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8fbac8e23e
Some SCSI devices like UFS use DMA for executing scsi commands and hence need to know the direction of transfer of the dma. Add a dma_dir element to the command structure to facilitate this. Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
250 lines
7.6 KiB
C
250 lines
7.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* (C) Copyright 2001
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* Denis Peter, MPL AG Switzerland
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*/
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#ifndef _SCSI_H
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#define _SCSI_H
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#include <linux/dma-direction.h>
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struct scsi_cmd {
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unsigned char cmd[16]; /* command */
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/* for request sense */
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unsigned char sense_buf[64]
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__attribute__((aligned(ARCH_DMA_MINALIGN)));
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unsigned char status; /* SCSI Status */
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unsigned char target; /* Target ID */
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unsigned char lun; /* Target LUN */
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unsigned char cmdlen; /* command len */
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unsigned long datalen; /* Total data length */
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unsigned char * pdata; /* pointer to data */
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unsigned char msgout[12]; /* Messge out buffer (NOT USED) */
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unsigned char msgin[12]; /* Message in buffer */
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unsigned char sensecmdlen; /* Sense command len */
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unsigned long sensedatalen; /* Sense data len */
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unsigned char sensecmd[6]; /* Sense command */
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unsigned long contr_stat; /* Controller Status */
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unsigned long trans_bytes; /* tranfered bytes */
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unsigned int priv;
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enum dma_data_direction dma_dir;
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};
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/*-----------------------------------------------------------
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**
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** SCSI constants.
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**
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**-----------------------------------------------------------
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*/
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/*
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** Messages
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*/
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#define M_COMPLETE (0x00)
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#define M_EXTENDED (0x01)
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#define M_SAVE_DP (0x02)
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#define M_RESTORE_DP (0x03)
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#define M_DISCONNECT (0x04)
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#define M_ID_ERROR (0x05)
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#define M_ABORT (0x06)
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#define M_REJECT (0x07)
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#define M_NOOP (0x08)
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#define M_PARITY (0x09)
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#define M_LCOMPLETE (0x0a)
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#define M_FCOMPLETE (0x0b)
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#define M_RESET (0x0c)
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#define M_ABORT_TAG (0x0d)
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#define M_CLEAR_QUEUE (0x0e)
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#define M_INIT_REC (0x0f)
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#define M_REL_REC (0x10)
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#define M_TERMINATE (0x11)
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#define M_SIMPLE_TAG (0x20)
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#define M_HEAD_TAG (0x21)
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#define M_ORDERED_TAG (0x22)
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#define M_IGN_RESIDUE (0x23)
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#define M_IDENTIFY (0x80)
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#define M_X_MODIFY_DP (0x00)
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#define M_X_SYNC_REQ (0x01)
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#define M_X_WIDE_REQ (0x03)
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#define M_X_PPR_REQ (0x04)
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/*
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** Status
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*/
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#define S_GOOD (0x00)
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#define S_CHECK_COND (0x02)
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#define S_COND_MET (0x04)
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#define S_BUSY (0x08)
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#define S_INT (0x10)
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#define S_INT_COND_MET (0x14)
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#define S_CONFLICT (0x18)
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#define S_TERMINATED (0x20)
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#define S_QUEUE_FULL (0x28)
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#define S_ILLEGAL (0xff)
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#define S_SENSE (0x80)
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/*
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* Sense_keys
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*/
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#define SENSE_NO_SENSE 0x0
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#define SENSE_RECOVERED_ERROR 0x1
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#define SENSE_NOT_READY 0x2
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#define SENSE_MEDIUM_ERROR 0x3
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#define SENSE_HARDWARE_ERROR 0x4
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#define SENSE_ILLEGAL_REQUEST 0x5
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#define SENSE_UNIT_ATTENTION 0x6
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#define SENSE_DATA_PROTECT 0x7
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#define SENSE_BLANK_CHECK 0x8
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#define SENSE_VENDOR_SPECIFIC 0x9
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#define SENSE_COPY_ABORTED 0xA
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#define SENSE_ABORTED_COMMAND 0xB
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#define SENSE_VOLUME_OVERFLOW 0xD
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#define SENSE_MISCOMPARE 0xE
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#define SCSI_CHANGE_DEF 0x40 /* Change Definition (Optional) */
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#define SCSI_COMPARE 0x39 /* Compare (O) */
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#define SCSI_COPY 0x18 /* Copy (O) */
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#define SCSI_COP_VERIFY 0x3A /* Copy and Verify (O) */
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#define SCSI_INQUIRY 0x12 /* Inquiry (MANDATORY) */
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#define SCSI_LOG_SELECT 0x4C /* Log Select (O) */
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#define SCSI_LOG_SENSE 0x4D /* Log Sense (O) */
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#define SCSI_MODE_SEL6 0x15 /* Mode Select 6-byte (Device Specific) */
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#define SCSI_MODE_SEL10 0x55 /* Mode Select 10-byte (Device Specific) */
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#define SCSI_MODE_SEN6 0x1A /* Mode Sense 6-byte (Device Specific) */
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#define SCSI_MODE_SEN10 0x5A /* Mode Sense 10-byte (Device Specific) */
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#define SCSI_READ_BUFF 0x3C /* Read Buffer (O) */
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#define SCSI_REQ_SENSE 0x03 /* Request Sense (MANDATORY) */
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#define SCSI_SEND_DIAG 0x1D /* Send Diagnostic (O) */
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#define SCSI_TST_U_RDY 0x00 /* Test Unit Ready (MANDATORY) */
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#define SCSI_WRITE_BUFF 0x3B /* Write Buffer (O) */
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/***************************************************************************
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* %%% Commands Unique to Direct Access Devices %%%
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***************************************************************************/
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#define SCSI_COMPARE 0x39 /* Compare (O) */
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#define SCSI_FORMAT 0x04 /* Format Unit (MANDATORY) */
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#define SCSI_LCK_UN_CAC 0x36 /* Lock Unlock Cache (O) */
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#define SCSI_PREFETCH 0x34 /* Prefetch (O) */
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#define SCSI_MED_REMOVL 0x1E /* Prevent/Allow medium Removal (O) */
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#define SCSI_READ6 0x08 /* Read 6-byte (MANDATORY) */
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#define SCSI_READ10 0x28 /* Read 10-byte (MANDATORY) */
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#define SCSI_READ16 0x48
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#define SCSI_RD_CAPAC 0x25 /* Read Capacity (MANDATORY) */
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#define SCSI_RD_CAPAC10 SCSI_RD_CAPAC /* Read Capacity (10) */
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#define SCSI_RD_CAPAC16 0x9e /* Read Capacity (16) */
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#define SCSI_RD_DEFECT 0x37 /* Read Defect Data (O) */
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#define SCSI_READ_LONG 0x3E /* Read Long (O) */
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#define SCSI_REASS_BLK 0x07 /* Reassign Blocks (O) */
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#define SCSI_RCV_DIAG 0x1C /* Receive Diagnostic Results (O) */
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#define SCSI_RELEASE 0x17 /* Release Unit (MANDATORY) */
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#define SCSI_REZERO 0x01 /* Rezero Unit (O) */
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#define SCSI_SRCH_DAT_E 0x31 /* Search Data Equal (O) */
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#define SCSI_SRCH_DAT_H 0x30 /* Search Data High (O) */
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#define SCSI_SRCH_DAT_L 0x32 /* Search Data Low (O) */
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#define SCSI_SEEK6 0x0B /* Seek 6-Byte (O) */
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#define SCSI_SEEK10 0x2B /* Seek 10-Byte (O) */
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#define SCSI_SEND_DIAG 0x1D /* Send Diagnostics (MANDATORY) */
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#define SCSI_SET_LIMIT 0x33 /* Set Limits (O) */
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#define SCSI_START_STP 0x1B /* Start/Stop Unit (O) */
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#define SCSI_SYNC_CACHE 0x35 /* Synchronize Cache (O) */
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#define SCSI_VERIFY 0x2F /* Verify (O) */
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#define SCSI_WRITE6 0x0A /* Write 6-Byte (MANDATORY) */
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#define SCSI_WRITE10 0x2A /* Write 10-Byte (MANDATORY) */
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#define SCSI_WRT_VERIFY 0x2E /* Write and Verify (O) */
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#define SCSI_WRITE_LONG 0x3F /* Write Long (O) */
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#define SCSI_WRITE_SAME 0x41 /* Write Same (O) */
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/**
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* struct scsi_platdata - stores information about SCSI controller
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*
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* @base: Controller base address
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* @max_lun: Maximum number of logical units
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* @max_id: Maximum number of target ids
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* @max_bytes_per_req: Maximum number of bytes per read/write request
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*/
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struct scsi_platdata {
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unsigned long base;
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unsigned long max_lun;
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unsigned long max_id;
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unsigned long max_bytes_per_req;
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};
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/* Operations for SCSI */
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struct scsi_ops {
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/**
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* exec() - execute a command
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*
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* @dev: SCSI bus
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* @cmd: Command to execute
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* @return 0 if OK, -ve on error
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*/
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int (*exec)(struct udevice *dev, struct scsi_cmd *cmd);
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/**
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* bus_reset() - reset the bus
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*
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* @dev: SCSI bus to reset
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* @return 0 if OK, -ve on error
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*/
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int (*bus_reset)(struct udevice *dev);
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};
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#define scsi_get_ops(dev) ((struct scsi_ops *)(dev)->driver->ops)
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extern struct scsi_ops scsi_ops;
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/**
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* scsi_exec() - execute a command
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*
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* @dev: SCSI bus
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* @cmd: Command to execute
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* @return 0 if OK, -ve on error
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*/
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int scsi_exec(struct udevice *dev, struct scsi_cmd *cmd);
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/**
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* scsi_bus_reset() - reset the bus
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*
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* @dev: SCSI bus to reset
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* @return 0 if OK, -ve on error
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*/
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int scsi_bus_reset(struct udevice *dev);
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/**
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* scsi_scan() - Scan all SCSI controllers for available devices
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*
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* @vebose: true to show information about each device found
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*/
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int scsi_scan(bool verbose);
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/**
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* scsi_scan_dev() - scan a SCSI bus and create devices
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*
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* @dev: SCSI bus
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* @verbose: true to show information about each device found
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*/
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int scsi_scan_dev(struct udevice *dev, bool verbose);
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#ifndef CONFIG_DM_SCSI
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void scsi_low_level_init(int busdevfunc);
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void scsi_init(void);
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#endif
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#define SCSI_IDENTIFY 0xC0 /* not used */
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/* Hardware errors */
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#define SCSI_SEL_TIME_OUT 0x00000101 /* Selection time out */
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#define SCSI_HNS_TIME_OUT 0x00000102 /* Handshake */
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#define SCSI_MA_TIME_OUT 0x00000103 /* Phase error */
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#define SCSI_UNEXP_DIS 0x00000104 /* unexpected disconnect */
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#define SCSI_INT_STATE 0x00010000 /* unknown Interrupt number is stored in 16 LSB */
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#endif /* _SCSI_H */
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