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- /*
- * scsi_amiga.cpp - SCSI Manager, Amiga specific stuff
- *
- * Basilisk II (C) 1997-2001 Christian Bauer
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
- #include <exec/types.h>
- #include <exec/memory.h>
- #include <devices/trackdisk.h>
- #include <devices/scsidisk.h>
- #include <proto/exec.h>
-
- #include "sysdeps.h"
- #include "main.h"
- #include "prefs.h"
- #include "user_strings.h"
- #include "scsi.h"
-
- #define DEBUG 0
- #include "debug.h"
-
-
- // Global variables
- static struct SCSICmd scsi;
-
- static IOStdReq *ios[8*8]; // IORequests for 8 units and 8 LUNs each
- static IOStdReq *io; // Active IORequest (selected target)
-
- static struct MsgPort *the_port = NULL; // Message port for device communication
-
- static ULONG buffer_size; // Size of data buffer
- static UBYTE *buffer = NULL; // Pointer to data buffer
- static ULONG buffer_memf; // Buffer memory flags
-
- static UBYTE cmd_buffer[12]; // Buffer for SCSI command
-
- const int SENSE_LENGTH = 256;
- static UBYTE *sense_buffer = NULL; // Buffer for autosense data
-
-
- /*
- * Initialization
- */
-
- void SCSIInit(void)
- {
- int id, lun;
-
- int memtype = PrefsFindInt32("scsimemtype");
- switch (memtype) {
- case 1:
- buffer_memf = MEMF_24BITDMA | MEMF_PUBLIC;
- break;
- case 2:
- buffer_memf = MEMF_ANY | MEMF_PUBLIC;
- break;
- default:
- buffer_memf = MEMF_CHIP | MEMF_PUBLIC;
- break;
- }
-
- // Create port and buffers
- the_port = CreateMsgPort();
- buffer = (UBYTE *)AllocMem(buffer_size = 0x10000, buffer_memf);
- sense_buffer = (UBYTE *)AllocMem(SENSE_LENGTH, MEMF_CHIP | MEMF_PUBLIC);
- if (the_port == NULL || buffer == NULL || sense_buffer == NULL) {
- ErrorAlert(GetString(STR_NO_MEM_ERR));
- QuitEmulator();
- }
-
- // Create and open IORequests for all 8 units (and all 8 LUNs)
- for (id=0; id<8; id++) {
- for (lun=0; lun<8; lun++)
- ios[id*8+lun] = NULL;
- char prefs_name[16];
- sprintf(prefs_name, "scsi%d", id);
- const char *str = PrefsFindString(prefs_name);
- if (str) {
- char dev_name[256];
- ULONG dev_unit = 0;
- if (sscanf(str, "%[^/]/%ld", dev_name, &dev_unit) == 2) {
- for (lun=0; lun<8; lun++) {
- struct IOStdReq *io = (struct IOStdReq *)CreateIORequest(the_port, sizeof(struct IOStdReq));
- if (io == NULL)
- continue;
- if (OpenDevice((UBYTE *)dev_name, dev_unit + lun * 10, (struct IORequest *)io, 0)) {
- DeleteIORequest(io);
- continue;
- }
- io->io_Data = &scsi;
- io->io_Length = sizeof(scsi);
- io->io_Command = HD_SCSICMD;
- ios[id*8+lun] = io;
- }
- }
- }
- }
-
- // Reset SCSI bus
- SCSIReset();
-
- // Init SCSICmd
- memset(&scsi, 0, sizeof(scsi));
- scsi.scsi_Command = cmd_buffer;
- scsi.scsi_SenseData = sense_buffer;
- scsi.scsi_SenseLength = SENSE_LENGTH;
- }
-
-
- /*
- * Deinitialization
- */
-
- void SCSIExit(void)
- {
- // Close all devices
- for (int i=0; i<8; i++)
- for (int j=0; j<8; j++) {
- struct IOStdReq *io = ios[i*8+j];
- if (io) {
- CloseDevice((struct IORequest *)io);
- DeleteIORequest(io);
- }
- }
-
- // Delete port and buffers
- if (the_port)
- DeleteMsgPort(the_port);
- if (buffer)
- FreeMem(buffer, buffer_size);
- if (sense_buffer)
- FreeMem(sense_buffer, SENSE_LENGTH);
- }
-
-
- /*
- * Check if requested data size fits into buffer, allocate new buffer if needed
- */
-
- static bool try_buffer(int size)
- {
- if (size <= buffer_size)
- return true;
-
- UBYTE *new_buffer = (UBYTE *)AllocMem(size, buffer_memf);
- if (new_buffer == NULL)
- return false;
- FreeMem(buffer, buffer_size);
- buffer = new_buffer;
- buffer_size = size;
- return true;
- }
-
-
- /*
- * Set SCSI command to be sent by scsi_send_cmd()
- */
-
- void scsi_set_cmd(int cmd_length, uint8 *cmd)
- {
- scsi.scsi_CmdLength = cmd_length;
- memcpy(cmd_buffer, cmd, cmd_length);
- }
-
-
- /*
- * Check for presence of SCSI target
- */
-
- bool scsi_is_target_present(int id)
- {
- return ios[id * 8] != NULL;
- }
-
-
- /*
- * Set SCSI target (returns false on error)
- */
-
- bool scsi_set_target(int id, int lun)
- {
- struct IOStdReq *new_io = ios[id * 8 + lun];
- if (new_io == NULL)
- return false;
- if (new_io != io)
- scsi.scsi_SenseActual = 0; // Clear sense data when selecting new target
- io = new_io;
- return true;
- }
-
-
- /*
- * Send SCSI command to active target (scsi_set_command() must have been called),
- * read/write data according to S/G table (returns false on error); timeout is in 1/60 sec
- */
-
- bool scsi_send_cmd(size_t data_length, bool reading, int sg_size, uint8 **sg_ptr, uint32 *sg_len, uint16 *stat, uint32 timeout)
- {
- // Check if buffer is large enough, allocate new buffer if needed
- if (!try_buffer(data_length)) {
- char str[256];
- sprintf(str, GetString(STR_SCSI_BUFFER_ERR), data_length);
- ErrorAlert(str);
- return false;
- }
-
- // Process S/G table when writing
- if (!reading) {
- D(bug(" writing to buffer\n"));
- uint8 *buffer_ptr = buffer;
- for (int i=0; i<sg_size; i++) {
- uint32 len = sg_len[i];
- D(bug(" %d bytes from %08lx\n", len, sg_ptr[i]));
- memcpy(buffer_ptr, sg_ptr[i], len);
- buffer_ptr += len;
- }
- }
-
- // Request Sense and autosense data valid?
- BYTE res = 0;
- if (cmd_buffer[0] == 0x03 && scsi.scsi_SenseActual) {
-
- // Yes, fake command
- D(bug(" autosense\n"));
- memcpy(buffer, sense_buffer, scsi.scsi_SenseActual);
- scsi.scsi_Status = 0;
-
- } else {
-
- // No, send regular command
- D(bug(" sending command, length %ld\n", data_length));
- scsi.scsi_Data = (UWORD *)buffer;
- scsi.scsi_Length = data_length;
- scsi.scsi_Actual = 0;
- scsi.scsi_Flags = (reading ? SCSIF_READ : SCSIF_WRITE) | SCSIF_AUTOSENSE;
- scsi.scsi_SenseActual = 0;
- scsi.scsi_Status = 0;
- res = DoIO((struct IORequest *)io);
- D(bug(" command sent, res %d, status %d\n", res, scsi.scsi_Status));
- *stat = scsi.scsi_Status;
- }
-
- // Process S/G table when reading
- if (reading && res == 0) {
- D(bug(" reading from buffer\n"));
- uint8 *buffer_ptr = buffer;
- for (int i=0; i<sg_size; i++) {
- uint32 len = sg_len[i];
- D(bug(" %d bytes to %08lx\n", len, sg_ptr[i]));
- memcpy(sg_ptr[i], buffer_ptr, len);
- buffer_ptr += len;
- }
- }
- return res == 0;
- }
-