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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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e785060ea3
- Adding some of the definitions missing in unipro.h, including power enumeration. - Read Modify Write Line helper function - Indication for the type of suspend Signed-off-by: Dolev Raviv <draviv@codeaurora.org> Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org> Signed-off-by: Yaniv Gardi <ygardi@codeaurora.org> Signed-off-by: Christoph Hellwig <hch@lst.de>
599 lines
18 KiB
C
599 lines
18 KiB
C
/*
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* Universal Flash Storage Host controller driver
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*
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* This code is based on drivers/scsi/ufs/ufshcd.h
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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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#ifndef _UFSHCD_H
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#define _UFSHCD_H
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <linux/delay.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/workqueue.h>
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#include <linux/errno.h>
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#include <linux/types.h>
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#include <linux/wait.h>
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#include <linux/bitops.h>
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#include <linux/pm_runtime.h>
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#include <linux/clk.h>
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#include <linux/completion.h>
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#include <linux/regulator/consumer.h>
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#include <asm/irq.h>
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#include <asm/byteorder.h>
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#include <scsi/scsi.h>
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#include <scsi/scsi_cmnd.h>
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#include <scsi/scsi_host.h>
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#include <scsi/scsi_tcq.h>
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#include <scsi/scsi_dbg.h>
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#include <scsi/scsi_eh.h>
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#include "ufs.h"
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#include "ufshci.h"
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#define UFSHCD "ufshcd"
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#define UFSHCD_DRIVER_VERSION "0.2"
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struct ufs_hba;
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enum dev_cmd_type {
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DEV_CMD_TYPE_NOP = 0x0,
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DEV_CMD_TYPE_QUERY = 0x1,
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};
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/**
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* struct uic_command - UIC command structure
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* @command: UIC command
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* @argument1: UIC command argument 1
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* @argument2: UIC command argument 2
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* @argument3: UIC command argument 3
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* @cmd_active: Indicate if UIC command is outstanding
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* @result: UIC command result
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* @done: UIC command completion
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*/
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struct uic_command {
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u32 command;
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u32 argument1;
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u32 argument2;
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u32 argument3;
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int cmd_active;
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int result;
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struct completion done;
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};
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/* Used to differentiate the power management options */
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enum ufs_pm_op {
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UFS_RUNTIME_PM,
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UFS_SYSTEM_PM,
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UFS_SHUTDOWN_PM,
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};
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#define ufshcd_is_runtime_pm(op) ((op) == UFS_RUNTIME_PM)
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#define ufshcd_is_system_pm(op) ((op) == UFS_SYSTEM_PM)
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#define ufshcd_is_shutdown_pm(op) ((op) == UFS_SHUTDOWN_PM)
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/* Host <-> Device UniPro Link state */
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enum uic_link_state {
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UIC_LINK_OFF_STATE = 0, /* Link powered down or disabled */
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UIC_LINK_ACTIVE_STATE = 1, /* Link is in Fast/Slow/Sleep state */
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UIC_LINK_HIBERN8_STATE = 2, /* Link is in Hibernate state */
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};
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#define ufshcd_is_link_off(hba) ((hba)->uic_link_state == UIC_LINK_OFF_STATE)
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#define ufshcd_is_link_active(hba) ((hba)->uic_link_state == \
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UIC_LINK_ACTIVE_STATE)
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#define ufshcd_is_link_hibern8(hba) ((hba)->uic_link_state == \
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UIC_LINK_HIBERN8_STATE)
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#define ufshcd_set_link_off(hba) ((hba)->uic_link_state = UIC_LINK_OFF_STATE)
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#define ufshcd_set_link_active(hba) ((hba)->uic_link_state = \
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UIC_LINK_ACTIVE_STATE)
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#define ufshcd_set_link_hibern8(hba) ((hba)->uic_link_state = \
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UIC_LINK_HIBERN8_STATE)
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/*
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* UFS Power management levels.
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* Each level is in increasing order of power savings.
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*/
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enum ufs_pm_level {
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UFS_PM_LVL_0, /* UFS_ACTIVE_PWR_MODE, UIC_LINK_ACTIVE_STATE */
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UFS_PM_LVL_1, /* UFS_ACTIVE_PWR_MODE, UIC_LINK_HIBERN8_STATE */
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UFS_PM_LVL_2, /* UFS_SLEEP_PWR_MODE, UIC_LINK_ACTIVE_STATE */
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UFS_PM_LVL_3, /* UFS_SLEEP_PWR_MODE, UIC_LINK_HIBERN8_STATE */
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UFS_PM_LVL_4, /* UFS_POWERDOWN_PWR_MODE, UIC_LINK_HIBERN8_STATE */
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UFS_PM_LVL_5, /* UFS_POWERDOWN_PWR_MODE, UIC_LINK_OFF_STATE */
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UFS_PM_LVL_MAX
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};
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struct ufs_pm_lvl_states {
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enum ufs_dev_pwr_mode dev_state;
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enum uic_link_state link_state;
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};
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/**
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* struct ufshcd_lrb - local reference block
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* @utr_descriptor_ptr: UTRD address of the command
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* @ucd_req_ptr: UCD address of the command
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* @ucd_rsp_ptr: Response UPIU address for this command
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* @ucd_prdt_ptr: PRDT address of the command
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* @cmd: pointer to SCSI command
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* @sense_buffer: pointer to sense buffer address of the SCSI command
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* @sense_bufflen: Length of the sense buffer
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* @scsi_status: SCSI status of the command
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* @command_type: SCSI, UFS, Query.
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* @task_tag: Task tag of the command
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* @lun: LUN of the command
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* @intr_cmd: Interrupt command (doesn't participate in interrupt aggregation)
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*/
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struct ufshcd_lrb {
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struct utp_transfer_req_desc *utr_descriptor_ptr;
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struct utp_upiu_req *ucd_req_ptr;
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struct utp_upiu_rsp *ucd_rsp_ptr;
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struct ufshcd_sg_entry *ucd_prdt_ptr;
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struct scsi_cmnd *cmd;
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u8 *sense_buffer;
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unsigned int sense_bufflen;
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int scsi_status;
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int command_type;
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int task_tag;
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u8 lun; /* UPIU LUN id field is only 8-bit wide */
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bool intr_cmd;
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};
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/**
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* struct ufs_query - holds relevent data structures for query request
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* @request: request upiu and function
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* @descriptor: buffer for sending/receiving descriptor
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* @response: response upiu and response
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*/
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struct ufs_query {
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struct ufs_query_req request;
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u8 *descriptor;
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struct ufs_query_res response;
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};
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/**
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* struct ufs_dev_cmd - all assosiated fields with device management commands
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* @type: device management command type - Query, NOP OUT
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* @lock: lock to allow one command at a time
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* @complete: internal commands completion
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* @tag_wq: wait queue until free command slot is available
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*/
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struct ufs_dev_cmd {
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enum dev_cmd_type type;
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struct mutex lock;
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struct completion *complete;
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wait_queue_head_t tag_wq;
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struct ufs_query query;
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};
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/**
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* struct ufs_clk_info - UFS clock related info
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* @list: list headed by hba->clk_list_head
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* @clk: clock node
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* @name: clock name
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* @max_freq: maximum frequency supported by the clock
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* @min_freq: min frequency that can be used for clock scaling
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* @curr_freq: indicates the current frequency that it is set to
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* @enabled: variable to check against multiple enable/disable
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*/
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struct ufs_clk_info {
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struct list_head list;
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struct clk *clk;
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const char *name;
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u32 max_freq;
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u32 min_freq;
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u32 curr_freq;
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bool enabled;
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};
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#define PRE_CHANGE 0
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#define POST_CHANGE 1
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struct ufs_pa_layer_attr {
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u32 gear_rx;
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u32 gear_tx;
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u32 lane_rx;
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u32 lane_tx;
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u32 pwr_rx;
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u32 pwr_tx;
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u32 hs_rate;
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};
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struct ufs_pwr_mode_info {
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bool is_valid;
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struct ufs_pa_layer_attr info;
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};
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/**
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* struct ufs_hba_variant_ops - variant specific callbacks
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* @name: variant name
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* @init: called when the driver is initialized
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* @exit: called to cleanup everything done in init
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* @clk_scale_notify: notifies that clks are scaled up/down
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* @setup_clocks: called before touching any of the controller registers
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* @setup_regulators: called before accessing the host controller
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* @hce_enable_notify: called before and after HCE enable bit is set to allow
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* variant specific Uni-Pro initialization.
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* @link_startup_notify: called before and after Link startup is carried out
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* to allow variant specific Uni-Pro initialization.
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* @pwr_change_notify: called before and after a power mode change
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* is carried out to allow vendor spesific capabilities
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* to be set.
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* @suspend: called during host controller PM callback
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* @resume: called during host controller PM callback
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*/
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struct ufs_hba_variant_ops {
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const char *name;
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int (*init)(struct ufs_hba *);
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void (*exit)(struct ufs_hba *);
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void (*clk_scale_notify)(struct ufs_hba *);
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int (*setup_clocks)(struct ufs_hba *, bool);
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int (*setup_regulators)(struct ufs_hba *, bool);
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int (*hce_enable_notify)(struct ufs_hba *, bool);
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int (*link_startup_notify)(struct ufs_hba *, bool);
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int (*pwr_change_notify)(struct ufs_hba *,
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bool, struct ufs_pa_layer_attr *,
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struct ufs_pa_layer_attr *);
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int (*suspend)(struct ufs_hba *, enum ufs_pm_op);
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int (*resume)(struct ufs_hba *, enum ufs_pm_op);
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};
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/* clock gating state */
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enum clk_gating_state {
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CLKS_OFF,
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CLKS_ON,
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REQ_CLKS_OFF,
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REQ_CLKS_ON,
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};
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/**
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* struct ufs_clk_gating - UFS clock gating related info
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* @gate_work: worker to turn off clocks after some delay as specified in
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* delay_ms
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* @ungate_work: worker to turn on clocks that will be used in case of
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* interrupt context
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* @state: the current clocks state
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* @delay_ms: gating delay in ms
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* @is_suspended: clk gating is suspended when set to 1 which can be used
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* during suspend/resume
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* @delay_attr: sysfs attribute to control delay_attr
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* @active_reqs: number of requests that are pending and should be waited for
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* completion before gating clocks.
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*/
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struct ufs_clk_gating {
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struct delayed_work gate_work;
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struct work_struct ungate_work;
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enum clk_gating_state state;
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unsigned long delay_ms;
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bool is_suspended;
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struct device_attribute delay_attr;
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int active_reqs;
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};
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struct ufs_clk_scaling {
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ktime_t busy_start_t;
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bool is_busy_started;
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unsigned long tot_busy_t;
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unsigned long window_start_t;
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};
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/**
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* struct ufs_init_prefetch - contains data that is pre-fetched once during
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* initialization
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* @icc_level: icc level which was read during initialization
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*/
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struct ufs_init_prefetch {
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u32 icc_level;
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};
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/**
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* struct ufs_hba - per adapter private structure
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* @mmio_base: UFSHCI base register address
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* @ucdl_base_addr: UFS Command Descriptor base address
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* @utrdl_base_addr: UTP Transfer Request Descriptor base address
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* @utmrdl_base_addr: UTP Task Management Descriptor base address
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* @ucdl_dma_addr: UFS Command Descriptor DMA address
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* @utrdl_dma_addr: UTRDL DMA address
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* @utmrdl_dma_addr: UTMRDL DMA address
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* @host: Scsi_Host instance of the driver
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* @dev: device handle
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* @lrb: local reference block
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* @lrb_in_use: lrb in use
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* @outstanding_tasks: Bits representing outstanding task requests
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* @outstanding_reqs: Bits representing outstanding transfer requests
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* @capabilities: UFS Controller Capabilities
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* @nutrs: Transfer Request Queue depth supported by controller
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* @nutmrs: Task Management Queue depth supported by controller
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* @ufs_version: UFS Version to which controller complies
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* @vops: pointer to variant specific operations
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* @priv: pointer to variant specific private data
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* @irq: Irq number of the controller
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* @active_uic_cmd: handle of active UIC command
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* @uic_cmd_mutex: mutex for uic command
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* @tm_wq: wait queue for task management
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* @tm_tag_wq: wait queue for free task management slots
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* @tm_slots_in_use: bit map of task management request slots in use
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* @pwr_done: completion for power mode change
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* @tm_condition: condition variable for task management
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* @ufshcd_state: UFSHCD states
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* @eh_flags: Error handling flags
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* @intr_mask: Interrupt Mask Bits
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* @ee_ctrl_mask: Exception event control mask
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* @is_powered: flag to check if HBA is powered
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* @is_init_prefetch: flag to check if data was pre-fetched in initialization
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* @init_prefetch_data: data pre-fetched during initialization
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* @eh_work: Worker to handle UFS errors that require s/w attention
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* @eeh_work: Worker to handle exception events
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* @errors: HBA errors
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* @uic_error: UFS interconnect layer error status
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* @saved_err: sticky error mask
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* @saved_uic_err: sticky UIC error mask
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* @dev_cmd: ufs device management command information
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* @auto_bkops_enabled: to track whether bkops is enabled in device
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* @vreg_info: UFS device voltage regulator information
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* @clk_list_head: UFS host controller clocks list node head
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* @pwr_info: holds current power mode
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* @max_pwr_info: keeps the device max valid pwm
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*/
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struct ufs_hba {
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void __iomem *mmio_base;
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/* Virtual memory reference */
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struct utp_transfer_cmd_desc *ucdl_base_addr;
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struct utp_transfer_req_desc *utrdl_base_addr;
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struct utp_task_req_desc *utmrdl_base_addr;
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/* DMA memory reference */
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dma_addr_t ucdl_dma_addr;
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dma_addr_t utrdl_dma_addr;
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dma_addr_t utmrdl_dma_addr;
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struct Scsi_Host *host;
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struct device *dev;
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/*
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* This field is to keep a reference to "scsi_device" corresponding to
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* "UFS device" W-LU.
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*/
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struct scsi_device *sdev_ufs_device;
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struct scsi_device *sdev_rpmb;
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struct scsi_device *sdev_boot;
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enum ufs_dev_pwr_mode curr_dev_pwr_mode;
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enum uic_link_state uic_link_state;
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/* Desired UFS power management level during runtime PM */
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enum ufs_pm_level rpm_lvl;
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/* Desired UFS power management level during system PM */
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enum ufs_pm_level spm_lvl;
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int pm_op_in_progress;
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struct ufshcd_lrb *lrb;
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unsigned long lrb_in_use;
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unsigned long outstanding_tasks;
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unsigned long outstanding_reqs;
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u32 capabilities;
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int nutrs;
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int nutmrs;
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u32 ufs_version;
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struct ufs_hba_variant_ops *vops;
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void *priv;
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unsigned int irq;
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bool is_irq_enabled;
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wait_queue_head_t tm_wq;
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wait_queue_head_t tm_tag_wq;
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unsigned long tm_condition;
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unsigned long tm_slots_in_use;
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struct uic_command *active_uic_cmd;
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struct mutex uic_cmd_mutex;
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struct completion *uic_async_done;
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u32 ufshcd_state;
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u32 eh_flags;
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u32 intr_mask;
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u16 ee_ctrl_mask;
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bool is_powered;
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bool is_init_prefetch;
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struct ufs_init_prefetch init_prefetch_data;
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/* Work Queues */
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struct work_struct eh_work;
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struct work_struct eeh_work;
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/* HBA Errors */
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u32 errors;
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u32 uic_error;
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u32 saved_err;
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u32 saved_uic_err;
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/* Device management request data */
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struct ufs_dev_cmd dev_cmd;
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/* Keeps information of the UFS device connected to this host */
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struct ufs_dev_info dev_info;
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bool auto_bkops_enabled;
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struct ufs_vreg_info vreg_info;
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struct list_head clk_list_head;
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bool wlun_dev_clr_ua;
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struct ufs_pa_layer_attr pwr_info;
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struct ufs_pwr_mode_info max_pwr_info;
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struct ufs_clk_gating clk_gating;
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/* Control to enable/disable host capabilities */
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u32 caps;
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/* Allow dynamic clk gating */
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#define UFSHCD_CAP_CLK_GATING (1 << 0)
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/* Allow hiberb8 with clk gating */
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#define UFSHCD_CAP_HIBERN8_WITH_CLK_GATING (1 << 1)
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/* Allow dynamic clk scaling */
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#define UFSHCD_CAP_CLK_SCALING (1 << 2)
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/* Allow auto bkops to enabled during runtime suspend */
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#define UFSHCD_CAP_AUTO_BKOPS_SUSPEND (1 << 3)
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|
|
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struct devfreq *devfreq;
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struct ufs_clk_scaling clk_scaling;
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|
bool is_sys_suspended;
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};
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|
|
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/* Returns true if clocks can be gated. Otherwise false */
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static inline bool ufshcd_is_clkgating_allowed(struct ufs_hba *hba)
|
|
{
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|
return hba->caps & UFSHCD_CAP_CLK_GATING;
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|
}
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|
static inline bool ufshcd_can_hibern8_during_gating(struct ufs_hba *hba)
|
|
{
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|
return hba->caps & UFSHCD_CAP_HIBERN8_WITH_CLK_GATING;
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|
}
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static inline int ufshcd_is_clkscaling_enabled(struct ufs_hba *hba)
|
|
{
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|
return hba->caps & UFSHCD_CAP_CLK_SCALING;
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|
}
|
|
static inline bool ufshcd_can_autobkops_during_suspend(struct ufs_hba *hba)
|
|
{
|
|
return hba->caps & UFSHCD_CAP_AUTO_BKOPS_SUSPEND;
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|
}
|
|
|
|
#define ufshcd_writel(hba, val, reg) \
|
|
writel((val), (hba)->mmio_base + (reg))
|
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#define ufshcd_readl(hba, reg) \
|
|
readl((hba)->mmio_base + (reg))
|
|
|
|
/**
|
|
* ufshcd_rmwl - read modify write into a register
|
|
* @hba - per adapter instance
|
|
* @mask - mask to apply on read value
|
|
* @val - actual value to write
|
|
* @reg - register address
|
|
*/
|
|
static inline void ufshcd_rmwl(struct ufs_hba *hba, u32 mask, u32 val, u32 reg)
|
|
{
|
|
u32 tmp;
|
|
|
|
tmp = ufshcd_readl(hba, reg);
|
|
tmp &= ~mask;
|
|
tmp |= (val & mask);
|
|
ufshcd_writel(hba, tmp, reg);
|
|
}
|
|
|
|
int ufshcd_alloc_host(struct device *, struct ufs_hba **);
|
|
int ufshcd_init(struct ufs_hba * , void __iomem * , unsigned int);
|
|
void ufshcd_remove(struct ufs_hba *);
|
|
|
|
/**
|
|
* ufshcd_hba_stop - Send controller to reset state
|
|
* @hba: per adapter instance
|
|
*/
|
|
static inline void ufshcd_hba_stop(struct ufs_hba *hba)
|
|
{
|
|
ufshcd_writel(hba, CONTROLLER_DISABLE, REG_CONTROLLER_ENABLE);
|
|
}
|
|
|
|
static inline void check_upiu_size(void)
|
|
{
|
|
BUILD_BUG_ON(ALIGNED_UPIU_SIZE <
|
|
GENERAL_UPIU_REQUEST_SIZE + QUERY_DESC_MAX_SIZE);
|
|
}
|
|
|
|
extern int ufshcd_runtime_suspend(struct ufs_hba *hba);
|
|
extern int ufshcd_runtime_resume(struct ufs_hba *hba);
|
|
extern int ufshcd_runtime_idle(struct ufs_hba *hba);
|
|
extern int ufshcd_system_suspend(struct ufs_hba *hba);
|
|
extern int ufshcd_system_resume(struct ufs_hba *hba);
|
|
extern int ufshcd_shutdown(struct ufs_hba *hba);
|
|
extern int ufshcd_dme_set_attr(struct ufs_hba *hba, u32 attr_sel,
|
|
u8 attr_set, u32 mib_val, u8 peer);
|
|
extern int ufshcd_dme_get_attr(struct ufs_hba *hba, u32 attr_sel,
|
|
u32 *mib_val, u8 peer);
|
|
|
|
/* UIC command interfaces for DME primitives */
|
|
#define DME_LOCAL 0
|
|
#define DME_PEER 1
|
|
#define ATTR_SET_NOR 0 /* NORMAL */
|
|
#define ATTR_SET_ST 1 /* STATIC */
|
|
|
|
static inline int ufshcd_dme_set(struct ufs_hba *hba, u32 attr_sel,
|
|
u32 mib_val)
|
|
{
|
|
return ufshcd_dme_set_attr(hba, attr_sel, ATTR_SET_NOR,
|
|
mib_val, DME_LOCAL);
|
|
}
|
|
|
|
static inline int ufshcd_dme_st_set(struct ufs_hba *hba, u32 attr_sel,
|
|
u32 mib_val)
|
|
{
|
|
return ufshcd_dme_set_attr(hba, attr_sel, ATTR_SET_ST,
|
|
mib_val, DME_LOCAL);
|
|
}
|
|
|
|
static inline int ufshcd_dme_peer_set(struct ufs_hba *hba, u32 attr_sel,
|
|
u32 mib_val)
|
|
{
|
|
return ufshcd_dme_set_attr(hba, attr_sel, ATTR_SET_NOR,
|
|
mib_val, DME_PEER);
|
|
}
|
|
|
|
static inline int ufshcd_dme_peer_st_set(struct ufs_hba *hba, u32 attr_sel,
|
|
u32 mib_val)
|
|
{
|
|
return ufshcd_dme_set_attr(hba, attr_sel, ATTR_SET_ST,
|
|
mib_val, DME_PEER);
|
|
}
|
|
|
|
static inline int ufshcd_dme_get(struct ufs_hba *hba,
|
|
u32 attr_sel, u32 *mib_val)
|
|
{
|
|
return ufshcd_dme_get_attr(hba, attr_sel, mib_val, DME_LOCAL);
|
|
}
|
|
|
|
static inline int ufshcd_dme_peer_get(struct ufs_hba *hba,
|
|
u32 attr_sel, u32 *mib_val)
|
|
{
|
|
return ufshcd_dme_get_attr(hba, attr_sel, mib_val, DME_PEER);
|
|
}
|
|
|
|
int ufshcd_hold(struct ufs_hba *hba, bool async);
|
|
void ufshcd_release(struct ufs_hba *hba);
|
|
#endif /* End of Header */
|