mirror of
https://github.com/kanjitalk755/macemu.git
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234 lines
5.4 KiB
C++
234 lines
5.4 KiB
C++
/*
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* scsi_beos.cpp - SCSI Manager, BeOS specific stuff
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*
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* Basilisk II (C) 1997-2008 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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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <device/scsi.h>
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#include <drivers/CAM.h>
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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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#define DEBUG 0
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#include "debug.h"
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// Global variables
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static raw_device_command rdc;
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static int fds[8*8]; // fd's for 8 units and 8 LUNs each
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static int fd; // Active fd (selected target)
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static uint32 buffer_size; // Size of data buffer
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static uint8 *buffer = NULL; // Pointer to data buffer
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static uint8 sense_data[256]; // Buffer for autosense data
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/*
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* Initialization
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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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// Allocate buffer
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buffer = (uint8 *)malloc(buffer_size = 0x10000);
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// Open scsi_raw driver for all 8 units (and all 8 LUNs)
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char dev_name[256];
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for (id=0; id<8; id++) {
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for (lun=0; lun<8; lun++)
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fds[id*8+lun] = -1;
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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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int bus, unit;
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if (sscanf(str, "%d/%d", &bus, &unit) == 2) {
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for (lun=0; lun<8; lun++) {
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sprintf(dev_name, "/dev/bus/scsi/%d/%d/%d/raw", bus, unit, lun);
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D(bug("SCSI %d: Opening %s\n", id, dev_name));
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fds[id*8+lun] = open(dev_name, O_RDWR);
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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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// Init rdc
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memset(&rdc, 0, sizeof(rdc));
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rdc.data = buffer;
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rdc.sense_data = sense_data;
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}
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/*
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* Deinitialization
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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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int fd = fds[i*8+j];
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if (fd > 0)
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close(fd);
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}
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// Free buffer
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if (buffer) {
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free(buffer);
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buffer = NULL;
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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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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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uint8 *new_buffer = (uint8 *)malloc(size);
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if (new_buffer == NULL)
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return false;
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free(buffer);
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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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* Set SCSI command to be sent by scsi_send_cmd()
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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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rdc.command_length = cmd_length;
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memcpy(rdc.command, cmd, cmd_length);
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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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bool scsi_is_target_present(int id)
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{
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return fds[id * 8] > 0;
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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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bool scsi_set_target(int id, int lun)
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{
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int new_fd = fds[id * 8 + lun];
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if (new_fd < 0)
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return false;
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if (new_fd != fd)
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rdc.cam_status &= ~CAM_AUTOSNS_VALID; // Clear sense data when selecting new target
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fd = new_fd;
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return true;
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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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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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// 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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// Request Sense and autosense data valid?
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status_t res = B_NO_ERROR;
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if (rdc.command[0] == 0x03 && (rdc.cam_status & CAM_AUTOSNS_VALID)) {
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// Yes, fake command
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D(bug(" autosense\n"));
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memcpy(buffer, sense_data, 256 - rdc.sense_data_length);
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rdc.scsi_status = 0;
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rdc.cam_status = CAM_REQ_CMP;
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} else {
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// No, send regular command
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D(bug(" sending command, length %d\n", data_length));
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rdc.flags = (reading ? B_RAW_DEVICE_DATA_IN : 0) | B_RAW_DEVICE_REPORT_RESIDUAL | B_RAW_DEVICE_SHORT_READ_VALID;
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rdc.data_length = data_length;
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rdc.sense_data_length = 256;
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rdc.scsi_status = 0;
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rdc.cam_status = CAM_REQ_CMP;
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rdc.timeout = timeout * 16667;
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res = ioctl(fd, B_RAW_DEVICE_COMMAND, &rdc, sizeof(rdc));
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D(bug(" command sent, res %08x, status %d, cam_status %02x\n", res, rdc.scsi_status, rdc.cam_status));
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*stat = rdc.scsi_status;
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}
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// Process S/G table when reading
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if (reading && rdc.cam_status == CAM_REQ_CMP) {
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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 ? false : true;
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}
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