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/* |
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* scsi_amiga.cpp - SCSI Manager, Amiga specific stuff |
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* |
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* Basilisk II (C) 1997-2001 Christian Bauer |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (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, MA 02111-1307 USA |
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*/ |
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|
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#include <exec/types.h> |
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#include <exec/memory.h> |
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#include <devices/trackdisk.h> |
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#include <devices/scsidisk.h> |
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#include <proto/exec.h> |
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|
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#include "sysdeps.h" |
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#include "main.h" |
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#include "prefs.h" |
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#include "user_strings.h" |
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#include "scsi.h" |
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|
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#define DEBUG 0 |
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#include "debug.h" |
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|
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|
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// Global variables |
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static struct SCSICmd scsi; |
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|
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static IOStdReq *ios[8*8]; // IORequests for 8 units and 8 LUNs each |
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static IOStdReq *io; // Active IORequest (selected target) |
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|
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static struct MsgPort *the_port = NULL; // Message port for device communication |
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|
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static ULONG buffer_size; // Size of data buffer |
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static UBYTE *buffer = NULL; // Pointer to data buffer |
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static ULONG buffer_memf; // Buffer memory flags |
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|
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static UBYTE cmd_buffer[12]; // Buffer for SCSI command |
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|
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const int SENSE_LENGTH = 256; |
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static UBYTE *sense_buffer = NULL; // Buffer for autosense data |
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|
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|
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/* |
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* Initialization |
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*/ |
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|
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void SCSIInit(void) |
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{ |
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int id, lun; |
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|
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int memtype = PrefsFindInt32("scsimemtype"); |
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switch (memtype) { |
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case 1: |
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buffer_memf = MEMF_24BITDMA | MEMF_PUBLIC; |
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break; |
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case 2: |
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buffer_memf = MEMF_ANY | MEMF_PUBLIC; |
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break; |
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default: |
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buffer_memf = MEMF_CHIP | MEMF_PUBLIC; |
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break; |
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} |
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|
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// Create port and buffers |
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the_port = CreateMsgPort(); |
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buffer = (UBYTE *)AllocMem(buffer_size = 0x10000, buffer_memf); |
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sense_buffer = (UBYTE *)AllocMem(SENSE_LENGTH, MEMF_CHIP | MEMF_PUBLIC); |
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if (the_port == NULL || buffer == NULL || sense_buffer == NULL) { |
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ErrorAlert(STR_NO_MEM_ERR); |
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QuitEmulator(); |
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} |
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|
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// Create and open IORequests for all 8 units (and all 8 LUNs) |
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for (id=0; id<8; id++) { |
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for (lun=0; lun<8; lun++) |
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ios[id*8+lun] = NULL; |
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char prefs_name[16]; |
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sprintf(prefs_name, "scsi%d", id); |
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const char *str = PrefsFindString(prefs_name); |
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if (str) { |
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char dev_name[256]; |
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ULONG dev_unit = 0; |
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if (sscanf(str, "%[^/]/%ld", dev_name, &dev_unit) == 2) { |
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for (lun=0; lun<8; lun++) { |
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struct IOStdReq *io = (struct IOStdReq *)CreateIORequest(the_port, sizeof(struct IOStdReq)); |
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if (io == NULL) |
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continue; |
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if (OpenDevice((UBYTE *)dev_name, dev_unit + lun * 10, (struct IORequest *)io, 0)) { |
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DeleteIORequest(io); |
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continue; |
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} |
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io->io_Data = &scsi; |
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io->io_Length = sizeof(scsi); |
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io->io_Command = HD_SCSICMD; |
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ios[id*8+lun] = io; |
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} |
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} |
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} |
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} |
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|
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// Reset SCSI bus |
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SCSIReset(); |
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|
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// Init SCSICmd |
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memset(&scsi, 0, sizeof(scsi)); |
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scsi.scsi_Command = cmd_buffer; |
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scsi.scsi_SenseData = sense_buffer; |
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scsi.scsi_SenseLength = SENSE_LENGTH; |
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} |
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|
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|
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/* |
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* Deinitialization |
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*/ |
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|
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void SCSIExit(void) |
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{ |
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// Close all devices |
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for (int i=0; i<8; i++) |
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for (int j=0; j<8; j++) { |
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struct IOStdReq *io = ios[i*8+j]; |
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if (io) { |
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CloseDevice((struct IORequest *)io); |
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DeleteIORequest(io); |
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} |
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} |
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|
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// Delete port and buffers |
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if (the_port) |
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DeleteMsgPort(the_port); |
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if (buffer) |
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FreeMem(buffer, buffer_size); |
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if (sense_buffer) |
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FreeMem(sense_buffer, SENSE_LENGTH); |
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} |
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|
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|
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/* |
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* Check if requested data size fits into buffer, allocate new buffer if needed |
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*/ |
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|
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static bool try_buffer(int size) |
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{ |
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if (size <= buffer_size) |
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return true; |
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|
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UBYTE *new_buffer = (UBYTE *)AllocMem(size, buffer_memf); |
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if (new_buffer == NULL) |
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return false; |
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FreeMem(buffer, buffer_size); |
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buffer = new_buffer; |
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buffer_size = size; |
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return true; |
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} |
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|
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|
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/* |
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* Set SCSI command to be sent by scsi_send_cmd() |
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*/ |
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|
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void scsi_set_cmd(int cmd_length, uint8 *cmd) |
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{ |
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scsi.scsi_CmdLength = cmd_length; |
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memcpy(cmd_buffer, cmd, cmd_length); |
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} |
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|
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|
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/* |
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* Check for presence of SCSI target |
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*/ |
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|
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bool scsi_is_target_present(int id) |
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{ |
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return ios[id * 8] != NULL; |
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} |
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|
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|
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/* |
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* Set SCSI target (returns false on error) |
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*/ |
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|
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bool scsi_set_target(int id, int lun) |
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{ |
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struct IOStdReq *new_io = ios[id * 8 + lun]; |
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if (new_io == NULL) |
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return false; |
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if (new_io != io) |
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scsi.scsi_SenseActual = 0; // Clear sense data when selecting new target |
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io = new_io; |
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return true; |
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} |
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|
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|
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/* |
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* Send SCSI command to active target (scsi_set_command() must have been called), |
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* read/write data according to S/G table (returns false on error); timeout is in 1/60 sec |
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*/ |
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|
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bool scsi_send_cmd(size_t data_length, bool reading, int sg_size, uint8 **sg_ptr, uint32 *sg_len, uint16 *stat, uint32 timeout) |
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{ |
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// Check if buffer is large enough, allocate new buffer if needed |
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if (!try_buffer(data_length)) { |
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char str[256]; |
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sprintf(str, GetString(STR_SCSI_BUFFER_ERR), data_length); |
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ErrorAlert(str); |
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return false; |
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} |
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|
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// Process S/G table when writing |
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if (!reading) { |
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D(bug(" writing to buffer\n")); |
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uint8 *buffer_ptr = buffer; |
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for (int i=0; i<sg_size; i++) { |
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uint32 len = sg_len[i]; |
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D(bug(" %d bytes from %08lx\n", len, sg_ptr[i])); |
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memcpy(buffer_ptr, sg_ptr[i], len); |
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buffer_ptr += len; |
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} |
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} |
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|
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// Request Sense and autosense data valid? |
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BYTE res = 0; |
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if (cmd_buffer[0] == 0x03 && scsi.scsi_SenseActual) { |
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|
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// Yes, fake command |
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D(bug(" autosense\n")); |
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memcpy(buffer, sense_buffer, scsi.scsi_SenseActual); |
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scsi.scsi_Status = 0; |
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|
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} else { |
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|
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// No, send regular command |
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D(bug(" sending command, length %ld\n", data_length)); |
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scsi.scsi_Data = (UWORD *)buffer; |
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scsi.scsi_Length = data_length; |
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scsi.scsi_Actual = 0; |
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scsi.scsi_Flags = (reading ? SCSIF_READ : SCSIF_WRITE) | SCSIF_AUTOSENSE; |
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scsi.scsi_SenseActual = 0; |
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scsi.scsi_Status = 0; |
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res = DoIO((struct IORequest *)io); |
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D(bug(" command sent, res %d, status %d\n", res, scsi.scsi_Status)); |
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*stat = scsi.scsi_Status; |
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} |
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|
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// Process S/G table when reading |
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if (reading && res == 0) { |
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D(bug(" reading from buffer\n")); |
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uint8 *buffer_ptr = buffer; |
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for (int i=0; i<sg_size; i++) { |
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uint32 len = sg_len[i]; |
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D(bug(" %d bytes to %08lx\n", len, sg_ptr[i])); |
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memcpy(sg_ptr[i], buffer_ptr, len); |
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buffer_ptr += len; |
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} |
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} |
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return res == 0; |
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} |
