1 // Support for several common scsi like command data block requests
3 // Copyright (C) 2010 Kevin O'Connor <kevin@koconnor.net>
4 // Copyright (C) 2002 MandrakeSoft S.A.
6 // This file may be distributed under the terms of the GNU LGPLv3 license.
8 #include "biosvar.h" // GET_GLOBAL
9 #include "util.h" // htonl
10 #include "disk.h" // struct disk_op_s
11 #include "blockcmd.h" // struct cdb_request_sense
12 #include "ata.h" // atapi_cmd_data
13 #include "ahci.h" // atapi_cmd_data
14 #include "usb-msc.h" // usb_cmd_data
16 // Route command to low-level handler.
18 cdb_cmd_data(struct disk_op_s *op, void *cdbcmd, u16 blocksize)
20 u8 type = GET_GLOBAL(op->drive_g->type);
23 return atapi_cmd_data(op, cdbcmd, blocksize);
25 return usb_cmd_data(op, cdbcmd, blocksize);
27 return ahci_cmd_data(op, cdbcmd, blocksize);
30 return DISK_RET_EPARAM;
35 scsi_is_ready(struct disk_op_s *op)
37 dprintf(6, "scsi_is_ready (drive=%p)\n", op->drive_g);
39 /* Retry TEST UNIT READY for 5 seconds unless MEDIUM NOT PRESENT is
40 * reported by the device. If the device reports "IN PROGRESS",
41 * 30 seconds is added. */
43 u64 end = calc_future_tsc(5000);
46 dprintf(1, "test unit ready failed\n");
50 int ret = cdb_test_unit_ready(op);
55 struct cdbres_request_sense sense;
56 ret = cdb_get_sense(op, &sense);
62 if (sense.asc == 0x3a) { /* MEDIUM NOT PRESENT */
63 dprintf(1, "Device reports MEDIUM NOT PRESENT\n");
67 if (sense.asc == 0x04 && sense.ascq == 0x01 && !in_progress) {
68 /* IN PROGRESS OF BECOMING READY */
69 printf("Waiting for device to detect medium... ");
70 /* Allow 30 seconds more */
71 end = calc_future_tsc(30000);
78 // Validate drive and find block size and sector count.
80 scsi_init_drive(struct drive_s *drive, const char *s, int *pdt, char **desc)
86 memset(&dop, 0, sizeof(dop));
88 struct cdbres_inquiry data;
89 int ret = cdb_get_inquiry(&dop, &data);
92 char vendor[sizeof(data.vendor)+1], product[sizeof(data.product)+1];
93 char rev[sizeof(data.rev)+1];
94 strtcpy(vendor, data.vendor, sizeof(vendor));
95 nullTrailingSpace(vendor);
96 strtcpy(product, data.product, sizeof(product));
97 nullTrailingSpace(product);
98 strtcpy(rev, data.rev, sizeof(rev));
99 nullTrailingSpace(rev);
100 *pdt = data.pdt & 0x1f;
101 int removable = !!(data.removable & 0x80);
102 dprintf(1, "%s vendor='%s' product='%s' rev='%s' type=%d removable=%d\n"
103 , s, vendor, product, rev, *pdt, removable);
104 drive->removable = removable;
106 if (*pdt == SCSI_TYPE_CDROM) {
107 drive->blksize = CDROM_SECTOR_SIZE;
108 drive->sectors = (u64)-1;
110 *desc = znprintf(MAXDESCSIZE, "DVD/CD [%s Drive %s %s %s]"
111 , s, vendor, product, rev);
115 ret = scsi_is_ready(&dop);
117 dprintf(1, "scsi_is_ready returned %d\n", ret);
121 struct cdbres_read_capacity capdata;
122 ret = cdb_read_capacity(&dop, &capdata);
126 // READ CAPACITY returns the address of the last block.
127 // We do not bother with READ CAPACITY(16) because BIOS does not support
128 // 64-bit LBA anyway.
129 drive->blksize = ntohl(capdata.blksize);
130 drive->sectors = (u64)ntohl(capdata.sectors) + 1;
131 dprintf(1, "%s blksize=%d sectors=%d\n"
132 , s, drive->blksize, (unsigned)drive->sectors);
134 *desc = znprintf(MAXDESCSIZE, "%s Drive %s %s %s"
135 , s, vendor, product, rev);
140 cdb_get_inquiry(struct disk_op_s *op, struct cdbres_inquiry *data)
142 struct cdb_request_sense cmd;
143 memset(&cmd, 0, sizeof(cmd));
144 cmd.command = CDB_CMD_INQUIRY;
145 cmd.length = sizeof(*data);
148 return cdb_cmd_data(op, &cmd, sizeof(*data));
153 cdb_get_sense(struct disk_op_s *op, struct cdbres_request_sense *data)
155 struct cdb_request_sense cmd;
156 memset(&cmd, 0, sizeof(cmd));
157 cmd.command = CDB_CMD_REQUEST_SENSE;
158 cmd.length = sizeof(*data);
161 return cdb_cmd_data(op, &cmd, sizeof(*data));
166 cdb_test_unit_ready(struct disk_op_s *op)
168 struct cdb_request_sense cmd;
169 memset(&cmd, 0, sizeof(cmd));
170 cmd.command = CDB_CMD_TEST_UNIT_READY;
173 return cdb_cmd_data(op, &cmd, 0);
178 cdb_read_capacity(struct disk_op_s *op, struct cdbres_read_capacity *data)
180 struct cdb_read_capacity cmd;
181 memset(&cmd, 0, sizeof(cmd));
182 cmd.command = CDB_CMD_READ_CAPACITY;
185 return cdb_cmd_data(op, &cmd, sizeof(*data));
190 cdb_read(struct disk_op_s *op)
192 struct cdb_rwdata_10 cmd;
193 memset(&cmd, 0, sizeof(cmd));
194 cmd.command = CDB_CMD_READ_10;
195 cmd.lba = htonl(op->lba);
196 cmd.count = htons(op->count);
197 return cdb_cmd_data(op, &cmd, GET_GLOBAL(op->drive_g->blksize));
202 cdb_write(struct disk_op_s *op)
204 struct cdb_rwdata_10 cmd;
205 memset(&cmd, 0, sizeof(cmd));
206 cmd.command = CDB_CMD_WRITE_10;
207 cmd.lba = htonl(op->lba);
208 cmd.count = htons(op->count);
209 return cdb_cmd_data(op, &cmd, GET_GLOBAL(op->drive_g->blksize));