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In the structure returned by the ATA identify device command, there are two fields which describe the device capacity. One is a 32 bit data type which reports the number of sectors as a 28 bit LBA, and the other is a 64 bit data type which is for a 48 bit LBA. If the device doesn't support 48 bit LBAs, the small value is the only value with the correct size. If it supports more, if the number of sectors is small enough to fit into 28 bits, both fields reflect the correct value. If it's too large, the smaller field has 28 bits of 1s, 0xfffffff, and the other field has the correct value. The AHCI driver is implemented by attaching to the generic SCSI code and translating on the fly between SCSI binary data structures and AHCI data structures. It responds to requests to execute specific SCSI commands by executing the equivalent AHCI commands and then crafting a response which matches what a SCSI disk would send. The AHCI driver now considers both fields and chooses the correct one when implementing both the SCSI READ CAPACITY (10) and READ CAPACITY (16) commands. Signed-off-by: Gabe Black <gabeblack@chromium.org> Signed-off-by: Simon Glass <sjg@chromium.org>
216 lines
7.2 KiB
C
216 lines
7.2 KiB
C
/*
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* (C) Copyright 2001
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* Denis Peter, MPL AG Switzerland
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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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 as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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*/
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#ifndef _SCSI_H
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#define _SCSI_H
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typedef struct SCSI_cmd_block{
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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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}ccb;
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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_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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* decleration of functions which have to reside in the LowLevel Part Driver
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*/
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void scsi_print_error(ccb *pccb);
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int scsi_exec(ccb *pccb);
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void scsi_bus_reset(void);
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void scsi_low_level_init(int busdevfunc);
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/***************************************************************************
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* functions residing inside cmd_scsi.c
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*/
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void scsi_init(void);
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void scsi_scan(int mode);
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/** @return the number of scsi disks */
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int scsi_get_disk_count(void);
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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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#ifndef TRUE
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#define TRUE 1
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#endif
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#ifndef FALSE
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#define FALSE 0
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#endif
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#endif /* _SCSI_H */
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