1 // (qemu-emulated) lsi53c895a boot support.
2 //
3 // Copyright (C) 2012 Red Hat Inc.
4 //
5 // Authors:
6 // Gerd Hoffmann <kraxel@redhat.com>
7 //
8 // based on virtio-scsi.c which is written by:
9 // Paolo Bonzini <pbonzini@redhat.com>
10 //
11 // This file may be distributed under the terms of the GNU LGPLv3 license.
12
13 #include "biosvar.h" // GET_GLOBALFLAT
14 #include "block.h" // struct drive_s
15 #include "blockcmd.h" // scsi_drive_setup
16 #include "config.h" // CONFIG_*
17 #include "byteorder.h" // cpu_to_*
18 #include "fw/paravirt.h" // runningOnQEMU
19 #include "malloc.h" // free
20 #include "output.h" // dprintf
21 #include "pcidevice.h" // foreachpci
22 #include "pci_ids.h" // PCI_DEVICE_ID_VIRTIO_BLK
23 #include "pci_regs.h" // PCI_VENDOR_ID
24 #include "stacks.h" // run_thread
25 #include "std/disk.h" // DISK_RET_SUCCESS
26 #include "string.h" // memset
27 #include "util.h" // usleep
28
29 #define LSI_REG_DSTAT 0x0c
30 #define LSI_REG_ISTAT0 0x14
31 #define LSI_REG_DSP0 0x2c
32 #define LSI_REG_DSP1 0x2d
33 #define LSI_REG_DSP2 0x2e
34 #define LSI_REG_DSP3 0x2f
35 #define LSI_REG_SIST0 0x42
36 #define LSI_REG_SIST1 0x43
37
38 #define LSI_ISTAT0_DIP 0x01
39 #define LSI_ISTAT0_SIP 0x02
40 #define LSI_ISTAT0_INTF 0x04
41 #define LSI_ISTAT0_CON 0x08
42 #define LSI_ISTAT0_SEM 0x10
43 #define LSI_ISTAT0_SIGP 0x20
44 #define LSI_ISTAT0_SRST 0x40
45 #define LSI_ISTAT0_ABRT 0x80
46
47 struct lsi_lun_s {
48 struct drive_s drive;
49 struct pci_device *pci;
50 u32 iobase;
51 u8 target;
52 u8 lun;
53 };
54
55 int
lsi_scsi_process_op(struct disk_op_s * op)56 lsi_scsi_process_op(struct disk_op_s *op)
57 {
58 if (!CONFIG_LSI_SCSI)
59 return DISK_RET_EBADTRACK;
60 struct lsi_lun_s *llun_gf =
61 container_of(op->drive_fl, struct lsi_lun_s, drive);
62 u16 target = GET_GLOBALFLAT(llun_gf->target);
63 u16 lun = GET_GLOBALFLAT(llun_gf->lun);
64 u8 cdbcmd[16];
65 int blocksize = scsi_fill_cmd(op, cdbcmd, sizeof(cdbcmd));
66 if (blocksize < 0)
67 return default_process_op(op);
68 u32 iobase = GET_GLOBALFLAT(llun_gf->iobase);
69 u32 dma = ((scsi_is_read(op) ? 0x01000000 : 0x00000000) |
70 (op->count * blocksize));
71 u8 msgout[] = {
72 0x80 | lun, // select lun
73 0x08,
74 };
75 u8 status = 0xff;
76 u8 msgin_tmp[2];
77 u8 msgin = 0xff;
78
79 u32 script[] = {
80 /* select target, send scsi command */
81 0x40000000 | target << 16, // select target
82 0x00000000,
83 0x06000001, // msgout
84 (u32)MAKE_FLATPTR(GET_SEG(SS), &msgout),
85 0x02000010, // scsi command
86 (u32)MAKE_FLATPTR(GET_SEG(SS), cdbcmd),
87
88 /* handle disconnect */
89 0x87820000, // phase == msgin ?
90 0x00000018,
91 0x07000002, // msgin
92 (u32)MAKE_FLATPTR(GET_SEG(SS), &msgin_tmp),
93 0x50000000, // re-select
94 0x00000000,
95 0x07000002, // msgin
96 (u32)MAKE_FLATPTR(GET_SEG(SS), &msgin_tmp),
97
98 /* dma data, get status, raise irq */
99 dma, // dma data
100 (u32)op->buf_fl,
101 0x03000001, // status
102 (u32)MAKE_FLATPTR(GET_SEG(SS), &status),
103 0x07000001, // msgin
104 (u32)MAKE_FLATPTR(GET_SEG(SS), &msgin),
105 0x98080000, // dma irq
106 0x00000000,
107 };
108 u32 dsp = (u32)MAKE_FLATPTR(GET_SEG(SS), &script);
109
110 /* convert to little endian for PCI */
111 convert_to_le32(script, sizeof(script));
112
113 outb(dsp & 0xff, iobase + LSI_REG_DSP0);
114 outb((dsp >> 8) & 0xff, iobase + LSI_REG_DSP1);
115 outb((dsp >> 16) & 0xff, iobase + LSI_REG_DSP2);
116 outb((dsp >> 24) & 0xff, iobase + LSI_REG_DSP3);
117
118 for (;;) {
119 u8 dstat = inb(iobase + LSI_REG_DSTAT);
120 u8 sist0 = inb(iobase + LSI_REG_SIST0);
121 u8 sist1 = inb(iobase + LSI_REG_SIST1);
122 if (sist0 || sist1) {
123 goto fail;
124 }
125 if (dstat & 0x04) {
126 break;
127 }
128 usleep(5);
129 }
130
131 if (msgin == 0 && status == 0) {
132 return DISK_RET_SUCCESS;
133 }
134
135 fail:
136 return DISK_RET_EBADTRACK;
137 }
138
139 static void
lsi_scsi_init_lun(struct lsi_lun_s * llun,struct pci_device * pci,u32 iobase,u8 target,u8 lun)140 lsi_scsi_init_lun(struct lsi_lun_s *llun, struct pci_device *pci, u32 iobase,
141 u8 target, u8 lun)
142 {
143 memset(llun, 0, sizeof(*llun));
144 llun->drive.type = DTYPE_LSI_SCSI;
145 llun->drive.cntl_id = pci->bdf;
146 llun->pci = pci;
147 llun->target = target;
148 llun->lun = lun;
149 llun->iobase = iobase;
150 }
151
152 static int
lsi_scsi_add_lun(u32 lun,struct drive_s * tmpl_drv)153 lsi_scsi_add_lun(u32 lun, struct drive_s *tmpl_drv)
154 {
155 struct lsi_lun_s *tmpl_llun =
156 container_of(tmpl_drv, struct lsi_lun_s, drive);
157 struct lsi_lun_s *llun = malloc_fseg(sizeof(*llun));
158 if (!llun) {
159 warn_noalloc();
160 return -1;
161 }
162 lsi_scsi_init_lun(llun, tmpl_llun->pci, tmpl_llun->iobase,
163 tmpl_llun->target, lun);
164
165 boot_lchs_find_scsi_device(llun->pci, llun->target, llun->lun,
166 &(llun->drive.lchs));
167 char *name = znprintf(MAXDESCSIZE, "lsi %pP %d:%d",
168 llun->pci, llun->target, llun->lun);
169 int prio = bootprio_find_scsi_device(llun->pci, llun->target, llun->lun);
170 int ret = scsi_drive_setup(&llun->drive, name, prio, llun->target, llun->lun);
171 free(name);
172 if (ret)
173 goto fail;
174 return 0;
175
176 fail:
177 free(llun);
178 return -1;
179 }
180
181 static void
lsi_scsi_scan_target(struct pci_device * pci,u32 iobase,u8 target)182 lsi_scsi_scan_target(struct pci_device *pci, u32 iobase, u8 target)
183 {
184 struct lsi_lun_s llun0;
185
186 lsi_scsi_init_lun(&llun0, pci, iobase, target, 0);
187
188 if (scsi_rep_luns_scan(&llun0.drive, lsi_scsi_add_lun) < 0)
189 scsi_sequential_scan(&llun0.drive, 8, lsi_scsi_add_lun);
190 }
191
192 static void
init_lsi_scsi(void * data)193 init_lsi_scsi(void *data)
194 {
195 struct pci_device *pci = data;
196 u32 iobase = pci_enable_iobar(pci, PCI_BASE_ADDRESS_0);
197 if (!iobase)
198 return;
199 pci_enable_busmaster(pci);
200
201 dprintf(1, "found lsi53c895a at %pP, io @ %x\n", pci, iobase);
202
203 // reset
204 outb(LSI_ISTAT0_SRST, iobase + LSI_REG_ISTAT0);
205
206 int i;
207 for (i = 0; i < 7; i++)
208 lsi_scsi_scan_target(pci, iobase, i);
209 }
210
211 void
lsi_scsi_setup(void)212 lsi_scsi_setup(void)
213 {
214 ASSERT32FLAT();
215 if (!CONFIG_LSI_SCSI || !runningOnQEMU())
216 return;
217
218 dprintf(3, "init lsi53c895a\n");
219
220 struct pci_device *pci;
221 foreachpci(pci) {
222 if (pci->vendor != PCI_VENDOR_ID_LSI_LOGIC
223 || pci->device != PCI_DEVICE_ID_LSI_53C895A)
224 continue;
225 run_thread(init_lsi_scsi, pci);
226 }
227 }
228