drivers/scsi/ufs/ufshcd.h

   1 /*
   2  * Universal Flash Storage Host controller driver
   3  *
   4  * This code is based on drivers/scsi/ufs/ufshcd.h
   5  * Copyright (C) 2011-2013 Samsung India Software Operations
   6  *
   7  * Authors:
   8  *      Santosh Yaraganavi <santosh.sy@samsung.com>
   9  *      Vinayak Holikatti <h.vinayak@samsung.com>
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License
  13  * as published by the Free Software Foundation; either version 2
  14  * of the License, or (at your option) any later version.
  15  * See the COPYING file in the top-level directory or visit
  16  * <http://www.gnu.org/licenses/gpl-2.0.html>
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * This program is provided "AS IS" and "WITH ALL FAULTS" and
  24  * without warranty of any kind. You are solely responsible for
  25  * determining the appropriateness of using and distributing
  26  * the program and assume all risks associated with your exercise
  27  * of rights with respect to the program, including but not limited
  28  * to infringement of third party rights, the risks and costs of
  29  * program errors, damage to or loss of data, programs or equipment,
  30  * and unavailability or interruption of operations. Under no
  31  * circumstances will the contributor of this Program be liable for
  32  * any damages of any kind arising from your use or distribution of
  33  * this program.
  34  */
  35
  36 #ifndef _UFSHCD_H
  37 #define _UFSHCD_H
  38
  39 #include <linux/module.h>
  40 #include <linux/kernel.h>
  41 #include <linux/init.h>
  42 #include <linux/interrupt.h>
  43 #include <linux/io.h>
  44 #include <linux/delay.h>
  45 #include <linux/slab.h>
  46 #include <linux/spinlock.h>
  47 #include <linux/workqueue.h>
  48 #include <linux/errno.h>
  49 #include <linux/types.h>
  50 #include <linux/wait.h>
  51 #include <linux/bitops.h>
  52 #include <linux/pm_runtime.h>
  53 #include <linux/clk.h>
  54
  55 #include <asm/irq.h>
  56 #include <asm/byteorder.h>
  57 #include <scsi/scsi.h>
  58 #include <scsi/scsi_cmnd.h>
  59 #include <scsi/scsi_host.h>
  60 #include <scsi/scsi_tcq.h>
  61 #include <scsi/scsi_dbg.h>
  62 #include <scsi/scsi_eh.h>
  63
  64 #include "ufs.h"
  65 #include "ufshci.h"
  66
  67 #define UFSHCD "ufshcd"
  68 #define UFSHCD_DRIVER_VERSION "0.2"
  69
  70 /**
  71  * struct uic_command - UIC command structure
  72  * @command: UIC command
  73  * @argument1: UIC command argument 1
  74  * @argument2: UIC command argument 2
  75  * @argument3: UIC command argument 3
  76  * @cmd_active: Indicate if UIC command is outstanding
  77  * @result: UIC command result
  78  */
  79 struct uic_command {
  80         u32 command;
  81         u32 argument1;
  82         u32 argument2;
  83         u32 argument3;
  84         int cmd_active;
  85         int result;
  86 };
  87
  88 /**
  89  * struct ufshcd_lrb - local reference block
  90  * @utr_descriptor_ptr: UTRD address of the command
  91  * @ucd_cmd_ptr: UCD address of the command
  92  * @ucd_rsp_ptr: Response UPIU address for this command
  93  * @ucd_prdt_ptr: PRDT address of the command
  94  * @cmd: pointer to SCSI command
  95  * @sense_buffer: pointer to sense buffer address of the SCSI command
  96  * @sense_bufflen: Length of the sense buffer
  97  * @scsi_status: SCSI status of the command
  98  * @command_type: SCSI, UFS, Query.
  99  * @task_tag: Task tag of the command
 100  * @lun: LUN of the command
 101  */
 102 struct ufshcd_lrb {
 103         struct utp_transfer_req_desc *utr_descriptor_ptr;
 104         struct utp_upiu_cmd *ucd_cmd_ptr;
 105         struct utp_upiu_rsp *ucd_rsp_ptr;
 106         struct ufshcd_sg_entry *ucd_prdt_ptr;
 107
 108         struct scsi_cmnd *cmd;
 109         u8 *sense_buffer;
 110         unsigned int sense_bufflen;
 111         int scsi_status;
 112
 113         int command_type;
 114         int task_tag;
 115         unsigned int lun;
 116 };
 117
 118
 119 /**
 120  * struct ufs_hba - per adapter private structure
 121  * @mmio_base: UFSHCI base register address
 122  * @ucdl_base_addr: UFS Command Descriptor base address
 123  * @utrdl_base_addr: UTP Transfer Request Descriptor base address
 124  * @utmrdl_base_addr: UTP Task Management Descriptor base address
 125  * @ucdl_dma_addr: UFS Command Descriptor DMA address
 126  * @utrdl_dma_addr: UTRDL DMA address
 127  * @utmrdl_dma_addr: UTMRDL DMA address
 128  * @host: Scsi_Host instance of the driver
 129  * @dev: device handle
 130  * @lrb: local reference block
 131  * @outstanding_tasks: Bits representing outstanding task requests
 132  * @outstanding_reqs: Bits representing outstanding transfer requests
 133  * @capabilities: UFS Controller Capabilities
 134  * @nutrs: Transfer Request Queue depth supported by controller
 135  * @nutmrs: Task Management Queue depth supported by controller
 136  * @ufs_version: UFS Version to which controller complies
 137  * @irq: Irq number of the controller
 138  * @active_uic_cmd: handle of active UIC command
 139  * @ufshcd_tm_wait_queue: wait queue for task management
 140  * @tm_condition: condition variable for task management
 141  * @ufshcd_state: UFSHCD states
 142  * @int_enable_mask: Interrupt Mask Bits
 143  * @uic_workq: Work queue for UIC completion handling
 144  * @feh_workq: Work queue for fatal controller error handling
 145  * @errors: HBA errors
 146  */
 147 struct ufs_hba {
 148         void __iomem *mmio_base;
 149
 150         /* Virtual memory reference */
 151         struct utp_transfer_cmd_desc *ucdl_base_addr;
 152         struct utp_transfer_req_desc *utrdl_base_addr;
 153         struct utp_task_req_desc *utmrdl_base_addr;
 154
 155         /* DMA memory reference */
 156         dma_addr_t ucdl_dma_addr;
 157         dma_addr_t utrdl_dma_addr;
 158         dma_addr_t utmrdl_dma_addr;
 159
 160         struct Scsi_Host *host;
 161         struct device *dev;
 162
 163         struct ufshcd_lrb *lrb;
 164
 165         unsigned long outstanding_tasks;
 166         unsigned long outstanding_reqs;
 167
 168         u32 capabilities;
 169         int nutrs;
 170         int nutmrs;
 171         u32 ufs_version;
 172         unsigned int irq;
 173
 174         struct uic_command active_uic_cmd;
 175         wait_queue_head_t ufshcd_tm_wait_queue;
 176         unsigned long tm_condition;
 177
 178         u32 ufshcd_state;
 179         u32 int_enable_mask;
 180
 181         /* Work Queues */
 182         struct work_struct uic_workq;
 183         struct work_struct feh_workq;
 184
 185         /* HBA Errors */
 186         u32 errors;
 187 };
 188
 189 int ufshcd_init(struct device *, struct ufs_hba ** , void __iomem * ,
 190                         unsigned int);
 191 void ufshcd_remove(struct ufs_hba *);
 192
 193 /**
 194  * ufshcd_hba_stop - Send controller to reset state
 195  * @hba: per adapter instance
 196  */
 197 static inline void ufshcd_hba_stop(struct ufs_hba *hba)
 198 {
 199         writel(CONTROLLER_DISABLE, (hba->mmio_base + REG_CONTROLLER_ENABLE));
 200 }
 201
 202 #endif /* End of Header */