
ufshcd_tmc_handler(hba);
|
|
spin_unlock_irqrestore(hba->host->host_lock, flags);
|
|
|
|
/* Clear pending transfer requests */
|
|
for_each_set_bit(tag, &hba->outstanding_reqs, hba->nutrs)
|
|
if (ufshcd_clear_cmd(hba, tag))
|
|
err_xfer |= 1 << tag;
|
|
|
|
/* Clear pending task management requests */
|
|
for_each_set_bit(tag, &hba->outstanding_tasks, hba->nutmrs)
|
|
if (ufshcd_clear_tm_cmd(hba, tag))
|
|
err_tm |= 1 << tag;
|
|
|
|
/* Complete the requests that are cleared by s/w */
|
|
spin_lock_irqsave(hba->host->host_lock, flags);
|
|
ufshcd_transfer_req_compl(hba);
|
|
ufshcd_tmc_handler(hba);
|
|
spin_unlock_irqrestore(hba->host->host_lock, flags);
|
|
|
|
/* Fatal errors need reset */
|
|
if (err_xfer || err_tm || (hba->saved_err & INT_FATAL_ERRORS) ||
|
|
((hba->saved_err & UIC_ERROR) &&
|
|
(hba->saved_uic_err & UFSHCD_UIC_DL_PA_INIT_ERROR))) {
|
|
err = ufshcd_reset_and_restore(hba);
|
|
if (err) {
|
|
dev_err(hba->dev, "%s: reset and restore failed\n",
|
|
__func__);
|
|
hba->ufshcd_state = UFSHCD_STATE_ERROR;
|
|
}
|
|
/*
|
|
* Inform scsi mid-layer that we did reset and allow to handle
|
|
* Unit Attention properly.
|
|
*/
|
|
scsi_report_bus_reset(hba->host, 0);
|
|
hba->saved_err = 0;
|
|
hba->saved_uic_err = 0;
|
|
}
|
|
ufshcd_clear_eh_in_progress(hba);
|
|
|
|
out:
|
|
scsi_unblock_requests(hba->host);
|
|
pm_runtime_put_sync(hba->dev);
|
|
}
|
|
|
|
/**
|
|
* ufshcd_update_uic_error - check and set fatal UIC error flags.
|
|
* @hba: per-adapter instance
|
|
*/
|
|
static void ufshcd_update_uic_error(struct ufs_hba *hba)
|
|
{
|
|
u32 reg;
|
|
|
|
/* PA_INIT_ERROR is fatal and needs UIC reset */
|
|
reg = ufshcd_readl(hba, REG_UIC_ERROR_CODE_DATA_LINK_LAYER);
|
|
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)
|
|
hba->uic_error |= UFSHCD_UIC_NL_ERROR;
|
|
|
|
reg = ufshcd_readl(hba, REG_UIC_ERROR_CODE_TRANSPORT_LAYER);
|
|
if (reg)
|
|
hba->uic_error |= UFSHCD_UIC_TL_ERROR;
|
|
|
|
reg = ufshcd_readl(hba, REG_UIC_ERROR_CODE_DME);
|
|
if (reg)
|
|
hba->uic_error |= UFSHCD_UIC_DME_ERROR;
|
|
|
|
dev_dbg(hba->dev, "%s: UIC error flags = 0x%08x\n",
|
|
__func__, hba->uic_error);
|
|
}
|
|
|
|
/**
|
|
* ufshcd_check_errors - Check for errors that need s/w attention
|
|
* @hba: per-adapter instance
|
|
*/
|
|
static void ufshcd_check_errors(struct ufs_hba *hba)
|
|
{
|
|
bool queue_eh_work = false;
|
|
|
|
if (hba->errors & INT_FATAL_ERRORS)
|
|
queue_eh_work = true;
|
|
|
|
if (hba->errors & UIC_ERROR) {
|
|
hba->uic_error = 0;
|
|
ufshcd_update_uic_error(hba);
|
|
if (hba->uic_error)
|
|
queue_eh_work = true;
|
|
}
|
|
|
|
if (queue_eh_work) {
|
|
/* 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);
|
|
}
|
|
}
|
|
/*
|
|
* if (!queue_eh_work) -
|
|
* Other errors are either non-fatal where host recovers
|
|
* itself without s/w intervention or errors that will be
|
|
* handled by the SCSI core layer.
|
|
*/
|
|
}
|
|
|
|
/**
|
|
* ufshcd_tmc_handler - handle task management function completion
|
|
* @hba: per adapter instance
|
|
*/
|
|
static void ufshcd_tmc_handler(struct ufs_hba *hba)
|
|
{
|
|
u32 tm_doorbell;
|
|
|
|
tm_doorbell = ufshcd_readl(hba, REG_UTP_TASK_REQ_DOOR_BELL);
|
|
hba->tm_condition = tm_doorbell ^ hba->outstanding_tasks;
|
|
wake_up(&hba->tm_wq);
|
|
}
|
|
|
|
/**
|
|
* ufshcd_sl_intr - Interrupt service routine
|
|
* @hba: per adapter instance
|
|
* @intr_status: contains interrupts generated by the controller
|
|
*/
|
|
static void ufshcd_sl_intr(struct ufs_hba *hba, u32 intr_status)
|
|
{
|
|
hba->errors = UFSHCD_ERROR_MASK & intr_status;
|
|
if (hba->errors)
|
|
ufshcd_check_errors(hba);
|
|
|
|
if (intr_status & UFSHCD_UIC_MASK)
|
|
ufshcd_uic_cmd_compl(hba, intr_status);
|
|
|
|
if (intr_status & UTP_TASK_REQ_COMPL)
|
|
ufshcd_tmc_handler(hba);
|
|
|
|
if (intr_status & UTP_TRANSFER_REQ_COMPL)
|
|
ufshcd_transfer_req_compl(hba);
|
|
}
|
|
|
|
/**
|
|
* ufshcd_intr - Main interrupt service routine
|
|
* @irq: irq number
|
|
* @__hba: pointer to adapter instance
|
|
*
|
|
* Returns IRQ_HANDLED - If interrupt is valid
|
|
* IRQ_NONE - If invalid interrupt
|
|
*/
|
|
static irqreturn_t ufshcd_intr(int irq, void *__hba)
|
|
{
|
|
u32 intr_status;
|
|
irqreturn_t retval = IRQ_NONE;
|
|
struct ufs_hba *hba = __hba;
|
|
|
|
spin_lock(hba->host->host_lock);
|
|
intr_status = ufshcd_readl(hba, REG_INTERRUPT_STATUS);
|
|
|
|
if (intr_status) {
|
|
ufshcd_writel(hba, intr_status, REG_INTERRUPT_STATUS);
|
|
ufshcd_sl_intr(hba, intr_status);
|
|
retval = IRQ_HANDLED;
|
|
}
|
|
spin_unlock(hba->host->host_lock);
|
|
return retval;
|
|
}
|
|
|
|
static int ufshcd_clear_tm_cmd(struct ufs_hba *hba, int tag)
|
|
{
|
|
int err = 0;
|
|
u32 mask = 1 << tag;
|
|
unsigned long flags;
|
|
|
|
if (!test_bit(tag, &hba->outstanding_tasks))
|
|
goto out;
|
|
|
|
spin_lock_irqsave(hba->host->host_lock, flags);
|
|
ufshcd_writel(hba, ~(1 << tag), REG_UTP_TASK_REQ_LIST_CLEAR);
|
|
spin_unlock_irqrestore(hba->host->host_lock, flags);
|
|
|
|
/* poll for max. 1 sec to clear door bell register by h/w */
|
|
err = ufshcd_wait_for_register(hba,
|
|
REG_UTP_TASK_REQ_DOOR_BELL,
|
|
mask, 0, 1000, 1000);
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_issue_tm_cmd - issues task management commands to controller
|
|
* @hba: per adapter instance
|
|
* @lun_id: LUN ID to which TM command is sent
|
|
* @task_id: task ID to which the TM command is applicable
|
|
* @tm_function: task management function opcode
|
|
* @tm_response: task management service response return value
|
|
*
|
|
* Returns non-zero value on error, zero on success.
|
|
*/
|
|
static int ufshcd_issue_tm_cmd(struct ufs_hba *hba, int lun_id, int task_id,
|
|
u8 tm_function, u8 *tm_response)
|
|
{
|
|
struct utp_task_req_desc *task_req_descp;
|
|
struct utp_upiu_task_req *task_req_upiup;
|
|
struct Scsi_Host *host;
|
|
unsigned long flags;
|
|
int free_slot;
|
|
int err;
|
|
int task_tag;
|
|
|
|
host = hba->host;
|
|
|
|
/*
|
|
* Get free slot, sleep if slots are unavailable.
|
|
* Even though we use wait_event() which sleeps indefinitely,
|
|
* the maximum wait time is bounded by %TM_CMD_TIMEOUT.
|
|
*/
|
|
wait_event(hba->tm_tag_wq, ufshcd_get_tm_free_slot(hba, &free_slot));
|
|
|
|
spin_lock_irqsave(host->host_lock, flags);
|
|
task_req_descp = hba->utmrdl_base_addr;
|
|
task_req_descp += free_slot;
|
|
|
|
/* Configure task request descriptor */
|
|
task_req_descp->header.dword_0 = cpu_to_le32(UTP_REQ_DESC_INT_CMD);
|
|
task_req_descp->header.dword_2 =
|
|
cpu_to_le32(OCS_INVALID_COMMAND_STATUS);
|
|
|
|
/* Configure task request UPIU */
|
|
task_req_upiup =
|
|
(struct utp_upiu_task_req *) task_req_descp->task_req_upiu;
|
|
task_tag = hba->nutrs + free_slot;
|
|
task_req_upiup->header.dword_0 =
|
|
UPIU_HEADER_DWORD(UPIU_TRANSACTION_TASK_REQ, 0,
|
|
lun_id, task_tag);
|
|
task_req_upiup->header.dword_1 =
|
|
UPIU_HEADER_DWORD(0, tm_function, 0, 0);
|
|
|
|
task_req_upiup->input_param1 = cpu_to_be32(lun_id);
|
|
task_req_upiup->input_param2 = cpu_to_be32(task_id);
|
|
|
|
/* send command to the controller */
|
|
__set_bit(free_slot, &hba->outstanding_tasks);
|
|
ufshcd_writel(hba, 1 << free_slot, REG_UTP_TASK_REQ_DOOR_BELL);
|
|
|
|
spin_unlock_irqrestore(host->host_lock, flags);
|
|
|
|
/* wait until the task management command is completed */
|
|
err = wait_event_timeout(hba->tm_wq,
|
|
test_bit(free_slot, &hba->tm_condition),
|
|
msecs_to_jiffies(TM_CMD_TIMEOUT));
|
|
if (!err) {
|
|
dev_err(hba->dev, "%s: task management cmd 0x%.2x timed-out\n",
|
|
__func__, tm_function);
|
|
if (ufshcd_clear_tm_cmd(hba, free_slot))
|
|
dev_WARN(hba->dev, "%s: unable clear tm cmd (slot %d) after timeout\n",
|
|
__func__, free_slot);
|
|
err = -ETIMEDOUT;
|
|
} else {
|
|
err = ufshcd_task_req_compl(hba, free_slot, tm_response);
|
|
}
|
|
|
|
clear_bit(free_slot, &hba->tm_condition);
|
|
ufshcd_put_tm_slot(hba, free_slot);
|
|
wake_up(&hba->tm_tag_wq);
|
|
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_eh_device_reset_handler - device reset handler registered to
|
|
* scsi layer.
|
|
* @cmd: SCSI command pointer
|
|
*
|
|
* Returns SUCCESS/FAILED
|
|
*/
|
|
static int ufshcd_eh_device_reset_handler(struct scsi_cmnd *cmd)
|
|
{
|
|
struct Scsi_Host *host;
|
|
struct ufs_hba *hba;
|
|
unsigned int tag;
|
|
u32 pos;
|
|
int err;
|
|
u8 resp = 0xF;
|
|
struct ufshcd_lrb *lrbp;
|
|
unsigned long flags;
|
|
|
|
host = cmd->device->host;
|
|
hba = shost_priv(host);
|
|
tag = cmd->request->tag;
|
|
|
|
lrbp = &hba->lrb[tag];
|
|
err = ufshcd_issue_tm_cmd(hba, lrbp->lun, 0, UFS_LOGICAL_RESET, &resp);
|
|
if (err || resp != UPIU_TASK_MANAGEMENT_FUNC_COMPL) {
|
|
if (!err)
|
|
err = resp;
|
|
goto out;
|
|
}
|
|
|
|
/* clear the commands that were pending for corresponding LUN */
|
|
for_each_set_bit(pos, &hba->outstanding_reqs, hba->nutrs) {
|
|
if (hba->lrb[pos].lun == lrbp->lun) {
|
|
err = ufshcd_clear_cmd(hba, pos);
|
|
if (err)
|
|
break;
|
|
}
|
|
}
|
|
spin_lock_irqsave(host->host_lock, flags);
|
|
ufshcd_transfer_req_compl(hba);
|
|
spin_unlock_irqrestore(host->host_lock, flags);
|
|
out:
|
|
if (!err) {
|
|
err = SUCCESS;
|
|
} else {
|
|
dev_err(hba->dev, "%s: failed with err %d\n", __func__, err);
|
|
err = FAILED;
|
|
}
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_abort - abort a specific command
|
|
* @cmd: SCSI command pointer
|
|
*
|
|
* Abort the pending command in device by sending UFS_ABORT_TASK task management
|
|
* command, and in host controller by clearing the door-bell register. There can
|
|
* be race between controller sending the command to the device while abort is
|
|
* issued. To avoid that, first issue UFS_QUERY_TASK to check if the command is
|
|
* really issued and then try to abort it.
|
|
*
|
|
* Returns SUCCESS/FAILED
|
|
*/
|
|
static int ufshcd_abort(struct scsi_cmnd *cmd)
|
|
{
|
|
struct Scsi_Host *host;
|
|
struct ufs_hba *hba;
|
|
unsigned long flags;
|
|
unsigned int tag;
|
|
int err = 0;
|
|
int poll_cnt;
|
|
u8 resp = 0xF;
|
|
struct ufshcd_lrb *lrbp;
|
|
|
|
host = cmd->device->host;
|
|
hba = shost_priv(host);
|
|
tag = cmd->request->tag;
|
|
|
|
/* If command is already aborted/completed, return SUCCESS */
|
|
if (!(test_bit(tag, &hba->outstanding_reqs)))
|
|
goto out;
|
|
|
|
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 */
|
|
break;
|
|
} else if (!err && resp == UPIU_TASK_MANAGEMENT_FUNC_COMPL) {
|
|
u32 reg;
|
|
|
|
/*
|
|
* cmd not pending in the device, check if it is
|
|
* in transition.
|
|
*/
|
|
reg = ufshcd_readl(hba, REG_UTP_TRANSFER_REQ_DOOR_BELL);
|
|
if (reg & (1 << tag)) {
|
|
/* sleep for max. 200us to stabilize */
|
|
usleep_range(100, 200);
|
|
continue;
|
|
}
|
|
/* command completed already */
|
|
goto out;
|
|
} else {
|
|
if (!err)
|
|
err = resp; /* service response error */
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if (!poll_cnt) {
|
|
err = -EBUSY;
|
|
goto out;
|
|
}
|
|
|
|
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)
|
|
err = resp; /* service response error */
|
|
goto out;
|
|
}
|
|
|
|
err = ufshcd_clear_cmd(hba, tag);
|
|
if (err)
|
|
goto out;
|
|
|
|
scsi_dma_unmap(cmd);
|
|
|
|
spin_lock_irqsave(host->host_lock, flags);
|
|
__clear_bit(tag, &hba->outstanding_reqs);
|
|
hba->lrb[tag].cmd = NULL;
|
|
spin_unlock_irqrestore(host->host_lock, flags);
|
|
|
|
clear_bit_unlock(tag, &hba->lrb_in_use);
|
|
wake_up(&hba->dev_cmd.tag_wq);
|
|
out:
|
|
if (!err) {
|
|
err = SUCCESS;
|
|
} else {
|
|
dev_err(hba->dev, "%s: failed with err %d\n", __func__, err);
|
|
err = FAILED;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_host_reset_and_restore - reset and restore host controller
|
|
* @hba: per-adapter instance
|
|
*
|
|
* Note that host controller reset may issue DME_RESET to
|
|
* local and remote (device) Uni-Pro stack and the attributes
|
|
* are reset to default state.
|
|
*
|
|
* Returns zero on success, non-zero on failure
|
|
*/
|
|
static int ufshcd_host_reset_and_restore(struct ufs_hba *hba)
|
|
{
|
|
int err;
|
|
async_cookie_t cookie;
|
|
unsigned long flags;
|
|
|
|
/* Reset the host controller */
|
|
spin_lock_irqsave(hba->host->host_lock, flags);
|
|
ufshcd_hba_stop(hba);
|
|
spin_unlock_irqrestore(hba->host->host_lock, flags);
|
|
|
|
err = ufshcd_hba_enable(hba);
|
|
if (err)
|
|
goto out;
|
|
|
|
/* Establish the link again and restore the device */
|
|
cookie = async_schedule(ufshcd_async_scan, hba);
|
|
/* wait for async scan to be completed */
|
|
async_synchronize_cookie(++cookie);
|
|
if (hba->ufshcd_state != UFSHCD_STATE_OPERATIONAL)
|
|
err = -EIO;
|
|
out:
|
|
if (err)
|
|
dev_err(hba->dev, "%s: Host init failed %d\n", __func__, err);
|
|
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_reset_and_restore - reset and re-initialize host/device
|
|
* @hba: per-adapter instance
|
|
*
|
|
* Reset and recover device, host and re-establish link. This
|
|
* is helpful to recover the communication in fatal error conditions.
|
|
*
|
|
* Returns zero on success, non-zero on failure
|
|
*/
|
|
static int ufshcd_reset_and_restore(struct ufs_hba *hba)
|
|
{
|
|
int err = 0;
|
|
unsigned long flags;
|
|
|
|
err = ufshcd_host_reset_and_restore(hba);
|
|
|
|
/*
|
|
* After reset the door-bell might be cleared, complete
|
|
* outstanding requests in s/w here.
|
|
*/
|
|
spin_lock_irqsave(hba->host->host_lock, flags);
|
|
ufshcd_transfer_req_compl(hba);
|
|
ufshcd_tmc_handler(hba);
|
|
spin_unlock_irqrestore(hba->host->host_lock, flags);
|
|
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_eh_host_reset_handler - host reset handler registered to scsi layer
|
|
* @cmd - SCSI command pointer
|
|
*
|
|
* Returns SUCCESS/FAILED
|
|
*/
|
|
static int ufshcd_eh_host_reset_handler(struct scsi_cmnd *cmd)
|
|
{
|
|
int err;
|
|
unsigned long flags;
|
|
struct ufs_hba *hba;
|
|
|
|
hba = shost_priv(cmd->device->host);
|
|
|
|
/*
|
|
* Check if there is any race with fatal error handling.
|
|
* If so, wait for it to complete. Even though fatal error
|
|
* handling does reset and restore in some cases, don't assume
|
|
* anything out of it. We are just avoiding race here.
|
|
*/
|
|
do {
|
|
spin_lock_irqsave(hba->host->host_lock, flags);
|
|
if (!(work_pending(&hba->eh_work) ||
|
|
hba->ufshcd_state == UFSHCD_STATE_RESET))
|
|
break;
|
|
spin_unlock_irqrestore(hba->host->host_lock, flags);
|
|
dev_dbg(hba->dev, "%s: reset in progress\n", __func__);
|
|
flush_work(&hba->eh_work);
|
|
} while (1);
|
|
|
|
hba->ufshcd_state = UFSHCD_STATE_RESET;
|
|
ufshcd_set_eh_in_progress(hba);
|
|
spin_unlock_irqrestore(hba->host->host_lock, flags);
|
|
|
|
err = ufshcd_reset_and_restore(hba);
|
|
|
|
spin_lock_irqsave(hba->host->host_lock, flags);
|
|
if (!err) {
|
|
err = SUCCESS;
|
|
hba->ufshcd_state = UFSHCD_STATE_OPERATIONAL;
|
|
} else {
|
|
err = FAILED;
|
|
hba->ufshcd_state = UFSHCD_STATE_ERROR;
|
|
}
|
|
ufshcd_clear_eh_in_progress(hba);
|
|
spin_unlock_irqrestore(hba->host->host_lock, flags);
|
|
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_read_sdev_qdepth - read the lun command queue depth
|
|
* @hba: Pointer to adapter instance
|
|
* @sdev: pointer to SCSI device
|
|
*
|
|
* Return in case of success the lun's queue depth else error.
|
|
*/
|
|
static int ufshcd_read_sdev_qdepth(struct ufs_hba *hba,
|
|
struct scsi_device *sdev)
|
|
{
|
|
int ret;
|
|
int buff_len = UNIT_DESC_MAX_SIZE;
|
|
u8 desc_buf[UNIT_DESC_MAX_SIZE];
|
|
|
|
ret = ufshcd_query_descriptor(hba, UPIU_QUERY_OPCODE_READ_DESC,
|
|
QUERY_DESC_IDN_UNIT, sdev->lun, 0, desc_buf, &buff_len);
|
|
|
|
if (ret || (buff_len < UNIT_DESC_PARAM_LU_Q_DEPTH)) {
|
|
dev_err(hba->dev,
|
|
"%s:Failed reading unit descriptor. len = %d ret = %d"
|
|
, __func__, buff_len, ret);
|
|
if (!ret)
|
|
ret = -EINVAL;
|
|
|
|
goto out;
|
|
}
|
|
|
|
ret = desc_buf[UNIT_DESC_PARAM_LU_Q_DEPTH] & 0xFF;
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* ufshcd_async_scan - asynchronous execution for link startup
|
|
* @data: data pointer to pass to this function
|
|
* @cookie: cookie data
|
|
*/
|
|
static void ufshcd_async_scan(void *data, async_cookie_t cookie)
|
|
{
|
|
struct ufs_hba *hba = (struct ufs_hba *)data;
|
|
int ret;
|
|
|
|
ret = ufshcd_link_startup(hba);
|
|
if (ret)
|
|
goto out;
|
|
|
|
ufshcd_config_max_pwr_mode(hba);
|
|
|
|
ret = ufshcd_verify_dev_init(hba);
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = ufshcd_complete_dev_init(hba);
|
|
if (ret)
|
|
goto out;
|
|
|
|
ufshcd_force_reset_auto_bkops(hba);
|
|
hba->ufshcd_state = UFSHCD_STATE_OPERATIONAL;
|
|
|
|
/* If we are in error handling context no need to scan the host */
|
|
if (!ufshcd_eh_in_progress(hba)) {
|
|
scsi_scan_host(hba->host);
|
|
pm_runtime_put_sync(hba->dev);
|
|
}
|
|
out:
|
|
return;
|
|
}
|
|
|
|
static struct scsi_host_template ufshcd_driver_template = {
|
|
.module = THIS_MODULE,
|
|
.name = UFSHCD,
|
|
.proc_name = UFSHCD,
|
|
.queuecommand = ufshcd_queuecommand,
|
|
.slave_alloc = ufshcd_slave_alloc,
|
|
.slave_destroy = ufshcd_slave_destroy,
|
|
.change_queue_depth = ufshcd_change_queue_depth,
|
|
.eh_abort_handler = ufshcd_abort,
|
|
.eh_device_reset_handler = ufshcd_eh_device_reset_handler,
|
|
.eh_host_reset_handler = ufshcd_eh_host_reset_handler,
|
|
.this_id = -1,
|
|
.sg_tablesize = SG_ALL,
|
|
.cmd_per_lun = UFSHCD_CMD_PER_LUN,
|
|
.can_queue = UFSHCD_CAN_QUEUE,
|
|
};
|
|
|
|
/**
|
|
* ufshcd_suspend - suspend power management function
|
|
* @hba: per adapter instance
|
|
* @state: power state
|
|
*
|
|
* Returns -ENOSYS
|
|
*/
|
|
int ufshcd_suspend(struct ufs_hba *hba, pm_message_t state)
|
|
{
|
|
/*
|
|
* TODO:
|
|
* 1. Block SCSI requests from SCSI midlayer
|
|
* 2. Change the internal driver state to non operational
|
|
* 3. Set UTRLRSR and UTMRLRSR bits to zero
|
|
* 4. Wait until outstanding commands are completed
|
|
* 5. Set HCE to zero to send the UFS host controller to reset state
|
|
*/
|
|
|
|
return -ENOSYS;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ufshcd_suspend);
|
|
|
|
/**
|
|
* ufshcd_resume - resume power management function
|
|
* @hba: per adapter instance
|
|
*
|
|
* Returns -ENOSYS
|
|
*/
|
|
int ufshcd_resume(struct ufs_hba *hba)
|
|
{
|
|
/*
|
|
* TODO:
|
|
* 1. Set HCE to 1, to start the UFS host controller
|
|
* initialization process
|
|
* 2. Set UTRLRSR and UTMRLRSR bits to 1
|
|
* 3. Change the internal driver state to operational
|
|
* 4. Unblock SCSI requests from SCSI midlayer
|
|
*/
|
|
|
|
return -ENOSYS;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ufshcd_resume);
|
|
|
|
int ufshcd_runtime_suspend(struct ufs_hba *hba)
|
|
{
|
|
if (!hba)
|
|
return 0;
|
|
|
|
/*
|
|
* The device is idle with no requests in the queue,
|
|
* allow background operations.
|
|
*/
|
|
return ufshcd_enable_auto_bkops(hba);
|
|
}
|
|
EXPORT_SYMBOL(ufshcd_runtime_suspend);
|
|
|
|
int ufshcd_runtime_resume(struct ufs_hba *hba)
|
|
{
|
|
if (!hba)
|
|
return 0;
|
|
|
|
return ufshcd_disable_auto_bkops(hba);
|
|
}
|
|
EXPORT_SYMBOL(ufshcd_runtime_resume);
|
|
|
|
int ufshcd_runtime_idle(struct ufs_hba *hba)
|
|
{
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ufshcd_runtime_idle);
|
|
|
|
/**
|
|
* ufshcd_remove - de-allocate SCSI host and host memory space
|
|
* data structure memory
|
|
* @hba - per adapter instance
|
|
*/
|
|
void ufshcd_remove(struct ufs_hba *hba)
|
|
{
|
|
scsi_remove_host(hba->host);
|
|
/* disable interrupts */
|
|
ufshcd_disable_intr(hba, hba->intr_mask);
|
|
ufshcd_hba_stop(hba);
|
|
|
|
scsi_host_put(hba->host);
|
|
}
|
|
EXPORT_SYMBOL_GPL(ufshcd_remove);
|
|
|
|
/**
|
|
* ufshcd_init - Driver initialization routine
|
|
* @dev: pointer to device handle
|
|
* @hba_handle: driver private handle
|
|
* @mmio_base: base register address
|
|
* @irq: Interrupt line of device
|
|
* Returns 0 on success, non-zero value on failure
|
|
*/
|
|
int ufshcd_init(struct device *dev, struct ufs_hba **hba_handle,
|
|
void __iomem *mmio_base, unsigned int irq)
|
|
{
|
|
struct Scsi_Host *host;
|
|
struct ufs_hba *hba;
|
|
int err;
|
|
|
|
if (!dev) {
|
|
dev_err(dev,
|
|
"Invalid memory reference for dev is NULL\n");
|
|
err = -ENODEV;
|
|
goto out_error;
|
|
}
|
|
|
|
if (!mmio_base) {
|
|
dev_err(dev,
|
|
"Invalid memory reference for mmio_base is NULL\n");
|
|
err = -ENODEV;
|
|
goto out_error;
|
|
}
|
|
|
|
host = scsi_host_alloc(&ufshcd_driver_template,
|
|
sizeof(struct ufs_hba));
|
|
if (!host) {
|
|
dev_err(dev, "scsi_host_alloc failed\n");
|
|
err = -ENOMEM;
|
|
goto out_error;
|
|
}
|
|
hba = shost_priv(host);
|
|
hba->host = host;
|
|
hba->dev = dev;
|
|
hba->mmio_base = mmio_base;
|
|
hba->irq = irq;
|
|
|
|
/* Read capabilities registers */
|
|
ufshcd_hba_capabilities(hba);
|
|
|
|
/* Get UFS version supported by the controller */
|
|
hba->ufs_version = ufshcd_get_ufs_version(hba);
|
|
|
|
/* Get Interrupt bit mask per version */
|
|
hba->intr_mask = ufshcd_get_intr_mask(hba);
|
|
|
|
/* Allocate memory for host memory space */
|
|
err = ufshcd_memory_alloc(hba);
|
|
if (err) {
|
|
dev_err(hba->dev, "Memory allocation failed\n");
|
|
goto out_disable;
|
|
}
|
|
|
|
/* Configure LRB */
|
|
ufshcd_host_memory_configure(hba);
|
|
|
|
host->can_queue = hba->nutrs;
|
|
host->cmd_per_lun = hba->nutrs;
|
|
host->max_id = UFSHCD_MAX_ID;
|
|
host->max_lun = UFSHCD_MAX_LUNS;
|
|
host->max_channel = UFSHCD_MAX_CHANNEL;
|
|
host->unique_id = host->host_no;
|
|
host->max_cmd_len = MAX_CDB_SIZE;
|
|
|
|
/* Initailize wait queue for task management */
|
|
init_waitqueue_head(&hba->tm_wq);
|
|
init_waitqueue_head(&hba->tm_tag_wq);
|
|
|
|
/* Initialize work queues */
|
|
INIT_WORK(&hba->eh_work, ufshcd_err_handler);
|
|
INIT_WORK(&hba->eeh_work, ufshcd_exception_event_handler);
|
|
|
|
/* Initialize UIC command mutex */
|
|
mutex_init(&hba->uic_cmd_mutex);
|
|
|
|
/* Initialize mutex for device management commands */
|
|
mutex_init(&hba->dev_cmd.lock);
|
|
|
|
/* Initialize device management tag acquire wait queue */
|
|
init_waitqueue_head(&hba->dev_cmd.tag_wq);
|
|
|
|
/* IRQ registration */
|
|
err = devm_request_irq(dev, irq, ufshcd_intr, IRQF_SHARED, UFSHCD, hba);
|
|
if (err) {
|
|
dev_err(hba->dev, "request irq failed\n");
|
|
goto out_disable;
|
|
}
|
|
|
|
/* Enable SCSI tag mapping */
|
|
err = scsi_init_shared_tag_map(host, host->can_queue);
|
|
if (err) {
|
|
dev_err(hba->dev, "init shared queue failed\n");
|
|
goto out_disable;
|
|
}
|
|
|
|
err = scsi_add_host(host, hba->dev);
|
|
if (err) {
|
|
dev_err(hba->dev, "scsi_add_host failed\n");
|
|
goto out_disable;
|
|
}
|
|
|
|
/* Host controller enable */
|
|
err = ufshcd_hba_enable(hba);
|
|
if (err) {
|
|
dev_err(hba->dev, "Host controller enable failed\n");
|
|
goto out_remove_scsi_host;
|
|
}
|
|
|
|
*hba_handle = hba;
|
|
|
|
/* Hold auto suspend until async scan completes */
|
|
pm_runtime_get_sync(dev);
|
|
|
|
async_schedule(ufshcd_async_scan, hba);
|
|
|
|
return 0;
|
|
|
|
out_remove_scsi_host:
|
|
scsi_remove_host(hba->host);
|
|
out_disable:
|
|
scsi_host_put(host);
|
|
out_error:
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ufshcd_init);
|
|
|
|
MODULE_AUTHOR("Santosh Yaragnavi <santosh.sy@samsung.com>");
|
|
MODULE_AUTHOR("Vinayak Holikatti <h.vinayak@samsung.com>");
|
|
MODULE_DESCRIPTION("Generic UFS host controller driver Core");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_VERSION(UFSHCD_DRIVER_VERSION);
|