src/AmigaOS/scsi_amiga.cpp

/*
 *  scsi_amiga.cpp - SCSI Manager, Amiga specific stuff
 *
 *  Basilisk II (C) 1997-1999 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 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;

        // Create port and buffers
        the_port = CreateMsgPort();
        buffer = (UBYTE *)AllocMem(buffer_size = 0x10000, MEMF_CHIP | MEMF_PUBLIC);
        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, MEMF_CHIP | MEMF_PUBLIC);
        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 (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;
}
Revision:	1.1
Committed:	1999-10-03T14:16:25Z (25 years, 1 month ago) by cebix
Branch:	MAIN
Branch point for:	cebix
Log Message:	Initial revision
#	Content
1	/*
2	* scsi_amiga.cpp - SCSI Manager, Amiga specific stuff
3	*
4	* Basilisk II (C) 1997-1999 Christian Bauer
5	*
6	* This program is free software; you can redistribute it and/or modify
7	* it under the terms of the GNU General Public License as published by
8	* the Free Software Foundation; either version 2 of the License, or
9	* (at your option) any later version.
10	*
11	* This program is distributed in the hope that it will be useful,
12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14	* GNU General Public License for more details.
15	*
16	* You should have received a copy of the GNU General Public License
17	* along with this program; if not, write to the Free Software
18	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19	*/
20
21	#include <exec/types.h>
22	#include <exec/memory.h>
23	#include <devices/trackdisk.h>
24	#include <devices/scsidisk.h>
25	#include <proto/exec.h>
26
27	#include "sysdeps.h"
28	#include "main.h"
29	#include "prefs.h"
30	#include "user_strings.h"
31	#include "scsi.h"
32
33	#define DEBUG 0
34	#include "debug.h"
35
36
37	// Global variables
38	static struct SCSICmd scsi;
39
40	static IOStdReq ios[88]; // IORequests for 8 units and 8 LUNs each
41	static IOStdReq *io; // Active IORequest (selected target)
42
43	static struct MsgPort *the_port = NULL; // Message port for device communication
44
45	static ULONG buffer_size; // Size of data buffer
46	static UBYTE *buffer = NULL; // Pointer to data buffer
47
48	static UBYTE cmd_buffer[12]; // Buffer for SCSI command
49
50	const int SENSE_LENGTH = 256;
51	static UBYTE *sense_buffer = NULL; // Buffer for autosense data
52
53
54	/*
55	* Initialization
56	*/
57
58	void SCSIInit(void)
59	{
60	int id, lun;
61
62	// Create port and buffers
63	the_port = CreateMsgPort();
64	buffer = (UBYTE *)AllocMem(buffer_size = 0x10000, MEMF_CHIP \| MEMF_PUBLIC);
65	sense_buffer = (UBYTE *)AllocMem(SENSE_LENGTH, MEMF_CHIP \| MEMF_PUBLIC);
66	if (the_port == NULL \|\| buffer == NULL \|\| sense_buffer == NULL) {
67	ErrorAlert(GetString(STR_NO_MEM_ERR));
68	QuitEmulator();
69	}
70
71	// Create and open IORequests for all 8 units (and all 8 LUNs)
72	for (id=0; id<8; id++) {
73	for (lun=0; lun<8; lun++)
74	ios[id*8+lun] = NULL;
75	char prefs_name[16];
76	sprintf(prefs_name, "scsi%d", id);
77	const char *str = PrefsFindString(prefs_name);
78	if (str) {
79	char dev_name[256];
80	ULONG dev_unit = 0;
81	if (sscanf(str, "%[^/]/%ld", dev_name, &dev_unit) == 2) {
82	for (lun=0; lun<8; lun++) {
83	struct IOStdReq io = (struct IOStdReq )CreateIORequest(the_port, sizeof(struct IOStdReq));
84	if (io == NULL)
85	continue;
86	if (OpenDevice((UBYTE )dev_name, dev_unit + lun 10, (struct IORequest *)io, 0)) {
87	DeleteIORequest(io);
88	continue;
89	}
90	io->io_Data = &scsi;
91	io->io_Length = sizeof(scsi);
92	io->io_Command = HD_SCSICMD;
93	ios[id*8+lun] = io;
94	}
95	}
96	}
97	}
98
99	// Reset SCSI bus
100	SCSIReset();
101
102	// Init SCSICmd
103	memset(&scsi, 0, sizeof(scsi));
104	scsi.scsi_Command = cmd_buffer;
105	scsi.scsi_SenseData = sense_buffer;
106	scsi.scsi_SenseLength = SENSE_LENGTH;
107	}
108
109
110	/*
111	* Deinitialization
112	*/
113
114	void SCSIExit(void)
115	{
116	// Close all devices
117	for (int i=0; i<8; i++)
118	for (int j=0; j<8; j++) {
119	struct IOStdReq io = ios[i8+j];
120	if (io) {
121	CloseDevice((struct IORequest *)io);
122	DeleteIORequest(io);
123	}
124	}
125
126	// Delete port and buffers
127	if (the_port)
128	DeleteMsgPort(the_port);
129	if (buffer)
130	FreeMem(buffer, buffer_size);
131	if (sense_buffer)
132	FreeMem(sense_buffer, SENSE_LENGTH);
133	}
134
135
136	/*
137	* Check if requested data size fits into buffer, allocate new buffer if needed
138	*/
139
140	static bool try_buffer(int size)
141	{
142	if (size <= buffer_size)
143	return true;
144
145	UBYTE new_buffer = (UBYTE )AllocMem(size, MEMF_CHIP \| MEMF_PUBLIC);
146	if (new_buffer == NULL)
147	return false;
148	FreeMem(buffer, buffer_size);
149	buffer = new_buffer;
150	buffer_size = size;
151	return true;
152	}
153
154
155	/*
156	* Set SCSI command to be sent by scsi_send_cmd()
157	*/
158
159	void scsi_set_cmd(int cmd_length, uint8 *cmd)
160	{
161	scsi.scsi_CmdLength = cmd_length;
162	memcpy(cmd_buffer, cmd, cmd_length);
163	}
164
165
166	/*
167	* Check for presence of SCSI target
168	*/
169
170	bool scsi_is_target_present(int id)
171	{
172	return ios[id * 8] != NULL;
173	}
174
175
176	/*
177	* Set SCSI target (returns false on error)
178	*/
179
180	bool scsi_set_target(int id, int lun)
181	{
182	struct IOStdReq new_io = ios[id 8 + lun];
183	if (new_io == NULL)
184	return false;
185	if (new_io != io)
186	scsi.scsi_SenseActual = 0; // Clear sense data when selecting new target
187	io = new_io;
188	return true;
189	}
190
191
192	/*
193	* Send SCSI command to active target (scsi_set_command() must have been called),
194	* read/write data according to S/G table (returns false on error); timeout is in 1/60 sec
195	*/
196
197	bool scsi_send_cmd(size_t data_length, bool reading, int sg_size, uint8 *sg_ptr, uint32 sg_len, uint16 *stat, uint32 timeout)
198	{
199	// Check if buffer is large enough, allocate new buffer if needed
200	if (!try_buffer(data_length)) {
201	char str[256];
202	sprintf(str, GetString(STR_SCSI_BUFFER_ERR), data_length);
203	ErrorAlert(str);
204	return false;
205	}
206
207	// Process S/G table when writing
208	if (!reading) {
209	D(bug(" writing to buffer\n"));
210	uint8 *buffer_ptr = buffer;
211	for (int i=0; i<sg_size; i++) {
212	uint32 len = sg_len[i];
213	D(bug(" %d bytes from %08lx\n", len, sg_ptr[i]));
214	memcpy(buffer_ptr, sg_ptr[i], len);
215	buffer_ptr += len;
216	}
217	}
218
219	// Request Sense and autosense data valid?
220	BYTE res = 0;
221	if (cmd_buffer[0] == 0x03 && scsi.scsi_SenseActual) {
222
223	// Yes, fake command
224	D(bug(" autosense\n"));
225	memcpy(buffer, sense_buffer, scsi.scsi_SenseActual);
226	scsi.scsi_Status = 0;
227
228	} else {
229
230	// No, send regular command
231	D(bug(" sending command, length %ld\n", data_length));
232	scsi.scsi_Data = (UWORD *)buffer;
233	scsi.scsi_Length = data_length;
234	scsi.scsi_Actual = 0;
235	scsi.scsi_Flags = (reading ? SCSIF_READ : SCSIF_WRITE) \| SCSIF_AUTOSENSE;
236	scsi.scsi_SenseActual = 0;
237	scsi.scsi_Status = 0;
238	res = DoIO((struct IORequest *)io);
239	D(bug(" command sent, res %d, status %d\n", res, scsi.scsi_Status));
240	*stat = scsi.scsi_Status;
241	}
242
243	// Process S/G table when reading
244	if (res == 0) {
245	D(bug(" reading from buffer\n"));
246	uint8 *buffer_ptr = buffer;
247	for (int i=0; i<sg_size; i++) {
248	uint32 len = sg_len[i];
249	D(bug(" %d bytes to %08lx\n", len, sg_ptr[i]));
250	memcpy(sg_ptr[i], buffer_ptr, len);
251	buffer_ptr += len;
252	}
253	}
254	return res == 0;
255	}